Concept and Symbol Index (Using the GNU Compiler Collection (GCC))

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A.2 Concept and Symbol Index ¶

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	Index Entry	Section

	‘`_`’ in variables in macros	Typeof
	__atomic builtins	__atomic Builtins
	`__atomic_add_fetch`	__atomic Builtins
	`__atomic_always_lock_free`	__atomic Builtins
	`__atomic_and_fetch`	__atomic Builtins
	`__atomic_clear`	__atomic Builtins
	`__atomic_compare_exchange`	__atomic Builtins
	`__atomic_compare_exchange_n`	__atomic Builtins
	`__atomic_exchange`	__atomic Builtins
	`__atomic_exchange_n`	__atomic Builtins
	`__atomic_fetch_add`	__atomic Builtins
	`__atomic_fetch_and`	__atomic Builtins
	`__atomic_fetch_nand`	__atomic Builtins
	`__atomic_fetch_or`	__atomic Builtins
	`__atomic_fetch_sub`	__atomic Builtins
	`__atomic_fetch_xor`	__atomic Builtins
	`__atomic_is_lock_free`	__atomic Builtins
	`__atomic_load`	__atomic Builtins
	`__atomic_load_n`	__atomic Builtins
	`__atomic_nand_fetch`	__atomic Builtins
	`__atomic_or_fetch`	__atomic Builtins
	`__atomic_signal_fence`	__atomic Builtins
	`__atomic_store`	__atomic Builtins
	`__atomic_store_n`	__atomic Builtins
	`__atomic_sub_fetch`	__atomic Builtins
	`__atomic_test_and_set`	__atomic Builtins
	`__atomic_thread_fence`	__atomic Builtins
	`__atomic_xor_fetch`	__atomic Builtins
	`__auto_type` in GNU C	Typeof
	`__builtin___clear_cache`	Other Builtins
	`__builtin___memcpy_chk`	Object Size Checking
	`__builtin___memmove_chk`	Object Size Checking
	`__builtin___mempcpy_chk`	Object Size Checking
	`__builtin___memset_chk`	Object Size Checking
	`__builtin___snprintf_chk`	Object Size Checking
	`__builtin___sprintf_chk`	Object Size Checking
	`__builtin___stpcpy_chk`	Object Size Checking
	`__builtin___strcat_chk`	Object Size Checking
	`__builtin___strcpy_chk`	Object Size Checking
	`__builtin___strncat_chk`	Object Size Checking
	`__builtin___strncpy_chk`	Object Size Checking
	`__builtin___strub_enter`	Stack Scrubbing
	`__builtin___strub_leave`	Stack Scrubbing
	`__builtin___strub_update`	Stack Scrubbing
	`__builtin___vsnprintf_chk`	Object Size Checking
	`__builtin___vsprintf_chk`	Object Size Checking
	`__builtin_add_overflow`	Integer Overflow Builtins
	`__builtin_add_overflow_p`	Integer Overflow Builtins
	`__builtin_addc`	Integer Overflow Builtins
	`__builtin_addcl`	Integer Overflow Builtins
	`__builtin_addcll`	Integer Overflow Builtins
	`__builtin_addf128_round_to_odd`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_alloca`	Stack Allocation
	`__builtin_alloca_with_align`	Stack Allocation
	`__builtin_alloca_with_align_and_max`	Stack Allocation
	`__builtin_apply`	Constructing Calls
	`__builtin_apply_args`	Constructing Calls
	`__builtin_arc_aligned`	ARC Built-in Functions
	`__builtin_arc_brk`	ARC Built-in Functions
	`__builtin_arc_core_read`	ARC Built-in Functions
	`__builtin_arc_core_write`	ARC Built-in Functions
	`__builtin_arc_divaw`	ARC Built-in Functions
	`__builtin_arc_flag`	ARC Built-in Functions
	`__builtin_arc_lr`	ARC Built-in Functions
	`__builtin_arc_mul64`	ARC Built-in Functions
	`__builtin_arc_mulu64`	ARC Built-in Functions
	`__builtin_arc_nop`	ARC Built-in Functions
	`__builtin_arc_norm`	ARC Built-in Functions
	`__builtin_arc_normw`	ARC Built-in Functions
	`__builtin_arc_rtie`	ARC Built-in Functions
	`__builtin_arc_sleep`	ARC Built-in Functions
	`__builtin_arc_sr`	ARC Built-in Functions
	`__builtin_arc_swap`	ARC Built-in Functions
	`__builtin_arc_swi`	ARC Built-in Functions
	`__builtin_arc_sync`	ARC Built-in Functions
	`__builtin_arc_trap_s`	ARC Built-in Functions
	`__builtin_arc_unimp_s`	ARC Built-in Functions
	`__builtin_assoc_barrier`	Other Builtins
	`__builtin_assume_aligned`	Other Builtins
	`__builtin_avr_cli`	AVR Built-in Functions
	`__builtin_avr_delay_cycles`	AVR Built-in Functions
	`__builtin_avr_flash_segment`	AVR Built-in Functions
	`__builtin_avr_fmul`	AVR Built-in Functions
	`__builtin_avr_fmuls`	AVR Built-in Functions
	`__builtin_avr_fmulsu`	AVR Built-in Functions
	`__builtin_avr_insert_bits`	AVR Built-in Functions
	`__builtin_avr_mask1`	AVR Built-in Functions
	`__builtin_avr_nop`	AVR Built-in Functions
	`__builtin_avr_nops`	AVR Built-in Functions
	`__builtin_avr_sei`	AVR Built-in Functions
	`__builtin_avr_sleep`	AVR Built-in Functions
	`__builtin_avr_strlen_flash`	AVR Built-in Functions
	`__builtin_avr_strlen_flashx`	AVR Built-in Functions
	`__builtin_avr_strlen_memx`	AVR Built-in Functions
	`__builtin_avr_swap`	AVR Built-in Functions
	`__builtin_avr_wdr`	AVR Built-in Functions
	`__builtin_bit_cast`	Other Builtins
	`__builtin_bpf_load_byte`	BPF Built-in Functions
	`__builtin_bpf_load_half`	BPF Built-in Functions
	`__builtin_bpf_load_word`	BPF Built-in Functions
	`__builtin_bswap128`	Byte-Swapping Builtins
	`__builtin_bswap16`	Byte-Swapping Builtins
	`__builtin_bswap32`	Byte-Swapping Builtins
	`__builtin_bswap64`	Byte-Swapping Builtins
	`__builtin_btf_type_id`	BPF Built-in Functions
	`__builtin_call_with_static_chain`	Constructing Calls
	`__builtin_cfuged`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`__builtin_choose_expr`	Other Builtins
	`__builtin_classify_type`	Other Builtins
	`__builtin_classify_type`	Other Builtins
	`__builtin_clear_padding`	Other Builtins
	`__builtin_clrsb`	Bit Operation Builtins
	`__builtin_clrsbg`	Bit Operation Builtins
	`__builtin_clrsbl`	Bit Operation Builtins
	`__builtin_clrsbll`	Bit Operation Builtins
	`__builtin_clz`	Bit Operation Builtins
	`__builtin_clzg`	Bit Operation Builtins
	`__builtin_clzl`	Bit Operation Builtins
	`__builtin_clzll`	Bit Operation Builtins
	`__builtin_cntlzdm`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`__builtin_cnttzdm`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`__builtin_complex`	Complex
	`__builtin_constant_p`	Other Builtins
	`__builtin_convertvector`	Vector Extensions
	`__builtin_copysignq`	x86 Built-in Functions
	`__builtin_counted_by_ref`	Other Builtins
	`__builtin_cpu_init`	Basic PowerPC Built-in Functions Available on all Configurations
	`__builtin_cpu_init`	x86 Built-in Functions
	`__builtin_cpu_is`	Basic PowerPC Built-in Functions Available on all Configurations
	`__builtin_cpu_is`	x86 Built-in Functions
	`__builtin_cpu_supports`	Basic PowerPC Built-in Functions Available on all Configurations
	`__builtin_cpu_supports`	x86 Built-in Functions
	`__builtin_crc16_data16`	CRC Builtins
	`__builtin_crc16_data8`	CRC Builtins
	`__builtin_crc32_data16`	CRC Builtins
	`__builtin_crc32_data32`	CRC Builtins
	`__builtin_crc32_data8`	CRC Builtins
	`__builtin_crc64_data16`	CRC Builtins
	`__builtin_crc64_data32`	CRC Builtins
	`__builtin_crc64_data64`	CRC Builtins
	`__builtin_crc64_data8`	CRC Builtins
	`__builtin_crc8_data8`	CRC Builtins
	`__builtin_ctz`	Bit Operation Builtins
	`__builtin_ctzg`	Bit Operation Builtins
	`__builtin_ctzl`	Bit Operation Builtins
	`__builtin_ctzll`	Bit Operation Builtins
	`__builtin_darn`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_darn_32`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_darn_raw`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_divf128_round_to_odd`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_dynamic_object_size`	Object Size Checking
	`__builtin_expect`	Other Builtins
	`__builtin_expect_with_probability`	Other Builtins
	`__builtin_extend_pointer`	Other Builtins
	`__builtin_extract_return_addr`	Return Address
	`__builtin_fabsq`	x86 Built-in Functions
	`__builtin_ffs`	Bit Operation Builtins
	`__builtin_ffsg`	Bit Operation Builtins
	`__builtin_ffsl`	Bit Operation Builtins
	`__builtin_ffsll`	Bit Operation Builtins
	`__builtin_FILE`	Other Builtins
	`__builtin_fmaf128_round_to_odd`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_fpclassify`	Floating-Point Format Builtins
	`__builtin_frame_address`	Return Address
	`__builtin_frob_return_addr`	Return Address
	`__builtin_FUNCTION`	Other Builtins
	`__builtin_goacc_parlevel_id`	Other Builtins
	`__builtin_goacc_parlevel_size`	Other Builtins
	`__builtin_has_attribute`	Other Builtins
	`__builtin_huge_val`	Floating-Point Format Builtins
	`__builtin_huge_valf`	Floating-Point Format Builtins
	`__builtin_huge_valfn`	Floating-Point Format Builtins
	`__builtin_huge_valfnx`	Floating-Point Format Builtins
	`__builtin_huge_vall`	Floating-Point Format Builtins
	`__builtin_huge_valq`	x86 Built-in Functions
	`__builtin_ia32_crc32di`	x86 Built-in Functions
	`__builtin_ia32_crc32hi`	x86 Built-in Functions
	`__builtin_ia32_crc32qi`	x86 Built-in Functions
	`__builtin_ia32_crc32si`	x86 Built-in Functions
	`__builtin_ia32_loadhps`	x86 Built-in Functions
	`__builtin_ia32_loadlps`	x86 Built-in Functions
	`__builtin_ia32_loadss`	x86 Built-in Functions
	`__builtin_ia32_loadups`	x86 Built-in Functions
	`__builtin_ia32_pause`	x86 Built-in Functions
	`__builtin_ia32_pclmulqdq128`	x86 Built-in Functions
	`__builtin_ia32_storehps`	x86 Built-in Functions
	`__builtin_ia32_storelps`	x86 Built-in Functions
	`__builtin_ia32_storeups`	x86 Built-in Functions
	`__builtin_ia32_vec_ext_v16qi`	x86 Built-in Functions
	`__builtin_ia32_vec_ext_v2di`	x86 Built-in Functions
	`__builtin_ia32_vec_ext_v4sf`	x86 Built-in Functions
	`__builtin_ia32_vec_ext_v4si`	x86 Built-in Functions
	`__builtin_ia32_vec_set_v16qi`	x86 Built-in Functions
	`__builtin_ia32_vec_set_v2di`	x86 Built-in Functions
	`__builtin_ia32_vec_set_v4sf`	x86 Built-in Functions
	`__builtin_ia32_vec_set_v4si`	x86 Built-in Functions
	`__builtin_inf`	Floating-Point Format Builtins
	`__builtin_infd128`	Floating-Point Format Builtins
	`__builtin_infd32`	Floating-Point Format Builtins
	`__builtin_infd64`	Floating-Point Format Builtins
	`__builtin_inff`	Floating-Point Format Builtins
	`__builtin_inffn`	Floating-Point Format Builtins
	`__builtin_inffnx`	Floating-Point Format Builtins
	`__builtin_infl`	Floating-Point Format Builtins
	`__builtin_infq`	x86 Built-in Functions
	`__builtin_is_constant_evaluated`	Other Builtins
	`__builtin_is_virtual_base_of`	Type Traits
	`__builtin_iseqsig`	Library Builtins
	`__builtin_isfinite`	Library Builtins
	`__builtin_isgreater`	Library Builtins
	`__builtin_isgreaterequal`	Library Builtins
	`__builtin_isinf_sign`	Floating-Point Format Builtins
	`__builtin_isnormal`	Library Builtins
	`__builtin_issignaling`	Floating-Point Format Builtins
	`__builtin_isunordered`	Library Builtins
	`__builtin_LINE`	Other Builtins
	`__builtin_longjmp`	Nonlocal Gotos
	`__builtin_mul_overflow`	Integer Overflow Builtins
	`__builtin_mul_overflow_p`	Integer Overflow Builtins
	`__builtin_mulf128_round_to_odd`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_nan`	Floating-Point Format Builtins
	`__builtin_nand128`	Floating-Point Format Builtins
	`__builtin_nand32`	Floating-Point Format Builtins
	`__builtin_nand64`	Floating-Point Format Builtins
	`__builtin_nanf`	Floating-Point Format Builtins
	`__builtin_nanfn`	Floating-Point Format Builtins
	`__builtin_nanfnx`	Floating-Point Format Builtins
	`__builtin_nanl`	Floating-Point Format Builtins
	`__builtin_nanq`	x86 Built-in Functions
	`__builtin_nans`	Floating-Point Format Builtins
	`__builtin_nansd128`	Floating-Point Format Builtins
	`__builtin_nansd32`	Floating-Point Format Builtins
	`__builtin_nansd64`	Floating-Point Format Builtins
	`__builtin_nansf`	Floating-Point Format Builtins
	`__builtin_nansfn`	Floating-Point Format Builtins
	`__builtin_nansfnx`	Floating-Point Format Builtins
	`__builtin_nansl`	Floating-Point Format Builtins
	`__builtin_nansq`	x86 Built-in Functions
	`__builtin_nds32_isb`	NDS32 Built-in Functions
	`__builtin_nds32_isync`	NDS32 Built-in Functions
	`__builtin_nds32_mfsr`	NDS32 Built-in Functions
	`__builtin_nds32_mfusr`	NDS32 Built-in Functions
	`__builtin_nds32_mtsr`	NDS32 Built-in Functions
	`__builtin_nds32_mtusr`	NDS32 Built-in Functions
	`__builtin_nds32_setgie_dis`	NDS32 Built-in Functions
	`__builtin_nds32_setgie_en`	NDS32 Built-in Functions
	`__builtin_non_tx_store`	S/390 System z Built-in Functions
	`__builtin_nvptx_brev`	Nvidia PTX Built-in Functions
	`__builtin_nvptx_brevll`	Nvidia PTX Built-in Functions
	`__builtin_object_size`	Object Size Checking
	`__builtin_offsetof`	Offsetof
	`__builtin_operator_delete`	New/Delete Builtins
	`__builtin_operator_new`	New/Delete Builtins
	`__builtin_parity`	Bit Operation Builtins
	`__builtin_parityg`	Bit Operation Builtins
	`__builtin_parityl`	Bit Operation Builtins
	`__builtin_parityll`	Bit Operation Builtins
	`__builtin_pdepd`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`__builtin_pextd`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`__builtin_popcount`	Bit Operation Builtins
	`__builtin_popcount`	x86 Built-in Functions
	`__builtin_popcountg`	Bit Operation Builtins
	`__builtin_popcountl`	Bit Operation Builtins
	`__builtin_popcountl`	x86 Built-in Functions
	`__builtin_popcountll`	Bit Operation Builtins
	`__builtin_popcountll`	x86 Built-in Functions
	`__builtin_powi`	Floating-Point Format Builtins
	`__builtin_powif`	Floating-Point Format Builtins
	`__builtin_powil`	Floating-Point Format Builtins
	`__builtin_prefetch`	Other Builtins
	`__builtin_preserve_access_index`	BPF Built-in Functions
	`__builtin_preserve_enum_value`	BPF Built-in Functions
	`__builtin_preserve_field_info`	BPF Built-in Functions
	`__builtin_preserve_type_info`	BPF Built-in Functions
	`__builtin_return`	Constructing Calls
	`__builtin_return_address`	Return Address
	`__builtin_rev_crc16_data16`	CRC Builtins
	`__builtin_rev_crc16_data8`	CRC Builtins
	`__builtin_rev_crc32_data16`	CRC Builtins
	`__builtin_rev_crc32_data32`	CRC Builtins
	`__builtin_rev_crc32_data8`	CRC Builtins
	`__builtin_rev_crc64_data16`	CRC Builtins
	`__builtin_rev_crc64_data32`	CRC Builtins
	`__builtin_rev_crc64_data64`	CRC Builtins
	`__builtin_rev_crc64_data8`	CRC Builtins
	`__builtin_rev_crc8_data8`	CRC Builtins
	`__builtin_riscv_cv_alu_addN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_addRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_adduN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_adduRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_clip`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_clipu`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_extbs`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_extbz`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_exths`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_exthz`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_max`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_maxu`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_min`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_minu`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_slet`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_sletu`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_subN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_subRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_subuN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_alu_subuRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_elw_elw`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_mac`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_machhsN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_machhsRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_machhuN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_machhuRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_macsN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_macsRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_macuN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_macuRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_msu`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_mulhhsN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_mulhhsRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_mulhhuN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_mulhhuRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_mulsN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_mulsRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_muluN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_mac_muluRN`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_abs_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_abs_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_add_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_and_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_and_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_and_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_and_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_and_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_and_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avg_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avg_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avg_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avg_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avg_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avg_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avgu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avgu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avgu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avgu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avgu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_avgu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpeq_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpeq_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpeq_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpeq_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpeq_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpeq_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpge_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpge_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpge_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpge_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpge_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpge_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgeu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgeu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgeu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgeu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgeu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgeu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgt_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgt_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgt_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgt_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgt_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgt_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgtu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgtu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgtu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgtu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgtu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpgtu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmple_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmple_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmple_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmple_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmple_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmple_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpleu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpleu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpleu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpleu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpleu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpleu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmplt_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmplt_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmplt_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmplt_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmplt_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmplt_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpltu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpltu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpltu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpltu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpltu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpltu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpne_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpne_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpne_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpne_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpne_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cmpne_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxconj`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_i`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_i`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_i`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_i`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_r`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_r`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_r`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_cplxmul_r`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotsp_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotsp_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotsp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotsp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotsp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotsp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotup_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotup_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotup_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotup_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotup_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotup_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotusp_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotusp_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotusp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotusp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotusp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_dotusp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_extract_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_extract_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_extractu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_extractu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_insert_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_insert_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_max_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_max_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_max_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_max_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_max_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_max_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_maxu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_maxu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_maxu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_maxu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_maxu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_maxu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_min_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_min_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_min_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_min_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_min_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_min_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_minu_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_minu_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_minu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_minu_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_minu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_minu_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_or_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_or_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_or_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_or_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_or_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_or_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_packhi_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_packhi_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_packlo_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_packlo_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotsp_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotsp_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotsp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotsp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotsp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotsp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotup_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotup_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotup_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotup_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotup_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotup_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotusp_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotusp_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotusp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotusp_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotusp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sdotusp_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shuffle_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shuffle_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shuffle_sci_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shuffle2_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shuffle2_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shufflei0_sci_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shufflei1_sci_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shufflei2_sci_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_shufflei3_sci_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sll_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sll_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sll_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sll_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sll_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sll_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sra_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sra_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sra_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sra_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sra_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sra_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_srl_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_srl_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_srl_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_srl_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_srl_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_srl_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_sub_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_subrotmj`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_subrotmj`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_subrotmj`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_subrotmj`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_xor_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_xor_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_xor_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_xor_sc_b`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_xor_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_cv_simd_xor_sc_h`	CORE-V Built-in Functions
	`__builtin_riscv_pause`	RISC-V Built-in Functions
	`__builtin_rx_brk`	RX Built-in Functions
	`__builtin_rx_clrpsw`	RX Built-in Functions
	`__builtin_rx_int`	RX Built-in Functions
	`__builtin_rx_machi`	RX Built-in Functions
	`__builtin_rx_maclo`	RX Built-in Functions
	`__builtin_rx_mulhi`	RX Built-in Functions
	`__builtin_rx_mullo`	RX Built-in Functions
	`__builtin_rx_mvfachi`	RX Built-in Functions
	`__builtin_rx_mvfacmi`	RX Built-in Functions
	`__builtin_rx_mvfc`	RX Built-in Functions
	`__builtin_rx_mvtachi`	RX Built-in Functions
	`__builtin_rx_mvtaclo`	RX Built-in Functions
	`__builtin_rx_mvtc`	RX Built-in Functions
	`__builtin_rx_mvtipl`	RX Built-in Functions
	`__builtin_rx_racw`	RX Built-in Functions
	`__builtin_rx_revw`	RX Built-in Functions
	`__builtin_rx_rmpa`	RX Built-in Functions
	`__builtin_rx_round`	RX Built-in Functions
	`__builtin_rx_sat`	RX Built-in Functions
	`__builtin_rx_setpsw`	RX Built-in Functions
	`__builtin_rx_wait`	RX Built-in Functions
	`__builtin_sadd_overflow`	Integer Overflow Builtins
	`__builtin_saddl_overflow`	Integer Overflow Builtins
	`__builtin_saddll_overflow`	Integer Overflow Builtins
	`__builtin_set_thread_pointer`	SH Built-in Functions
	`__builtin_setjmp`	Nonlocal Gotos
	`__builtin_sh_get_fpscr`	SH Built-in Functions
	`__builtin_sh_set_fpscr`	SH Built-in Functions
	`__builtin_shuffle`	Vector Extensions
	`__builtin_shufflevector`	Vector Extensions
	`__builtin_smul_overflow`	Integer Overflow Builtins
	`__builtin_smull_overflow`	Integer Overflow Builtins
	`__builtin_smulll_overflow`	Integer Overflow Builtins
	`__builtin_speculation_safe_value`	Library Builtins
	`__builtin_speculation_safe_value`	Other Builtins
	`__builtin_sqrtf128_round_to_odd`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_ssub_overflow`	Integer Overflow Builtins
	`__builtin_ssubl_overflow`	Integer Overflow Builtins
	`__builtin_ssubll_overflow`	Integer Overflow Builtins
	`__builtin_stack_address`	Return Address
	`__builtin_stdc_bit_ceil`	Bit Operation Builtins
	`__builtin_stdc_bit_floor`	Bit Operation Builtins
	`__builtin_stdc_bit_width`	Bit Operation Builtins
	`__builtin_stdc_count_ones`	Bit Operation Builtins
	`__builtin_stdc_count_zeros`	Bit Operation Builtins
	`__builtin_stdc_first_leading_one`	Bit Operation Builtins
	`__builtin_stdc_first_leading_zero`	Bit Operation Builtins
	`__builtin_stdc_first_trailing_one`	Bit Operation Builtins
	`__builtin_stdc_first_trailing_zero`	Bit Operation Builtins
	`__builtin_stdc_has_single_bit`	Bit Operation Builtins
	`__builtin_stdc_leading_ones`	Bit Operation Builtins
	`__builtin_stdc_leading_zeros`	Bit Operation Builtins
	`__builtin_stdc_rotate_left`	Bit Operation Builtins
	`__builtin_stdc_rotate_right`	Bit Operation Builtins
	`__builtin_stdc_trailing_ones`	Bit Operation Builtins
	`__builtin_stdc_trailing_zeros`	Bit Operation Builtins
	`__builtin_structured_binding_size`	Type Traits
	`__builtin_sub_overflow`	Integer Overflow Builtins
	`__builtin_sub_overflow_p`	Integer Overflow Builtins
	`__builtin_subc`	Integer Overflow Builtins
	`__builtin_subcl`	Integer Overflow Builtins
	`__builtin_subcll`	Integer Overflow Builtins
	`__builtin_subf128_round_to_odd`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_tabort`	S/390 System z Built-in Functions
	`__builtin_tbegin`	S/390 System z Built-in Functions
	`__builtin_tbegin_nofloat`	S/390 System z Built-in Functions
	`__builtin_tbegin_retry`	S/390 System z Built-in Functions
	`__builtin_tbegin_retry_nofloat`	S/390 System z Built-in Functions
	`__builtin_tbeginc`	S/390 System z Built-in Functions
	`__builtin_tend`	S/390 System z Built-in Functions
	`__builtin_tgmath`	Other Builtins
	`__builtin_thread_pointer`	RISC-V Built-in Functions
	`__builtin_thread_pointer`	SH Built-in Functions
	`__builtin_trap`	Other Builtins
	`__builtin_truncf128_round_to_odd`	Basic PowerPC Built-in Functions Available on ISA 3.0
	`__builtin_tx_assist`	S/390 System z Built-in Functions
	`__builtin_tx_nesting_depth`	S/390 System z Built-in Functions
	`__builtin_types_compatible_p`	Other Builtins
	`__builtin_uadd_overflow`	Integer Overflow Builtins
	`__builtin_uaddl_overflow`	Integer Overflow Builtins
	`__builtin_uaddll_overflow`	Integer Overflow Builtins
	`__builtin_umul_overflow`	Integer Overflow Builtins
	`__builtin_umull_overflow`	Integer Overflow Builtins
	`__builtin_umulll_overflow`	Integer Overflow Builtins
	`__builtin_unreachable`	Other Builtins
	`__builtin_usub_overflow`	Integer Overflow Builtins
	`__builtin_usubl_overflow`	Integer Overflow Builtins
	`__builtin_usubll_overflow`	Integer Overflow Builtins
	`__builtin_va_arg_pack`	Constructing Calls
	`__builtin_va_arg_pack_len`	Constructing Calls
	`__complex__` keyword	Complex
	`__declspec(dllexport)`	Microsoft Windows Function Attributes
	`__declspec(dllimport)`	Microsoft Windows Function Attributes
	`__delay_cycles`	PRU Built-in Functions
	`__extension__`	Alternate Keywords
	`__far` M32C Named Address Spaces	Named Address Spaces
	`__far` RL78 Named Address Spaces	Named Address Spaces
	`__flash` AVR Named Address Spaces	Named Address Spaces
	`__flash1` AVR Named Address Spaces	Named Address Spaces
	`__flash2` AVR Named Address Spaces	Named Address Spaces
	`__flash3` AVR Named Address Spaces	Named Address Spaces
	`__flash4` AVR Named Address Spaces	Named Address Spaces
	`__flash5` AVR Named Address Spaces	Named Address Spaces
	`__flashx` AVR Named Address Spaces	Named Address Spaces
	`__float128` data type	Floating Types
	`__Float16` data type	Half-Precision
	`__float80` data type	Floating Types
	`__fp16` data type	Half-Precision
	`__func__` identifier	Function Names
	`__FUNCTION__` identifier	Function Names
	`__halt`	PRU Built-in Functions
	`__has_nothrow_assign`	Type Traits
	`__has_nothrow_constructor`	Type Traits
	`__has_nothrow_copy`	Type Traits
	`__has_trivial_assign`	Type Traits
	`__has_trivial_constructor`	Type Traits
	`__has_trivial_copy`	Type Traits
	`__has_trivial_destructor`	Type Traits
	`__has_virtual_destructor`	Type Traits
	`__ibm128` data type	Floating Types
	`__imag__` keyword	Complex
	`__int128` data types	__int128
	`__integer_pack`	Type Traits
	`__is_abstract`	Type Traits
	`__is_aggregate`	Type Traits
	`__is_base_of`	Type Traits
	`__is_class`	Type Traits
	`__is_empty`	Type Traits
	`__is_enum`	Type Traits
	`__is_final`	Type Traits
	`__is_literal_type`	Type Traits
	`__is_pod`	Type Traits
	`__is_polymorphic`	Type Traits
	`__is_same`	Type Traits
	`__is_standard_layout`	Type Traits
	`__is_trivial`	Type Traits
	`__is_union`	Type Traits
	`__lmbd`	PRU Built-in Functions
	`__memx` AVR Named Address Spaces	Named Address Spaces
	`__PRETTY_FUNCTION__` identifier	Function Names
	`__real__` keyword	Complex
	`__regio_symbol` PRU Named Address Spaces	Named Address Spaces
	`__seg_fs` x86 named address space	Named Address Spaces
	`__seg_gs` x86 named address space	Named Address Spaces
	`__STDC_HOSTED__`	Standards
	__sync builtins	__sync Builtins
	`__sync_add_and_fetch`	__sync Builtins
	`__sync_and_and_fetch`	__sync Builtins
	`__sync_bool_compare_and_swap`	__sync Builtins
	`__sync_fetch_and_add`	__sync Builtins
	`__sync_fetch_and_and`	__sync Builtins
	`__sync_fetch_and_nand`	__sync Builtins
	`__sync_fetch_and_or`	__sync Builtins
	`__sync_fetch_and_sub`	__sync Builtins
	`__sync_fetch_and_xor`	__sync Builtins
	`__sync_lock_release`	__sync Builtins
	`__sync_lock_test_and_set`	__sync Builtins
	`__sync_nand_and_fetch`	__sync Builtins
	`__sync_or_and_fetch`	__sync Builtins
	`__sync_sub_and_fetch`	__sync Builtins
	`__sync_synchronize`	__sync Builtins
	`__sync_val_compare_and_swap`	__sync Builtins
	`__sync_xor_and_fetch`	__sync Builtins
	`__thread`	Thread-Local
	`__underlying_type`	Type Traits
	`_Accum` data type	Fixed-Point
	`_Bool` keyword	Boolean Type
	`_Complex` keyword	Complex
	_Countof	_Countof
	`_Decimal128` data type	Decimal Float
	`_Decimal32` data type	Decimal Float
	`_Decimal64` data type	Decimal Float
	`_Exit`	Library Builtins
	`_exit`	Library Builtins
	`_Floatn` data types	Floating Types
	`_Floatnx` data types	Floating Types
	`_Fract` data type	Fixed-Point
	`_get_ssp`	x86 control-flow protection intrinsics
	`_HTM_FIRST_USER_ABORT_CODE`	S/390 System z Built-in Functions
	`_HTM_TBEGIN_INDETERMINATE`	S/390 System z Built-in Functions
	`_HTM_TBEGIN_PERSISTENT`	S/390 System z Built-in Functions
	`_HTM_TBEGIN_STARTED`	S/390 System z Built-in Functions
	`_HTM_TBEGIN_TRANSIENT`	S/390 System z Built-in Functions
	`_inc_ssp`	x86 control-flow protection intrinsics
	`_Sat` data type	Fixed-Point
	`_xabort`	x86 transactional memory intrinsics
	`_XABORT_CAPACITY`	x86 transactional memory intrinsics
	`_XABORT_CONFLICT`	x86 transactional memory intrinsics
	`_XABORT_DEBUG`	x86 transactional memory intrinsics
	`_XABORT_EXPLICIT`	x86 transactional memory intrinsics
	`_XABORT_NESTED`	x86 transactional memory intrinsics
	`_XABORT_RETRY`	x86 transactional memory intrinsics
	`_xbegin`	x86 transactional memory intrinsics
	`_xend`	x86 transactional memory intrinsics
	`_xtest`	x86 transactional memory intrinsics

-
	‘`-`’ in constraint	Modifiers
	`-lgcc`, use with `-nodefaultlibs`	Link Options
	`-lgcc`, use with `-nostdlib`	Link Options
	`-march` feature modifiers	AArch64 Options
	`-mcpu` feature modifiers	AArch64 Options
	`-nodefaultlibs` and unresolved references	Link Options
	`-nostdlib` and unresolved references	Link Options

:
	‘`:`’ in constraint	Simple Constraints

?
	`?:` extensions	Conditionals
	`?:` side effect	Conditionals

.
	.sdata/.sdata2 references (PowerPC)	RS/6000 and PowerPC Options

'
	`'`	Incompatibilities

/
	`//`	C++ Comments

&
	‘`&`’ in constraint	Modifiers

#
	`#pragma`	Pragmas
	`#pragma implementation`	C++ Interface
	`#pragma implementation`, implied	C++ Interface
	`#pragma interface`	C++ Interface

%
	‘`%`’ in constraint	Modifiers
	`%include`	Spec Files
	`%include_noerr`	Spec Files
	`%rename`	Spec Files

+
	‘`+`’ in constraint	Modifiers

<
	‘`<`’ in constraint	Simple Constraints

=
	‘`=`’ in constraint	Modifiers

>
	‘`>`’ in constraint	Simple Constraints

$
	$	Dollar Signs

0
	‘`0`’ in constraint	Simple Constraints

A
	AArch64 Options	AArch64 Options
	ABI	Compatibility
	`abi_tag` function attribute	C++ Attributes
	`abi_tag` type attribute	C++ Attributes
	`abi_tag` variable attribute	C++ Attributes
	`abort`	Library Builtins
	`abs`	Library Builtins
	`absdata` variable attribute, AVR	AVR Variable Attributes
	`access` function attribute	Common Function Attributes
	accessing volatiles	Volatiles
	accessing volatiles	C++ Volatiles
	`acos`	Library Builtins
	`acosf`	Library Builtins
	`acosh`	Library Builtins
	`acoshf`	Library Builtins
	`acoshl`	Library Builtins
	`acosl`	Library Builtins
	`acospi`	Library Builtins
	`acospif`	Library Builtins
	`acospil`	Library Builtins
	Ada	G++ and GCC
	Ada	G++ and GCC
	additional floating types	Floating Types
	address constraints	Simple Constraints
	address of a label	Labels as Values
	`address` variable attribute, AVR	AVR Variable Attributes
	`address_operand`	Simple Constraints
	`alias` function attribute	Common Function Attributes
	`alias` variable attribute	Common Variable Attributes
	`aligned` function attribute	Common Function Attributes
	`aligned` type attribute	Common Type Attributes
	`aligned` variable attribute	Common Variable Attributes
	alignment	Alignment
	`alloc_align` function attribute	Common Function Attributes
	`alloc_size` function attribute	Common Function Attributes
	`alloc_size` type attribute	Common Type Attributes
	`alloc_size` variable attribute	Common Variable Attributes
	`alloca`	Library Builtins
	`alloca` vs variable-length arrays	Variable Length
	Allow nesting in an interrupt handler on the Blackfin processor	Blackfin Function Attributes
	alternate keywords	Alternate Keywords
	`altivec` type attribute, PowerPC	PowerPC Type Attributes
	`altivec` variable attribute, PowerPC	PowerPC Variable Attributes
	`always_inline` function attribute	Common Function Attributes
	AMD GCN Options	AMD GCN Options
	AMD1	Standards
	`amdgpu_hsa_kernel` function attribute, AMD GCN	AMD GCN Function Attributes
	ANSI C	Standards
	ANSI C standard	Standards
	ANSI C89	Standards
	ANSI support	C Dialect Options
	ANSI X3.159-1989	Standards
	apostrophes	Incompatibilities
	application binary interface	Compatibility
	ARC options	ARC Options
	`arch=` function attribute, AArch64	AArch64 Function Attributes
	`arch=` function attribute, ARM	ARM Function Attributes
	`arch=` function attribute, LoongArch	LoongArch Function Attributes
	`arch=` function attribute, RISC-V	RISC-V Function Attributes
	ARM [Annotated C++ Reference Manual]	Backwards Compatibility
	ARM options	ARM Options
	arrays of length zero	Zero Length
	arrays of variable length	Variable Length
	arrays, non-lvalue	Subscripting
	`artificial` function attribute	Common Function Attributes
	`asin`	Library Builtins
	`asinf`	Library Builtins
	`asinh`	Library Builtins
	`asinhf`	Library Builtins
	`asinhl`	Library Builtins
	`asinl`	Library Builtins
	`asinpi`	Library Builtins
	`asinpif`	Library Builtins
	`asinpil`	Library Builtins
	`asm` assembler template	Extended Asm
	`asm` clobbers	Extended Asm
	`asm` constraints	Constraints
	`asm` expressions	Extended Asm
	`asm` flag output operands	Extended Asm
	`asm` goto labels	Extended Asm
	`asm inline`	Size of an asm
	`asm` input operands	Extended Asm
	`asm` keyword	Using Assembly Language with C
	`asm` output operands	Extended Asm
	`asm` scratch registers	Extended Asm
	`asm` volatile	Extended Asm
	assembler names for identifiers	Asm Labels
	assembly code, invalid	Bug Criteria
	assembly language in C	Using Assembly Language with C
	assembly language in C, basic	Basic Asm
	assembly language in C, extended	Extended Asm
	`assume` statement attribute	Statement Attributes
	`assume_aligned` function attribute	Common Function Attributes
	`atan`	Library Builtins
	`atan2`	Library Builtins
	`atan2f`	Library Builtins
	`atan2l`	Library Builtins
	`atan2pi`	Library Builtins
	`atan2pif`	Library Builtins
	`atan2pil`	Library Builtins
	`atanf`	Library Builtins
	`atanh`	Library Builtins
	`atanhf`	Library Builtins
	`atanhl`	Library Builtins
	`atanl`	Library Builtins
	`atanpi`	Library Builtins
	`atanpif`	Library Builtins
	`atanpil`	Library Builtins
	atomic memory access builtins	Atomic Memory Access
	attribute of types	Type Attributes
	attribute of variables	Variable Attributes
	attribute syntax	Attribute Syntax
	attributes	Attributes
	autoincrement/decrement addressing	Simple Constraints
	automatic `inline` for C++ member fns	Inline
	`aux` variable attribute, ARC	ARC Variable Attributes
	AVR Options	AVR Options

B
	Backwards Compatibility	Backwards Compatibility
	`bank_switch` function attribute, M32C	M32C Function Attributes
	base class members	Name lookup
	base type of an `enum`	Enum Extensions
	basic `asm`	Basic Asm
	`bcmp`	Library Builtins
	`below100` variable attribute, Xstormy16	Xstormy16 Variable Attributes
	binary compatibility	Compatibility
	Binary constants using the ‘`0b`’ prefix	Binary constants
	bit operation builtins	Bit Operation Builtins
	Blackfin Options	Blackfin Options
	boolean type	Boolean Type
	bound pointer to member function	Bound member functions
	`branch-protection` function attribute, AArch64	AArch64 Function Attributes
	break handler functions	MicroBlaze Function Attributes
	`break_handler` function attribute, MicroBlaze	MicroBlaze Function Attributes
	`brk_interrupt` function attribute, RL78	RL78 Function Attributes
	bug criteria	Bug Criteria
	bugs	Bugs
	bugs, known	Trouble
	built-in functions	C Dialect Options
	Built-in Functions	Built-in Functions
	built-in library functions	Library Builtins
	built-in numeric functions	Numeric Builtins
	builtins for arithmetic overflow checking	Integer Overflow Builtins
	builtins for atomic memory access	Atomic Memory Access
	builtins for C++ `new` and `delete` operators	New/Delete Builtins
	builtins for stack allocation	Stack Allocation
	byte-swapping builtins	Byte-Swapping Builtins
	`bzero`	Library Builtins

C
	C compilation options	Invoking GCC
	C intermediate output, nonexistent	G++ and GCC
	C language extensions	C Extensions
	C language, traditional	Preprocessor Options
	C library function builtins	Library Builtins
	C standard	Standards
	C standard attributes	Attribute Syntax
	C standards	Standards
	`C_INCLUDE_PATH`	Environment Variables
	C-SKY Options	C-SKY Options
	`c++`	Invoking G++
	C++	G++ and GCC
	C++ comments	C++ Comments
	C++ Compiled Module Interface	C++ Compiled Module Interface
	C++ interface and implementation headers	C++ Interface
	C++ language extensions	C++ Extensions
	C++ member fns, automatically `inline`	Inline
	C++ misunderstandings	C++ Misunderstandings
	C++ Module Mapper	C++ Module Mapper
	C++ Module Preprocessing	C++ Module Preprocessing
	C++ options, command-line	C++ Dialect Options
	C++ pragmas, effect on inlining	C++ Interface
	C++ source file suffixes	Invoking G++
	C++ standard attributes	Attribute Syntax
	C++ static data, declaring and defining	Static Definitions
	C++11 memory model	__atomic Builtins
	C11	Standards
	C17	Standards
	C1X	Standards
	C23	Standards
	C2X	Standards
	C2Y	Standards
	C6X Options	C6X Options
	C89	Standards
	C90	Standards
	C94	Standards
	C95	Standards
	C99	Standards
	C9X	Standards
	`cabs`	Library Builtins
	`cabsf`	Library Builtins
	`cabsl`	Library Builtins
	`cacos`	Library Builtins
	`cacosf`	Library Builtins
	`cacosh`	Library Builtins
	`cacoshf`	Library Builtins
	`cacoshl`	Library Builtins
	`cacosl`	Library Builtins
	`callee_pop_aggregate_return` function attribute, x86	x86 Function Attributes
	calling functions through the function vector on SH2A	SH Function Attributes
	`calloc`	Library Builtins
	`carg`	Library Builtins
	`cargf`	Library Builtins
	`cargl`	Library Builtins
	case labels in initializers	Designated Inits
	case ranges	Case Ranges
	`casin`	Library Builtins
	`casinf`	Library Builtins
	`casinh`	Library Builtins
	`casinhf`	Library Builtins
	`casinhl`	Library Builtins
	`casinl`	Library Builtins
	cast to a union	Cast to Union
	`catan`	Library Builtins
	`catanf`	Library Builtins
	`catanh`	Library Builtins
	`catanhf`	Library Builtins
	`catanhl`	Library Builtins
	`catanl`	Library Builtins
	`cbrt`	Library Builtins
	`cbrtf`	Library Builtins
	`cbrtl`	Library Builtins
	`ccos`	Library Builtins
	`ccosf`	Library Builtins
	`ccosh`	Library Builtins
	`ccoshf`	Library Builtins
	`ccoshl`	Library Builtins
	`ccosl`	Library Builtins
	`cdecl` function attribute, x86-32	x86 Function Attributes
	`ceil`	Library Builtins
	`ceilf`	Library Builtins
	`ceill`	Library Builtins
	`cexp`	Library Builtins
	`cexpf`	Library Builtins
	`cexpl`	Library Builtins
	`cf_check` function attribute, x86	x86 Function Attributes
	character set, execution	Preprocessor Options
	character set, input	Preprocessor Options
	character set, input normalization	Warning Options
	character set, wide execution	Preprocessor Options
	`cimag`	Library Builtins
	`cimagf`	Library Builtins
	`cimagl`	Library Builtins
	`cleanup` variable attribute	Common Variable Attributes
	`clog`	Library Builtins
	`clog10`	Library Builtins
	`clog10f`	Library Builtins
	`clog10l`	Library Builtins
	`clogf`	Library Builtins
	`clogl`	Library Builtins
	`cmodel=` function attribute, AArch64	AArch64 Function Attributes
	`cmodel=` function attribute, LoongArch	LoongArch Function Attributes
	COBOL	G++ and GCC
	COBOL	Standards
	code generation conventions	Code Gen Options
	`code_readable` function attribute, MIPS	MIPS Function Attributes
	code, mixed with declarations	Mixed Labels and Declarations
	`cold` function attribute	Common Function Attributes
	`cold` label attribute	Label Attributes
	`cold` type attribute	C++ Attributes
	command options	Invoking GCC
	comments, C++ style	C++ Comments
	`common` variable attribute	Common Variable Attributes
	comparison of signed and unsigned values, warning	Warning Options
	compilation statistics	Developer Options
	compiler bugs, reporting	Bug Reporting
	compiler compared to C++ preprocessor	G++ and GCC
	compiler options, C++	C++ Dialect Options
	compiler options, Objective-C and Objective-C++	Objective-C and Objective-C++ Dialect Options
	compiler version, specifying	Invoking GCC
	`COMPILER_PATH`	Environment Variables
	complex conjugation	Complex
	complex numbers	Complex
	compound literals	Compound Literals
	computed gotos	Labels as Values
	conditional expressions, extensions	Conditionals
	conflicting types	Disappointments
	`conj`	Library Builtins
	`conjf`	Library Builtins
	`conjl`	Library Builtins
	`const` applied to function	Const and Volatile Functions
	`const` function attribute	Common Function Attributes
	const qualifier	Pointers to Arrays
	constants in constraints	Simple Constraints
	constraint modifier characters	Modifiers
	constraint, matching	Simple Constraints
	constraints, `asm`	Constraints
	constraints, machine specific	Machine Constraints
	constructing calls	Constructing Calls
	constructor expressions	Compound Literals
	`constructor` function attribute	Common Function Attributes
	contributors	Contributors
	`copy` function attribute	Common Function Attributes
	`copy` type attribute	Common Type Attributes
	`copy` variable attribute	Common Variable Attributes
	`copysign`	Library Builtins
	`copysignf`	Library Builtins
	`copysignl`	Library Builtins
	core dump	Bug Criteria
	`cos`	Library Builtins
	`cosf`	Library Builtins
	`cosh`	Library Builtins
	`coshf`	Library Builtins
	`coshl`	Library Builtins
	`cosl`	Library Builtins
	`cospi`	Library Builtins
	`cospif`	Library Builtins
	`cospil`	Library Builtins
	`counted_by` variable attribute	Common Variable Attributes
	`CPATH`	Environment Variables
	`CPLUS_INCLUDE_PATH`	Environment Variables
	`cpow`	Library Builtins
	`cpowf`	Library Builtins
	`cpowl`	Library Builtins
	`cproj`	Library Builtins
	`cprojf`	Library Builtins
	`cprojl`	Library Builtins
	`cpu=` function attribute, AArch64	AArch64 Function Attributes
	`cpu=` function attribute, RISC-V	RISC-V Function Attributes
	CRC builtins	CRC Builtins
	`creal`	Library Builtins
	`crealf`	Library Builtins
	`creall`	Library Builtins
	CRIS Options	CRIS Options
	`critical` function attribute, MSP430	MSP430 Function Attributes
	cross compiling	Invoking GCC
	`csin`	Library Builtins
	`csinf`	Library Builtins
	`csinh`	Library Builtins
	`csinhf`	Library Builtins
	`csinhl`	Library Builtins
	`csinl`	Library Builtins
	`csqrt`	Library Builtins
	`csqrtf`	Library Builtins
	`csqrtl`	Library Builtins
	`ctan`	Library Builtins
	`ctanf`	Library Builtins
	`ctanh`	Library Builtins
	`ctanhf`	Library Builtins
	`ctanhl`	Library Builtins
	`ctanl`	Library Builtins
	`CXX_MODULE_MAPPER environment variable`	C++ Dialect Options
	Cygwin and MinGW Options	Cygwin and MinGW Options

D
	D	G++ and GCC
	Darwin options	Darwin Options
	`dcgettext`	Library Builtins
	`dd` integer suffix	Decimal Float
	`DD` integer suffix	Decimal Float
	deallocating variable length arrays	Variable Length
	debug dump options	Developer Options
	debugging GCC	Developer Options
	debugging information options	Debugging Options
	decimal floating types	Decimal Float
	declaration scope	Incompatibilities
	declarations inside expressions	Statement Exprs
	declarations, mixed with code	Mixed Labels and Declarations
	declaring attributes	Attributes
	declaring attributes of functions	Function Attributes
	declaring static data in C++	Static Definitions
	defining static data in C++	Static Definitions
	dependencies for make as output	Environment Variables
	dependencies for make as output	Environment Variables
	`DEPENDENCIES_OUTPUT`	Environment Variables
	dependencies, `make`	Preprocessor Options
	dependent name lookup	Name lookup
	`deprecated` enumerator attribute	Enumerator Attributes
	`deprecated` function attribute	Common Function Attributes
	`deprecated` type attribute	Common Type Attributes
	`deprecated` variable attribute	Common Variable Attributes
	designated initializers	Designated Inits
	`designated_init` type attribute	Common Type Attributes
	designator lists	Designated Inits
	designators	Designated Inits
	`destructor` function attribute	Common Function Attributes
	developer options	Developer Options
	`df` integer suffix	Decimal Float
	`DF` integer suffix	Decimal Float
	`dgettext`	Library Builtins
	diagnostic messages	Diagnostic Message Formatting Options
	dialect options	C Dialect Options
	`diff-delete GCC_COLORS capability`	Diagnostic Message Formatting Options
	`diff-filename GCC_COLORS capability`	Diagnostic Message Formatting Options
	`diff-hunk GCC_COLORS capability`	Diagnostic Message Formatting Options
	`diff-insert GCC_COLORS capability`	Diagnostic Message Formatting Options
	digits in constraint	Simple Constraints
	directory options	Directory Options
	`disinterrupt` function attribute, Epiphany	Epiphany Function Attributes
	`dl` integer suffix	Decimal Float
	`DL` integer suffix	Decimal Float
	`dllexport` function attribute	Microsoft Windows Function Attributes
	`dllexport` variable attribute	Microsoft Windows Variable Attributes
	`dllimport` function attribute	Microsoft Windows Function Attributes
	`dllimport` variable attribute	Microsoft Windows Variable Attributes
	dollar signs in identifier names	Dollar Signs
	double-word arithmetic	Long Long
	downward funargs	Nested Functions
	`drem`	Library Builtins
	`dremf`	Library Builtins
	`dreml`	Library Builtins
	dump options	Developer Options

E
	‘`E`’ in constraint	Simple Constraints
	earlyclobber operand	Modifiers
	eBPF Options	eBPF Options
	eight-bit data on the H8/300, H8/300H, and H8S	H8/300 Variable Attributes
	`eightbit_data` variable attribute, H8/300	H8/300 Variable Attributes
	`EIND`	AVR Options
	`either` function attribute, MSP430	MSP430 Function Attributes
	`either` variable attribute, MSP430	MSP430 Variable Attributes
	empty structures	Empty Structures
	`enum` extensions	Enum Extensions
	Enumerator Attributes	Enumerator Attributes
	environment variables	Environment Variables
	`erf`	Library Builtins
	`erfc`	Library Builtins
	`erfcf`	Library Builtins
	`erfcl`	Library Builtins
	`erff`	Library Builtins
	`erfl`	Library Builtins
	`error` function attribute	Common Function Attributes
	`error GCC_COLORS capability`	Diagnostic Message Formatting Options
	error messages	Warnings and Errors
	escaped newlines	Escaped Newlines
	`exception` function attribute	NDS32 Function Attributes
	exception handler functions, Blackfin	Blackfin Function Attributes
	exception handler functions, NDS32	NDS32 Function Attributes
	`exception_handler` function attribute	Blackfin Function Attributes
	`exit`	Library Builtins
	`exp`	Library Builtins
	`exp10`	Library Builtins
	`exp10f`	Library Builtins
	`exp10l`	Library Builtins
	`exp2`	Library Builtins
	`exp2f`	Library Builtins
	`exp2l`	Library Builtins
	`expected_throw` function attribute	Common Function Attributes
	`expf`	Library Builtins
	`expl`	Library Builtins
	explicit register variables	Explicit Register Variables
	`expm1`	Library Builtins
	`expm1f`	Library Builtins
	`expm1l`	Library Builtins
	expressions containing statements	Statement Exprs
	expressions, constructor	Compound Literals
	extended `asm`	Extended Asm
	extensible constraints	Simple Constraints
	extensions, `?:`	Conditionals
	extensions, C language	C Extensions
	extensions, C++ language	C++ Extensions
	external declaration scope	Incompatibilities
	`externally_visible` function attribute	Common Function Attributes
	extra NOP instructions at the function entry point	Common Function Attributes

F
	‘`F`’ in constraint	Simple Constraints
	`fabs`	Library Builtins
	`fabsf`	Library Builtins
	`fabsl`	Library Builtins
	`fallthrough` statement attribute	Statement Attributes
	`far` function attribute, MIPS	MIPS Function Attributes
	`fast_interrupt` function attribute, M32C	M32C Function Attributes
	`fast_interrupt` function attribute, MicroBlaze	MicroBlaze Function Attributes
	`fast_interrupt` function attribute, RX	RX Function Attributes
	`fastcall` function attribute, x86-32	x86 Function Attributes
	fatal signal	Bug Criteria
	`fd_arg` function attribute	Common Function Attributes
	`fd_arg_read` function attribute	Common Function Attributes
	`fd_arg_write` function attribute	Common Function Attributes
	`fdim`	Library Builtins
	`fdimf`	Library Builtins
	`fdiml`	Library Builtins
	FDL, GNU Free Documentation License	GNU Free Documentation License
	`fentry_name` function attribute, x86	x86 Function Attributes
	`fentry_section` function attribute, x86	x86 Function Attributes
	`ffs`	Library Builtins
	file name suffix	Overall Options
	file names	Link Options
	`fix-cortex-a53-835769` function attribute, AArch64	AArch64 Function Attributes
	fixed-point types	Fixed-Point
	`fixit-delete GCC_COLORS capability`	Diagnostic Message Formatting Options
	`fixit-insert GCC_COLORS capability`	Diagnostic Message Formatting Options
	`flag_enum` type attribute	Common Type Attributes
	`flatten` function attribute	Common Function Attributes
	flexible array members	Zero Length
	`float` as function value type	Incompatibilities
	floating point precision	Disappointments
	floating-point format builtins	Floating-Point Format Builtins
	`floor`	Library Builtins
	`floorf`	Library Builtins
	`floorl`	Library Builtins
	`fma`	Library Builtins
	`fmaf`	Library Builtins
	`fmal`	Library Builtins
	`fmax`	Library Builtins
	`fmaxf`	Library Builtins
	`fmaxl`	Library Builtins
	`fmin`	Library Builtins
	`fminf`	Library Builtins
	`fminl`	Library Builtins
	`fmod`	Library Builtins
	`fmodf`	Library Builtins
	`fmodl`	Library Builtins
	`fnname GCC_COLORS capability`	Diagnostic Message Formatting Options
	`force_align_arg_pointer` function attribute, x86	x86 Function Attributes
	`format` function attribute	Common Function Attributes
	`format_arg` function attribute	Common Function Attributes
	Fortran	G++ and GCC
	forward declaration of an `enum`	Enum Extensions
	`forwarder_section` function attribute, Epiphany	Epiphany Function Attributes
	forwarding calls	Constructing Calls
	`fprintf`	Library Builtins
	`fprintf_unlocked`	Library Builtins
	`fputs`	Library Builtins
	`fputs_unlocked`	Library Builtins
	FR30 Options	FR30 Options
	`free`	Library Builtins
	freestanding environment	Standards
	freestanding implementation	Standards
	`frexp`	Library Builtins
	`frexpf`	Library Builtins
	`frexpl`	Library Builtins
	FRV Options	FRV Options
	`fscanf`	Library Builtins
	`fscanf`, and constant strings	Incompatibilities
	FT32 Options	FT32 Options
	function addressability on the M32R/D	M32R/D Function Attributes
	function attributes	Function Attributes
	function pointers, arithmetic	Pointer Arith
	function prototype declarations	Function Prototypes
	function versions	Function Multiversioning
	`function_return` function attribute, x86	x86 Function Attributes
	`function_vector` function attribute, H8/300	H8/300 Function Attributes
	`function_vector` function attribute, M16C/M32C	M32C Function Attributes
	`function_vector` function attribute, SH	SH Function Attributes
	function, size of pointer to	Pointer Arith
	functions in arbitrary sections	Common Function Attributes
	functions that are dynamically resolved	Common Function Attributes
	functions that are passed arguments in registers on x86-32	x86 Function Attributes
	functions that behave like malloc	Common Function Attributes
	functions that have no side effects	Common Function Attributes
	functions that have no side effects	Common Function Attributes
	functions that have no side effects	Common Function Attributes
	functions that have no side effects	Common Function Attributes
	functions that never return	Common Function Attributes
	functions that pop the argument stack on x86-32	x86 Function Attributes
	functions that pop the argument stack on x86-32	x86 Function Attributes
	functions that pop the argument stack on x86-32	x86 Function Attributes
	functions that pop the argument stack on x86-32	x86 Function Attributes
	functions that return more than once	Common Function Attributes
	functions with non-null pointer arguments	Common Function Attributes
	functions with `printf`, `scanf`, `strftime` or `strfmon` style arguments	Common Function Attributes

G
	‘`G`’ in constraint	Simple Constraints
	‘`g`’ in constraint	Simple Constraints
	`g++`	Invoking G++
	G++	G++ and GCC
	`gamma`	Library Builtins
	`gamma_r`	Library Builtins
	`gammaf`	Library Builtins
	`gammaf_r`	Library Builtins
	`gammal`	Library Builtins
	`gammal_r`	Library Builtins
	GCC	G++ and GCC
	GCC command options	Invoking GCC
	`GCC_COLORS environment variable`	Diagnostic Message Formatting Options
	`GCC_COMPARE_DEBUG`	Environment Variables
	`GCC_DIAGNOSTICS_LOG`	Environment Variables
	`GCC_EXEC_PREFIX`	Environment Variables
	`GCC_EXTRA_DIAGNOSTIC_OUTPUT`	Environment Variables
	`gcc_struct` type attribute, PowerPC	PowerPC Type Attributes
	`gcc_struct` type attribute, x86	x86 Type Attributes
	`gcc_struct` variable attribute, PowerPC	PowerPC Variable Attributes
	`gcc_struct` variable attribute, x86	x86 Variable Attributes
	`GCC_URLS environment variable`	Diagnostic Message Formatting Options
	`gcov`	Instrumentation Options
	`general-regs-only` function attribute, AArch64	AArch64 Function Attributes
	`general-regs-only` function attribute, ARM	ARM Function Attributes
	`gettext`	Library Builtins
	global offset table	Code Gen Options
	global register after `longjmp`	Global Register Variables
	global register variables	Global Register Variables
	GNAT	G++ and GCC
	GNU attribute syntax	Attribute Syntax
	GNU attributes	Attributes
	GNU C Compiler	G++ and GCC
	GNU Compiler Collection	G++ and GCC
	`gnu_inline` function attribute	Common Function Attributes
	Go	G++ and GCC
	goto with computed label	Labels as Values
	`gprof`	Instrumentation Options
	grouping options	Invoking GCC

H
	‘`H`’ in constraint	Simple Constraints
	half-precision floating point	Half-Precision
	hard registers in constraint	Simple Constraints
	`hardbool` type attribute	Common Type Attributes
	hardware models and configurations, specifying	Submodel Options
	hex floats	Hex Floats
	`highlight-a GCC_COLORS capability`	Diagnostic Message Formatting Options
	`highlight-b GCC_COLORS capability`	Diagnostic Message Formatting Options
	highlight, color	Diagnostic Message Formatting Options
	`hk` fixed-suffix	Fixed-Point
	`HK` fixed-suffix	Fixed-Point
	hosted environment	Standards
	hosted environment	C Dialect Options
	hosted environment	C Dialect Options
	hosted implementation	Standards
	`hot` function attribute	Common Function Attributes
	`hot` label attribute	Label Attributes
	`hot` type attribute	C++ Attributes
	`hotpatch` function attribute, S/390	S/390 Function Attributes
	HPPA Options	HPPA Options
	`hr` fixed-suffix	Fixed-Point
	`HR` fixed-suffix	Fixed-Point
	huge value builtins	Floating-Point Format Builtins
	`hypot`	Library Builtins
	`hypotf`	Library Builtins
	`hypotl`	Library Builtins

I
	‘`i`’ in constraint	Simple Constraints
	‘`I`’ in constraint	Simple Constraints
	IA-64 Options	IA-64 Options
	IA64 atomic memory access builtins	__sync Builtins
	IBM RS/6000 and PowerPC Options	RS/6000 and PowerPC Options
	identifier names, dollar signs in	Dollar Signs
	identifiers, names in assembler code	Asm Labels
	`ifunc` function attribute	Common Function Attributes
	`ilogb`	Library Builtins
	`ilogbf`	Library Builtins
	`ilogbl`	Library Builtins
	`imaxabs`	Library Builtins
	implementation-defined behavior, C language	C Implementation
	implementation-defined behavior, C++ language	C++ Implementation
	implied `#pragma implementation`	C++ Interface
	incompatibilities of GCC	Incompatibilities
	incomplete `enum` types	Enum Extensions
	increment operators	Bug Criteria
	`index`	Library Builtins
	indirect calls, ARC	ARC Function Attributes
	indirect calls, ARM	ARM Function Attributes
	indirect calls, Blackfin	Blackfin Function Attributes
	indirect calls, Epiphany	Epiphany Function Attributes
	indirect calls, MIPS	MIPS Function Attributes
	indirect calls, PowerPC	PowerPC Function Attributes
	indirect functions	Common Function Attributes
	`indirect_branch` function attribute, x86	x86 Function Attributes
	`indirect_return` function attribute, AArch64	AArch64 Function Attributes
	`indirect_return` function attribute, x86	x86 Function Attributes
	infinity builtins	Floating-Point Format Builtins
	`init_priority` variable attribute	C++ Attributes
	initializations in expressions	Compound Literals
	initializers with labeled elements	Designated Inits
	initializers, non-constant	Initializers
	inline assembly language	Using Assembly Language with C
	`inline` automatic for C++ member fns	Inline
	inline functions	Inline
	inline functions, omission of	Inline
	inlining and C++ pragmas	C++ Interface
	installation trouble	Trouble
	instrumentation options	Instrumentation Options
	integer arithmetic overflow checking builtins	Integer Overflow Builtins
	integrating function code	Inline
	interface and implementation headers, C++	C++ Interface
	intermediate C version, nonexistent	G++ and GCC
	`interrupt` function attribute	Common Function Attributes
	`interrupt` function attribute, ARC	ARC Function Attributes
	`interrupt` function attribute, ARM	ARM Function Attributes
	`interrupt` function attribute, AVR	AVR Function Attributes
	`interrupt` function attribute, C-SKY	C-SKY Function Attributes
	`interrupt` function attribute, Epiphany	Epiphany Function Attributes
	`interrupt` function attribute, M32C	M32C Function Attributes
	`interrupt` function attribute, M32R/D	M32R/D Function Attributes
	`interrupt` function attribute, m68k	m68k Function Attributes
	`interrupt` function attribute, MIPS	MIPS Function Attributes
	`interrupt` function attribute, MSP430	MSP430 Function Attributes
	`interrupt` function attribute, NDS32	NDS32 Function Attributes
	`interrupt` function attribute, RISC-V	RISC-V Function Attributes
	`interrupt` function attribute, RL78	RL78 Function Attributes
	`interrupt` function attribute, RX	RX Function Attributes
	`interrupt` function attribute, V850	V850 Function Attributes
	`interrupt` function attribute, Visium	Visium Function Attributes
	`interrupt` function attribute, x86	x86 Function Attributes
	`interrupt` function attribute, Xstormy16	Xstormy16 Function Attributes
	`interrupt_handler` function attribute	Common Function Attributes
	`interrupt_handler` function attribute, Blackfin	Blackfin Function Attributes
	`interrupt_handler` function attribute, H8/300	H8/300 Function Attributes
	`interrupt_handler` function attribute, m68k	m68k Function Attributes
	`interrupt_handler` function attribute, MicroBlaze	MicroBlaze Function Attributes
	`interrupt_handler` function attribute, SH	SH Function Attributes
	`interrupt_handler` function attribute, V850	V850 Function Attributes
	`interrupt_thread` function attribute, fido	m68k Function Attributes
	`interrupt(num)` function attribute, AVR	AVR Function Attributes
	introduction	Top
	invalid assembly code	Bug Criteria
	`invalid GCC_COLORS capability`	Diagnostic Message Formatting Options
	invalid input	Bug Criteria
	invoking `g++`	Invoking G++
	`io` variable attribute, AVR	AVR Variable Attributes
	`io_low` variable attribute, AVR	AVR Variable Attributes
	`isalnum`	Library Builtins
	`isalpha`	Library Builtins
	`isascii`	Library Builtins
	`isblank`	Library Builtins
	`iscntrl`	Library Builtins
	`isdigit`	Library Builtins
	`isgraph`	Library Builtins
	`islower`	Library Builtins
	ISO 9899	Standards
	ISO C	Standards
	ISO C standard	Standards
	ISO C11	Standards
	ISO C17	Standards
	ISO C1X	Standards
	ISO C23	Standards
	ISO C2X	Standards
	ISO C2Y	Standards
	ISO C90	Standards
	ISO C94	Standards
	ISO C95	Standards
	ISO C99	Standards
	ISO C9X	Standards
	ISO support	C Dialect Options
	ISO/IEC 9899	Standards
	`isprint`	Library Builtins
	`ispunct`	Library Builtins
	`isr` function attribute, ARM	ARM Function Attributes
	`isr` function attribute, C-SKY	C-SKY Function Attributes
	`isspace`	Library Builtins
	`isupper`	Library Builtins
	`iswalnum`	Library Builtins
	`iswalpha`	Library Builtins
	`iswblank`	Library Builtins
	`iswcntrl`	Library Builtins
	`iswdigit`	Library Builtins
	`iswgraph`	Library Builtins
	`iswlower`	Library Builtins
	`iswprint`	Library Builtins
	`iswpunct`	Library Builtins
	`iswspace`	Library Builtins
	`iswupper`	Library Builtins
	`iswxdigit`	Library Builtins
	`isxdigit`	Library Builtins

J
	`j0`	Library Builtins
	`j0f`	Library Builtins
	`j0l`	Library Builtins
	`j1`	Library Builtins
	`j1f`	Library Builtins
	`j1l`	Library Builtins
	`jli_always` function attribute, ARC	ARC Function Attributes
	`jli_fixed` function attribute, ARC	ARC Function Attributes
	`jn`	Library Builtins
	`jnf`	Library Builtins
	`jnl`	Library Builtins

K
	`k` fixed-suffix	Fixed-Point
	`K` fixed-suffix	Fixed-Point
	`keep_interrupts_masked` function attribute, MIPS	MIPS Function Attributes
	`kernel` function attribute, Nvidia PTX	Nvidia PTX Function Attributes
	`kernel helper`, function attribute, BPF	BPF Function Attributes
	keywords, alternate	Alternate Keywords
	known causes of trouble	Trouble
	`kspisusp` function attribute, Blackfin	Blackfin Function Attributes

L
	`l1_data` variable attribute, Blackfin	Blackfin Variable Attributes
	`l1_data_A` variable attribute, Blackfin	Blackfin Variable Attributes
	`l1_data_B` variable attribute, Blackfin	Blackfin Variable Attributes
	`l1_text` function attribute, Blackfin	Blackfin Function Attributes
	`l2` function attribute, Blackfin	Blackfin Function Attributes
	`l2` variable attribute, Blackfin	Blackfin Variable Attributes
	Label Attributes	Label Attributes
	labeled elements in initializers	Designated Inits
	labels as values	Labels as Values
	`labs`	Library Builtins
	`LANG`	Environment Variables
	`LANG`	Environment Variables
	language dialect options	C Dialect Options
	`lasx` function attribute, LoongArch	LoongArch Function Attributes
	`LC_ALL`	Environment Variables
	`LC_CTYPE`	Environment Variables
	`LC_MESSAGES`	Environment Variables
	`ldexp`	Library Builtins
	`ldexpf`	Library Builtins
	`ldexpl`	Library Builtins
	`leaf` function attribute	Common Function Attributes
	legacy builtins for atomic memory access	__sync Builtins
	length-zero arrays	Zero Length
	`lgamma`	Library Builtins
	`lgamma_r`	Library Builtins
	`lgammaf`	Library Builtins
	`lgammaf_r`	Library Builtins
	`lgammal`	Library Builtins
	`lgammal_r`	Library Builtins
	Libraries	Link Options
	library function builtins	Library Builtins
	`LIBRARY_PATH`	Environment Variables
	link options	Link Options
	linker script	Link Options
	`lk` fixed-suffix	Fixed-Point
	`LK` fixed-suffix	Fixed-Point
	`LL` integer suffix	Long Long
	`llabs`	Library Builtins
	`llk` fixed-suffix	Fixed-Point
	`LLK` fixed-suffix	Fixed-Point
	`llr` fixed-suffix	Fixed-Point
	`LLR` fixed-suffix	Fixed-Point
	`llrint`	Library Builtins
	`llrintf`	Library Builtins
	`llrintl`	Library Builtins
	`llround`	Library Builtins
	`llroundf`	Library Builtins
	`llroundl`	Library Builtins
	LM32 options	LM32 Options
	load address instruction	Simple Constraints
	local labels	Local Labels
	local variables in macros	Typeof
	local variables, specifying registers	Local Register Variables
	locale	Environment Variables
	locale definition	Environment Variables
	`locus GCC_COLORS capability`	Diagnostic Message Formatting Options
	`log`	Library Builtins
	`log10`	Library Builtins
	`log10f`	Library Builtins
	`log10l`	Library Builtins
	`log1p`	Library Builtins
	`log1pf`	Library Builtins
	`log1pl`	Library Builtins
	`log2`	Library Builtins
	`log2f`	Library Builtins
	`log2l`	Library Builtins
	`logb`	Library Builtins
	`logbf`	Library Builtins
	`logbl`	Library Builtins
	`logf`	Library Builtins
	`logl`	Library Builtins
	`long long` data types	Long Long
	`long_call` function attribute, ARC	ARC Function Attributes
	`long_call` function attribute, ARM	ARM Function Attributes
	`long_call` function attribute, Epiphany	Epiphany Function Attributes
	`long_call` function attribute, MIPS	MIPS Function Attributes
	`longcall` function attribute, Blackfin	Blackfin Function Attributes
	`longcall` function attribute, PowerPC	PowerPC Function Attributes
	`longjmp`	Global Register Variables
	`longjmp` incompatibilities	Incompatibilities
	`longjmp` warnings	Warning Options
	LoongArch Options	LoongArch Options
	`lower` function attribute, MSP430	MSP430 Function Attributes
	`lower` variable attribute, MSP430	MSP430 Variable Attributes
	`lr` fixed-suffix	Fixed-Point
	`LR` fixed-suffix	Fixed-Point
	`lrint`	Library Builtins
	`lrintf`	Library Builtins
	`lrintl`	Library Builtins
	`lround`	Library Builtins
	`lroundf`	Library Builtins
	`lroundl`	Library Builtins
	`lsx` function attribute, LoongArch	LoongArch Function Attributes

M
	‘`m`’ in constraint	Simple Constraints
	M32C options	M32C Options
	M32R/D options	M32R/D Options
	M680x0 options	M680x0 Options
	machine specific constraints	Machine Constraints
	machine-dependent options	Submodel Options
	macro with variable arguments	Variadic Macros
	macros, inline alternative	Inline
	macros, local labels	Local Labels
	macros, local variables in	Typeof
	macros, statements in expressions	Statement Exprs
	macros, types of arguments	Typeof
	`make`	Preprocessor Options
	`malloc`	Library Builtins
	`malloc` function attribute	Common Function Attributes
	matching constraint	Simple Constraints
	`max-vectorization` function attribute, AArch64	AArch64 Function Attributes
	`may_alias` type attribute	Common Type Attributes
	MCore options	MCore Options
	`medium_call` function attribute, ARC	ARC Function Attributes
	member fns, automatically `inline`	Inline
	`memchr`	Library Builtins
	`memcmp`	Library Builtins
	`memcpy`	Library Builtins
	memory references in constraints	Simple Constraints
	`mempcpy`	Library Builtins
	`memset`	Library Builtins
	Mercury	G++ and GCC
	message formatting	Diagnostic Message Formatting Options
	messages, warning	Warning Options
	messages, warning and error	Warnings and Errors
	MicroBlaze Options	MicroBlaze Options
	`micromips` function attribute	MIPS Function Attributes
	Microsoft struct layout	Structure-Layout Pragmas
	middle-operands, omitted	Conditionals
	MIPS options	MIPS Options
	`mips16` function attribute, MIPS	MIPS Function Attributes
	misunderstandings in C++	C++ Misunderstandings
	mixed declarations and code	Mixed Labels and Declarations
	mixing assembly language and C	Using Assembly Language with C
	`mktemp`, and constant strings	Incompatibilities
	MMIX Options	MMIX Options
	MN10300 options	MN10300 Options
	`mode` type attribute	Common Type Attributes
	`mode` variable attribute	Common Variable Attributes
	`model` function attribute, M32R/D	M32R/D Function Attributes
	`model` variable attribute, IA-64	IA-64 Variable Attributes
	`model` variable attribute, LoongArch	LoongArch Variable Attributes
	`model-name` variable attribute, M32R/D	M32R/D Variable Attributes
	`modf`	Library Builtins
	`modff`	Library Builtins
	`modfl`	Library Builtins
	modifiers in constraints	Modifiers
	Moxie Options	Moxie Options
	`ms_abi` function attribute, x86	x86 Function Attributes
	`ms_hook_prologue` function attribute, x86	x86 Function Attributes
	ms_struct pragma	Structure-Layout Pragmas
	`ms_struct` type attribute, PowerPC	PowerPC Type Attributes
	`ms_struct` type attribute, x86	x86 Type Attributes
	`ms_struct` variable attribute, PowerPC	PowerPC Variable Attributes
	`ms_struct` variable attribute, x86	x86 Variable Attributes
	MSP430 Options	MSP430 Options
	multiple alternative constraints	Multi-Alternative
	multiprecision arithmetic	Long Long
	`musttail` statement attribute	Statement Attributes

N
	‘`n`’ in constraint	Simple Constraints
	`naked` function attribute, ARC	ARC Function Attributes
	`naked` function attribute, ARM	ARM Function Attributes
	`naked` function attribute, AVR	AVR Function Attributes
	`naked` function attribute, BPF	BPF Function Attributes
	`naked` function attribute, C-SKY	C-SKY Function Attributes
	`naked` function attribute, MCORE	MCORE Function Attributes
	`naked` function attribute, MSP430	MSP430 Function Attributes
	`naked` function attribute, NDS32	NDS32 Function Attributes
	`naked` function attribute, RISC-V	RISC-V Function Attributes
	`naked` function attribute, RL78	RL78 Function Attributes
	`naked` function attribute, RX	RX Function Attributes
	`naked` function attribute, x86	x86 Function Attributes
	Named Address Spaces	Named Address Spaces
	names used in assembler code	Asm Labels
	naming convention, implementation headers	C++ Interface
	NaN builtins	Floating-Point Format Builtins
	NDS32 Options	NDS32 Options
	`near` function attribute, MIPS	MIPS Function Attributes
	`nearbyint`	Library Builtins
	`nearbyintf`	Library Builtins
	`nearbyintl`	Library Builtins
	`nested` function attribute, NDS32	NDS32 Function Attributes
	nested functions	Nested Functions
	`nested_ready` function attribute, NDS32	NDS32 Function Attributes
	`nesting` function attribute, Blackfin	Blackfin Function Attributes
	`new` and `delete` builtins	New/Delete Builtins
	newlines (escaped)	Escaped Newlines
	`nextafter`	Library Builtins
	`nextafterf`	Library Builtins
	`nextafterl`	Library Builtins
	`nexttoward`	Library Builtins
	`nexttowardf`	Library Builtins
	`nexttowardl`	Library Builtins
	NFC	Warning Options
	NFKC	Warning Options
	`nmi` function attribute, NDS32	NDS32 Function Attributes
	NMI handler functions on the Blackfin processor	Blackfin Function Attributes
	`nmi_handler` function attribute, Blackfin	Blackfin Function Attributes
	`no_callee_saved_registers` function attribute, x86	x86 Function Attributes
	`no_caller_saved_registers` function attribute, x86	x86 Function Attributes
	`no_dangling` function attribute	C++ Attributes
	`no_dangling` type attribute	C++ Attributes
	`no_gccisr` function attribute, AVR	AVR Function Attributes
	`no_icf` function attribute	Common Function Attributes
	`no_icf` variable attribute	Common Variable Attributes
	`no_instrument_function` function attribute	Common Function Attributes
	`no_profile_instrument_function` function attribute	Common Function Attributes
	`no_reorder` function attribute	Common Function Attributes
	`no_sanitize` function attribute	Common Function Attributes
	`no_sanitize_address` function attribute	Common Function Attributes
	`no_sanitize_coverage` function attribute	Common Function Attributes
	`no_sanitize_thread` function attribute	Common Function Attributes
	`no_sanitize_undefined` function attribute	Common Function Attributes
	`no_split_stack` function attribute	Common Function Attributes
	`no_stack_limit` function attribute	Common Function Attributes
	`no_stack_protector` function attribute	Common Function Attributes
	`noblock` function attribute, AVR	AVR Function Attributes
	`nocf_check` function attribute	x86 Function Attributes
	`noclone` function attribute	Common Function Attributes
	`nocommon` variable attribute	Common Variable Attributes
	`nocompression` function attribute, MIPS	MIPS Function Attributes
	`nodirect_extern_access` function attribute	x86 Function Attributes
	`noinit` variable attribute	Common Variable Attributes
	`noinline` function attribute	Common Function Attributes
	`noipa` function attribute	Common Function Attributes
	`nomicromips` function attribute	MIPS Function Attributes
	`nomips16` function attribute, MIPS	MIPS Function Attributes
	non-constant initializers	Initializers
	non-static inline function	Inline
	nonlocal gotos	Nonlocal Gotos
	`nonnull` function attribute	Common Function Attributes
	`nonnull_if_nonzero` function attribute	Common Function Attributes
	`nonstring` variable attribute	Common Variable Attributes
	`noplt` function attribute	Common Function Attributes
	`noreturn` function attribute	Common Function Attributes
	`nosave_low_regs` function attribute, SH	SH Function Attributes
	`not_nested` function attribute, NDS32	NDS32 Function Attributes
	`note GCC_COLORS capability`	Diagnostic Message Formatting Options
	`nothrow` function attribute	Common Function Attributes
	`notshared` type attribute, ARM	ARM Type Attributes
	`null_terminated_string_arg` function attribute	Common Function Attributes
	number of elements	_Countof
	numeric builtins	Numeric Builtins
	Nvidia PTX options	Nvidia PTX Options
	nvptx options	Nvidia PTX Options

O
	‘`o`’ in constraint	Simple Constraints
	`OBJC_INCLUDE_PATH`	Environment Variables
	`objc_nullability` variable attribute	Common Variable Attributes
	`objc_root_class` type attribute	Common Type Attributes
	Objective-C	G++ and GCC
	Objective-C	Standards
	Objective-C and Objective-C++ options, command-line	Objective-C and Objective-C++ Dialect Options
	Objective-C++	G++ and GCC
	Objective-C++	Standards
	Offloading options	OpenMP and OpenACC Options
	Offloading targets	OpenMP and OpenACC Options
	offsettable address	Simple Constraints
	old-style function definitions	Function Prototypes
	`omit-leaf-frame-pointer` function attribute, AArch64	AArch64 Function Attributes
	omitted middle-operands	Conditionals
	opaque `enum` types	Enum Extensions
	open coding	Inline
	OpenACC accelerator programming	OpenMP and OpenACC Options
	OpenACC accelerator programming	Warning Options
	OpenACC extension support	OpenACC
	OpenACC offloading options	OpenMP and OpenACC Options
	OpenACC offloading targets	OpenMP and OpenACC Options
	OpenACC options	OpenMP and OpenACC Options
	OpenMP extension support	OpenMP
	OpenMP offloading options	OpenMP and OpenACC Options
	OpenMP offloading targets	OpenMP and OpenACC Options
	OpenMP options	OpenMP and OpenACC Options
	OpenMP parallel	OpenMP and OpenACC Options
	OpenMP SIMD	OpenMP and OpenACC Options
	OpenMP target SIMD clone	OpenMP and OpenACC Options
	OpenRISC Options	OpenRISC Options
	operand constraints, `asm`	Constraints
	`optimize` function attribute	Common Function Attributes
	optimize options	Optimize Options
	Options for Cygwin and MinGW	Cygwin and MinGW Options
	options to control diagnostics formatting	Diagnostic Message Formatting Options
	options to control warnings	Warning Options
	options, C++	C++ Dialect Options
	options, code generation	Code Gen Options
	options, debugging	Debugging Options
	options, dialect	C Dialect Options
	options, directory search	Directory Options
	options, GCC command	Invoking GCC
	options, grouping	Invoking GCC
	options, linking	Link Options
	options, Objective-C and Objective-C++	Objective-C and Objective-C++ Dialect Options
	options, optimization	Optimize Options
	options, order	Invoking GCC
	options, preprocessor	Preprocessor Options
	options, profiling	Instrumentation Options
	options, program instrumentation	Instrumentation Options
	options, run-time error checking	Instrumentation Options
	order of evaluation, side effects	Non-bugs
	order of options	Invoking GCC
	`OS_main` function attribute, AVR	AVR Function Attributes
	`OS_task` function attribute, AVR	AVR Function Attributes
	other register constraints	Simple Constraints
	`outline-atomics` function attribute, AArch64	AArch64 Function Attributes
	output file option	Overall Options
	overflow checking builtins	Integer Overflow Builtins
	overloaded virtual function, warning	C++ Dialect Options

P
	‘`p`’ in constraint	Simple Constraints
	pack pragma	Structure-Layout Pragmas
	`packed` type attribute	Common Type Attributes
	`packed` variable attribute	Common Variable Attributes
	parameter forward declaration	Variable Length
	`partial_save` function attribute, NDS32	NDS32 Function Attributes
	`patchable_function_entry` function attribute	Common Function Attributes
	`path GCC_COLORS capability`	Diagnostic Message Formatting Options
	`pcs` function attribute, ARM	ARM Function Attributes
	PDP-11 Options	PDP-11 Options
	`persistent` variable attribute	Common Variable Attributes
	PIC	Code Gen Options
	pmf	Bound member functions
	pointer arguments	Common Function Attributes
	pointer arguments in variadic functions	Variadic Pointer Args
	pointer to member function	Bound member functions
	pointers to arrays	Pointers to Arrays
	portions of temporary objects, pointers to	Temporaries
	`pow`	Library Builtins
	`pow10`	Library Builtins
	`pow10f`	Library Builtins
	`pow10l`	Library Builtins
	PowerPC options	PowerPC Options
	`powf`	Library Builtins
	`powl`	Library Builtins
	pragma GCC ivdep	Loop-Specific Pragmas
	pragma GCC novector	Loop-Specific Pragmas
	pragma GCC optimize	Function Specific Option Pragmas
	pragma GCC pop_options	Function Specific Option Pragmas
	pragma GCC push_options	Function Specific Option Pragmas
	pragma GCC reset_options	Function Specific Option Pragmas
	pragma GCC target	Function Specific Option Pragmas
	pragma GCC unroll `n`	Loop-Specific Pragmas
	pragma, address	M32C Pragmas
	pragma, align	Solaris Pragmas
	pragma, ctable_entry	PRU Pragmas
	pragma, diagnostic	Diagnostic Pragmas
	pragma, diagnostic	Diagnostic Pragmas
	pragma, diagnostic	Diagnostic Pragmas
	pragma, diagnostic	Diagnostic Pragmas
	pragma, fini	Solaris Pragmas
	pragma, init	Solaris Pragmas
	pragma, long_calls	ARM Pragmas
	pragma, long_calls_off	ARM Pragmas
	pragma, longcall	RS/6000 and PowerPC Pragmas
	pragma, mark	Darwin Pragmas
	pragma, memregs	M32C Pragmas
	pragma, ms_struct	Structure-Layout Pragmas
	pragma, no_long_calls	ARM Pragmas
	pragma, options align	Darwin Pragmas
	pragma, pack	Structure-Layout Pragmas
	pragma, pop_macro	Push/Pop Macro Pragmas
	pragma, push_macro	Push/Pop Macro Pragmas
	pragma, redefine_extname	Symbol-Renaming Pragmas
	pragma, scalar_storage_order	Structure-Layout Pragmas
	pragma, segment	Darwin Pragmas
	pragma, unused	Darwin Pragmas
	pragma, visibility	Visibility Pragmas
	pragma, weak	Weak Pragmas
	pragmas	Pragmas
	pragmas in C++, effect on inlining	C++ Interface
	pragmas, interface and implementation	C++ Interface
	pragmas, warning of unknown	Warning Options
	precompiled headers	Precompiled Headers
	`prefer-vector-width` function attribute, x86	x86 Function Attributes
	preprocessing numbers	Incompatibilities
	preprocessing tokens	Incompatibilities
	preprocessor options	Preprocessor Options
	`preserve_access_index` type attribute, BPF	BPF Type Attributes
	`preserve_none` function attribute, x86	x86 Function Attributes
	`printf`	Library Builtins
	`printf_unlocked`	Library Builtins
	`prof`	Instrumentation Options
	profiling options	Instrumentation Options
	`progmem` variable attribute, AVR	AVR Variable Attributes
	program instrumentation options	Instrumentation Options
	promotion of formal parameters	Function Prototypes
	PRU Options	PRU Options
	`pure` function attribute	Common Function Attributes
	push address instruction	Simple Constraints
	`putchar`	Library Builtins
	`puts`	Library Builtins

Q
	`q` floating point suffix	Floating Types
	`Q` floating point suffix	Floating Types
	`qsort`, and global register variables	Global Register Variables
	`quote GCC_COLORS capability`	Diagnostic Message Formatting Options

R
	`r` fixed-suffix	Fixed-Point
	`R` fixed-suffix	Fixed-Point
	‘`r`’ in constraint	Simple Constraints
	`RAMPD`	AVR Options
	`RAMPX`	AVR Options
	`RAMPY`	AVR Options
	`RAMPZ`	AVR Options
	`range1 GCC_COLORS capability`	Diagnostic Message Formatting Options
	`range2 GCC_COLORS capability`	Diagnostic Message Formatting Options
	ranges in case statements	Case Ranges
	raw string literals	Raw String Literals
	read-only strings	Incompatibilities
	`realloc`	Library Builtins
	`reentrant` function attribute, MSP430	MSP430 Function Attributes
	register variable after `longjmp`	Global Register Variables
	registers for local variables	Local Register Variables
	registers in constraints	Simple Constraints
	registers, global allocation	Global Register Variables
	registers, global variables in	Global Register Variables
	`regparm` function attribute, x86	x86 Function Attributes
	relocation truncated to fit (ColdFire)	M680x0 Options
	relocation truncated to fit (MIPS)	MIPS Options
	`remainder`	Library Builtins
	`remainderf`	Library Builtins
	`remainderl`	Library Builtins
	`remquo`	Library Builtins
	`remquof`	Library Builtins
	`remquol`	Library Builtins
	`renesas` function attribute, SH	SH Function Attributes
	reordering, warning	C++ Dialect Options
	reporting bugs	Bugs
	`reproducible` function type attribute	Common Function Attributes
	`resbank` function attribute, SH	SH Function Attributes
	`reset` function attribute, NDS32	NDS32 Function Attributes
	reset handler functions	NDS32 Function Attributes
	rest argument (in macro)	Variadic Macros
	restricted pointers	Restricted Pointers
	restricted references	Restricted Pointers
	restricted this pointer	Restricted Pointers
	`retain` function attribute	Common Function Attributes
	`retain` variable attribute	Common Variable Attributes
	`returns_nonnull` function attribute	Common Function Attributes
	`returns_twice` function attribute	Common Function Attributes
	`rindex`	Library Builtins
	`rint`	Library Builtins
	`rintf`	Library Builtins
	`rintl`	Library Builtins
	RISC-V Options	RISC-V Options
	`riscv_vector_cc` function attribute, RISC-V	RISC-V Function Attributes
	RL78 Options	RL78 Options
	`round`	Library Builtins
	`roundf`	Library Builtins
	`roundl`	Library Builtins
	RS/6000 and PowerPC Options	RS/6000 and PowerPC Options
	RTTI	Vague Linkage
	run-time error checking options	Instrumentation Options
	run-time options	Code Gen Options
	RX Options	RX Options

S
	‘`s`’ in constraint	Simple Constraints
	S/390 and zSeries Options	S/390 and zSeries Options
	`saddr` variable attribute, RL78	RL78 Variable Attributes
	save all registers on the Blackfin	Blackfin Function Attributes
	save all registers on the H8/300, H8/300H, and H8S	H8/300 Function Attributes
	`save_all` function attribute, NDS32	NDS32 Function Attributes
	`save_volatiles` function attribute, MicroBlaze	MicroBlaze Function Attributes
	`saveall` function attribute, Blackfin	Blackfin Function Attributes
	`saveall` function attribute, H8/300	H8/300 Function Attributes
	`scalar_storage_order` type attribute	Common Type Attributes
	`scalb`	Library Builtins
	`scalbf`	Library Builtins
	`scalbl`	Library Builtins
	`scalbln`	Library Builtins
	`scalblnf`	Library Builtins
	`scalblnf`	Library Builtins
	`scalbn`	Library Builtins
	`scalbnf`	Library Builtins
	`scanf`, and constant strings	Incompatibilities
	`scanfnl`	Library Builtins
	scope of a variable length array	Variable Length
	scope of declaration	Disappointments
	scope of external declarations	Incompatibilities
	`sda` variable attribute, V850	V850 Variable Attributes
	search path	Directory Options
	`section` function attribute	Common Function Attributes
	`section` variable attribute	Common Variable Attributes
	`secure_call` function attribute, ARC	ARC Function Attributes
	`selectany` variable attribute	Microsoft Windows Variable Attributes
	`sentinel` function attribute	Common Function Attributes
	`setjmp`	Global Register Variables
	`setjmp` incompatibilities	Incompatibilities
	shared strings	Incompatibilities
	`shared` variable attribute	Microsoft Windows Variable Attributes
	`shared` variable attribute, Nvidia PTX	Nvidia PTX Variable Attributes
	`short_call` function attribute, ARC	ARC Function Attributes
	`short_call` function attribute, ARM	ARM Function Attributes
	`short_call` function attribute, Epiphany	Epiphany Function Attributes
	`short_call` function attribute, MIPS	MIPS Function Attributes
	`shortcall` function attribute, Blackfin	Blackfin Function Attributes
	`shortcall` function attribute, PowerPC	PowerPC Function Attributes
	side effect in `?:`	Conditionals
	side effects, macro argument	Statement Exprs
	side effects, order of evaluation	Non-bugs
	`sign-return-address` function attribute, AArch64	AArch64 Function Attributes
	`signal` function attribute, AVR	AVR Function Attributes
	`signal(num)` function attribute, AVR	AVR Function Attributes
	`signbit`	Library Builtins
	`signbitd128`	Library Builtins
	`signbitd32`	Library Builtins
	`signbitd64`	Library Builtins
	`signbitf`	Library Builtins
	`signbitl`	Library Builtins
	signed and unsigned values, comparison warning	Warning Options
	`significand`	Library Builtins
	`significandf`	Library Builtins
	`significandl`	Library Builtins
	SIMD	OpenMP and OpenACC Options
	`simd` function attribute	Common Function Attributes
	simple constraints	Simple Constraints
	`sin`	Library Builtins
	`sincos`	Library Builtins
	`sincosf`	Library Builtins
	`sincosl`	Library Builtins
	`sinf`	Library Builtins
	`sinh`	Library Builtins
	`sinhf`	Library Builtins
	`sinhl`	Library Builtins
	`sinl`	Library Builtins
	`sinpi`	Library Builtins
	`sinpif`	Library Builtins
	`sinpil`	Library Builtins
	`sizeof`	Typeof
	smaller data references	M32R/D Options
	smaller data references (PowerPC)	RS/6000 and PowerPC Options
	`snprintf`	Library Builtins
	Solaris 2 options	Solaris 2 Options
	`SOURCE_DATE_EPOCH`	Environment Variables
	`sp_switch` function attribute, SH	SH Function Attributes
	SPARC options	SPARC Options
	Spec Files	Spec Files
	specified registers	Explicit Register Variables
	specifying compiler version and target machine	Invoking GCC
	specifying hardware config	Submodel Options
	specifying machine version	Invoking GCC
	specifying registers for local variables	Local Register Variables
	speed of compilation	Precompiled Headers
	speed of compilation	C++ Modules
	`sprintf`	Library Builtins
	`sqrt`	Library Builtins
	`sqrtf`	Library Builtins
	`sqrtl`	Library Builtins
	`sscanf`	Library Builtins
	`sscanf`, and constant strings	Incompatibilities
	`sseregparm` function attribute, x86	x86 Function Attributes
	stack allocation builtins	Stack Allocation
	`stack_protect` function attribute	Common Function Attributes
	standard attribute syntax	Attribute Syntax
	Statement Attributes	Statement Attributes
	statements inside expressions	Statement Exprs
	static data in C++, declaring and defining	Static Definitions
	`stdcall` function attribute, x86-32	x86 Function Attributes
	`stpcpy`	Library Builtins
	`stpncpy`	Library Builtins
	`strcasecmp`	Library Builtins
	`strcat`	Library Builtins
	`strchr`	Library Builtins
	`strcmp`	Library Builtins
	`strcpy`	Library Builtins
	`strcspn`	Library Builtins
	`strdup`	Library Builtins
	`strfmon`	Library Builtins
	`strftime`	Library Builtins
	`strict_flex_array` variable attribute	Common Variable Attributes
	`strict-align` function attribute, AArch64	AArch64 Function Attributes
	`strict-align` function attribute, LoongArch	LoongArch Function Attributes
	string constants	Incompatibilities
	string literals, raw	Raw String Literals
	`strlen`	Library Builtins
	`strncasecmp`	Library Builtins
	`strncat`	Library Builtins
	`strncmp`	Library Builtins
	`strncpy`	Library Builtins
	`strndup`	Library Builtins
	`strnlen`	Library Builtins
	`strpbrk`	Library Builtins
	`strrchr`	Library Builtins
	`strspn`	Library Builtins
	`strstr`	Library Builtins
	strub eligibility and viability	Common Type Attributes
	`strub` type attribute	Common Type Attributes
	`struct`	Unnamed Fields
	`struct __htm_tdb`	S/390 System z Built-in Functions
	structures	Incompatibilities
	structures with only FAMs	Flexible Array Members alone in Structures
	structures with only flexible array members	Flexible Array Members alone in Structures
	structures, constructor expression	Compound Literals
	submodel options	Submodel Options
	subscripting	Subscripting
	subscripting and function values	Subscripting
	suffixes for C++ source	Invoking G++
	`SUNPRO_DEPENDENCIES`	Environment Variables
	suppressing warnings	Warning Options
	surprises in C++	C++ Misunderstandings
	`symver` function attribute	Common Function Attributes
	syntax checking	Warning Options
	`syscall_linkage` function attribute, IA-64	IA-64 Function Attributes
	system headers, warnings from	Warning Options
	`sysv_abi` function attribute, x86	x86 Function Attributes

T
	`tainted_args` function attribute	Common Function Attributes
	`tan`	Library Builtins
	`tanf`	Library Builtins
	`tanh`	Library Builtins
	`tanhf`	Library Builtins
	`tanhl`	Library Builtins
	`tanl`	Library Builtins
	`tanpi`	Library Builtins
	`tanpif`	Library Builtins
	`tanpil`	Library Builtins
	`target` function attribute	Common Function Attributes
	`target` function attribute	ARM Function Attributes
	`target` function attribute	PowerPC Function Attributes
	`target` function attribute	S/390 Function Attributes
	`target` function attribute	x86 Function Attributes
	target machine, specifying	Invoking GCC
	`target_clones` function attribute	Common Function Attributes
	target-dependent options	Submodel Options
	`target("3dnow")` function attribute, x86	x86 Function Attributes
	`target("3dnowa")` function attribute, x86	x86 Function Attributes
	`target("80387")` function attribute, x86	x86 Function Attributes
	`target("abm")` function attribute, x86	x86 Function Attributes
	`target("adx")` function attribute, x86	x86 Function Attributes
	`target("aes")` function attribute, x86	x86 Function Attributes
	`target("align-stringops")` function attribute, x86	x86 Function Attributes
	`target("altivec")` function attribute, PowerPC	PowerPC Function Attributes
	`target("amx-avx512")` function attribute, x86	x86 Function Attributes
	`target("amx-bf16")` function attribute, x86	x86 Function Attributes
	`target("amx-complex")` function attribute, x86	x86 Function Attributes
	`target("amx-fp16")` function attribute, x86	x86 Function Attributes
	`target("amx-fp8")` function attribute, x86	x86 Function Attributes
	`target("amx-int8")` function attribute, x86	x86 Function Attributes
	`target("amx-movrs")` function attribute, x86	x86 Function Attributes
	`target("amx-tf32")` function attribute, x86	x86 Function Attributes
	`target("amx-tile")` function attribute, x86	x86 Function Attributes
	`target("amx-transpose")` function attribute, x86	x86 Function Attributes
	`target("apxf")` function attribute, x86	x86 Function Attributes
	`target("arch=ARCH")` function attribute, x86	x86 Function Attributes
	`target("arm")` function attribute, ARM	ARM Function Attributes
	`target("avoid-indexed-addresses")` function attribute, PowerPC	PowerPC Function Attributes
	`target("avx")` function attribute, x86	x86 Function Attributes
	`target("avx10.1")` function attribute, x86	x86 Function Attributes
	`target("avx10.2")` function attribute, x86	x86 Function Attributes
	`target("avx2")` function attribute, x86	x86 Function Attributes
	`target("avx512bitalg")` function attribute, x86	x86 Function Attributes
	`target("avx512bw")` function attribute, x86	x86 Function Attributes
	`target("avx512cd")` function attribute, x86	x86 Function Attributes
	`target("avx512dq")` function attribute, x86	x86 Function Attributes
	`target("avx512er")` function attribute, x86	x86 Function Attributes
	`target("avx512f")` function attribute, x86	x86 Function Attributes
	`target("avx512ifma")` function attribute, x86	x86 Function Attributes
	`target("avx512vbmi")` function attribute, x86	x86 Function Attributes
	`target("avx512vbmi2")` function attribute, x86	x86 Function Attributes
	`target("avx512vl")` function attribute, x86	x86 Function Attributes
	`target("avx512vnni")` function attribute, x86	x86 Function Attributes
	`target("avx512vpopcntdq")` function attribute, x86	x86 Function Attributes
	`target("avxifma")` function attribute, x86	x86 Function Attributes
	`target("avxneconvert")` function attribute, x86	x86 Function Attributes
	`target("avxvnni")` function attribute, x86	x86 Function Attributes
	`target("avxvnniint16")` function attribute, x86	x86 Function Attributes
	`target("avxvnniint8")` function attribute, x86	x86 Function Attributes
	`target("bmi")` function attribute, x86	x86 Function Attributes
	`target("bmi2")` function attribute, x86	x86 Function Attributes
	`target("cld")` function attribute, x86	x86 Function Attributes
	`target("cldemote")` function attribute, x86	x86 Function Attributes
	`target("clflushopt")` function attribute, x86	x86 Function Attributes
	`target("clwb")` function attribute, x86	x86 Function Attributes
	`target("clzero")` function attribute, x86	x86 Function Attributes
	`target("cmpb")` function attribute, PowerPC	PowerPC Function Attributes
	`target("cmpccxadd")` function attribute, x86	x86 Function Attributes
	`target("cpu=CPU")` function attribute, PowerPC	PowerPC Function Attributes
	`target("crc32")` function attribute, x86	x86 Function Attributes
	`target("cx16")` function attribute, x86	x86 Function Attributes
	`target("default")` function attribute, x86	x86 Function Attributes
	`target("dlmzb")` function attribute, PowerPC	PowerPC Function Attributes
	`target("f16c")` function attribute, x86	x86 Function Attributes
	`target("fancy-math-387")` function attribute, x86	x86 Function Attributes
	`target("fma")` function attribute, x86	x86 Function Attributes
	`target("fma4")` function attribute, x86	x86 Function Attributes
	`target("fpmath=FPMATH")` function attribute, x86	x86 Function Attributes
	`target("fprnd")` function attribute, PowerPC	PowerPC Function Attributes
	`target("fpu=")` function attribute, ARM	ARM Function Attributes
	`target("friz")` function attribute, PowerPC	PowerPC Function Attributes
	`target("fsgsbase")` function attribute, x86	x86 Function Attributes
	`target("fxsr")` function attribute, x86	x86 Function Attributes
	`target("general-regs-only")` function attribute, x86	x86 Function Attributes
	`target("gfni")` function attribute, x86	x86 Function Attributes
	`target("hard-dfp")` function attribute, PowerPC	PowerPC Function Attributes
	`target("hle")` function attribute, x86	x86 Function Attributes
	`target("hreset")` function attribute, x86	x86 Function Attributes
	`target("ieee-fp")` function attribute, x86	x86 Function Attributes
	`target("inline-all-stringops")` function attribute, x86	x86 Function Attributes
	`target("inline-stringops-dynamically")` function attribute, x86	x86 Function Attributes
	`target("isel")` function attribute, PowerPC	PowerPC Function Attributes
	`target("kl")` function attribute, x86	x86 Function Attributes
	`target("longcall")` function attribute, PowerPC	PowerPC Function Attributes
	`target("lwp")` function attribute, x86	x86 Function Attributes
	`target("lzcnt")` function attribute, x86	x86 Function Attributes
	`target("mfcrf")` function attribute, PowerPC	PowerPC Function Attributes
	`target("mmx")` function attribute, x86	x86 Function Attributes
	`target("movbe")` function attribute, x86	x86 Function Attributes
	`target("movdir64b")` function attribute, x86	x86 Function Attributes
	`target("movdiri")` function attribute, x86	x86 Function Attributes
	`target("movrs")` function attribute, x86	x86 Function Attributes
	`target("mulhw")` function attribute, PowerPC	PowerPC Function Attributes
	`target("multiple")` function attribute, PowerPC	PowerPC Function Attributes
	`target("mwait")` function attribute, x86	x86 Function Attributes
	`target("mwaitx")` function attribute, x86	x86 Function Attributes
	`target("paired")` function attribute, PowerPC	PowerPC Function Attributes
	`target("pclmul")` function attribute, x86	x86 Function Attributes
	`target("pconfig")` function attribute, x86	x86 Function Attributes
	`target("pku")` function attribute, x86	x86 Function Attributes
	`target("popcnt")` function attribute, x86	x86 Function Attributes
	`target("popcntb")` function attribute, PowerPC	PowerPC Function Attributes
	`target("popcntd")` function attribute, PowerPC	PowerPC Function Attributes
	`target("powerpc-gfxopt")` function attribute, PowerPC	PowerPC Function Attributes
	`target("powerpc-gpopt")` function attribute, PowerPC	PowerPC Function Attributes
	`target("prefetchi")` function attribute, x86	x86 Function Attributes
	`target("prfchw")` function attribute, x86	x86 Function Attributes
	`target("ptwrite")` function attribute, x86	x86 Function Attributes
	`target("raoint")` function attribute, x86	x86 Function Attributes
	`target("rdpid")` function attribute, x86	x86 Function Attributes
	`target("rdrnd")` function attribute, x86	x86 Function Attributes
	`target("rdseed")` function attribute, x86	x86 Function Attributes
	`target("recip-precision")` function attribute, PowerPC	PowerPC Function Attributes
	`target("recip")` function attribute, x86	x86 Function Attributes
	`target("rtm")` function attribute, x86	x86 Function Attributes
	`target("sahf")` function attribute, x86	x86 Function Attributes
	`target("sgx")` function attribute, x86	x86 Function Attributes
	`target("sha")` function attribute, x86	x86 Function Attributes
	`target("sha512")` function attribute, x86	x86 Function Attributes
	`target("shstk")` function attribute, x86	x86 Function Attributes
	`target("sm3")` function attribute, x86	x86 Function Attributes
	`target("sm4")` function attribute, x86	x86 Function Attributes
	`target("sse")` function attribute, x86	x86 Function Attributes
	`target("sse2")` function attribute, x86	x86 Function Attributes
	`target("sse3")` function attribute, x86	x86 Function Attributes
	`target("sse4.1")` function attribute, x86	x86 Function Attributes
	`target("sse4.2")` function attribute, x86	x86 Function Attributes
	`target("sse4")` function attribute, x86	x86 Function Attributes
	`target("sse4a")` function attribute, x86	x86 Function Attributes
	`target("ssse3")` function attribute, x86	x86 Function Attributes
	`target("string")` function attribute, PowerPC	PowerPC Function Attributes
	`target("tbm")` function attribute, x86	x86 Function Attributes
	`target("thumb")` function attribute, ARM	ARM Function Attributes
	`target("tune=TUNE")` function attribute, PowerPC	PowerPC Function Attributes
	`target("tune=TUNE")` function attribute, x86	x86 Function Attributes
	`target("uintr")` function attribute, x86	x86 Function Attributes
	`target("update")` function attribute, PowerPC	PowerPC Function Attributes
	`target("usermsr")` function attribute, x86	x86 Function Attributes
	`target("vaes")` function attribute, x86	x86 Function Attributes
	`target("vpclmulqdq")` function attribute, x86	x86 Function Attributes
	`target("vsx")` function attribute, PowerPC	PowerPC Function Attributes
	`target("waitpkg")` function attribute, x86	x86 Function Attributes
	`target("wbnoinvd")` function attribute, x86	x86 Function Attributes
	`target("widekl")` function attribute, x86	x86 Function Attributes
	`target("xop")` function attribute, x86	x86 Function Attributes
	`target("xsave")` function attribute, x86	x86 Function Attributes
	`target("xsavec")` function attribute, x86	x86 Function Attributes
	`target("xsaveopt")` function attribute, x86	x86 Function Attributes
	`target("xsaves")` function attribute, x86	x86 Function Attributes
	`targs GCC_COLORS capability`	Diagnostic Message Formatting Options
	TC1	Standards
	TC2	Standards
	TC3	Standards
	`tda` variable attribute, V850	V850 Variable Attributes
	Technical Corrigenda	Standards
	Technical Corrigendum 1	Standards
	Technical Corrigendum 2	Standards
	Technical Corrigendum 3	Standards
	template instantiation	Template Instantiation
	temporaries, lifetime of	Temporaries
	tentative definitions	Code Gen Options
	`TERM_URLS environment variable`	Diagnostic Message Formatting Options
	`tgamma`	Library Builtins
	`tgammaf`	Library Builtins
	`tgammal`	Library Builtins
	`thiscall` function attribute, x86-32	x86 Function Attributes
	Thread-Local Storage	Thread-Local
	thunks	Nested Functions
	tiny data section on the H8/300H and H8S	H8/300 Variable Attributes
	`tiny_data` variable attribute, H8/300	H8/300 Variable Attributes
	TLS	Thread-Local
	`tls_model` variable attribute	Common Variable Attributes
	`tls-dialect=` function attribute, AArch64	AArch64 Function Attributes
	`TMPDIR`	Environment Variables
	`toascii`	Library Builtins
	`tolower`	Library Builtins
	`toupper`	Library Builtins
	`towlower`	Library Builtins
	`towupper`	Library Builtins
	traditional C language	Preprocessor Options
	transactional memory extensions for x86	__atomic Builtins
	`transparent_union` type attribute	Common Type Attributes
	`trap_exit` function attribute, SH	SH Function Attributes
	`trapa_handler` function attribute, SH	SH Function Attributes
	`trunc`	Library Builtins
	`truncf`	Library Builtins
	`truncl`	Library Builtins
	`tune=` function attribute, AArch64	AArch64 Function Attributes
	`tune=` function attribute, LoongArch	LoongArch Function Attributes
	`tune=` function attribute, RISC-V	RISC-V Function Attributes
	two-stage name lookup	Name lookup
	type alignment	Alignment
	type attributes	Type Attributes
	`type_info`	Vague Linkage
	`type-diff GCC_COLORS capability`	Diagnostic Message Formatting Options
	typedef names as function parameters	Incompatibilities
	`typeof`	Typeof

U
	`uhk` fixed-suffix	Fixed-Point
	`UHK` fixed-suffix	Fixed-Point
	`uhr` fixed-suffix	Fixed-Point
	`UHR` fixed-suffix	Fixed-Point
	`uk` fixed-suffix	Fixed-Point
	`UK` fixed-suffix	Fixed-Point
	`ulk` fixed-suffix	Fixed-Point
	`ULK` fixed-suffix	Fixed-Point
	`ULL` integer suffix	Long Long
	`ullk` fixed-suffix	Fixed-Point
	`ULLK` fixed-suffix	Fixed-Point
	`ullr` fixed-suffix	Fixed-Point
	`ULLR` fixed-suffix	Fixed-Point
	`ulr` fixed-suffix	Fixed-Point
	`ULR` fixed-suffix	Fixed-Point
	`unavailable` enumerator attribute	Enumerator Attributes
	`unavailable` function attribute	Common Function Attributes
	`unavailable` type attribute	Common Type Attributes
	`unavailable` variable attribute	Common Variable Attributes
	`uncached` type attribute, ARC	ARC Type Attributes
	undefined behavior	Bug Criteria
	undefined function value	Bug Criteria
	underlying type of an `enum`	Enum Extensions
	underscores in variables in macros	Typeof
	`uninitialized` variable attribute	Common Variable Attributes
	`union`	Unnamed Fields
	union, casting to a	Cast to Union
	unions	Incompatibilities
	unions with FAMs	Flexible Array Members in Unions
	unions with flexible array members	Flexible Array Members in Unions
	unknown pragmas, warning	Warning Options
	unresolved references and `-nodefaultlibs`	Link Options
	unresolved references and `-nostdlib`	Link Options
	`unsequenced` function type attribute	Common Function Attributes
	`unused` function attribute	Common Function Attributes
	`unused` label attribute	Label Attributes
	`unused` type attribute	Common Type Attributes
	`unused` variable attribute	Common Variable Attributes
	`upper` function attribute, MSP430	MSP430 Function Attributes
	`upper` variable attribute, MSP430	MSP430 Variable Attributes
	`ur` fixed-suffix	Fixed-Point
	`UR` fixed-suffix	Fixed-Point
	urls	Diagnostic Message Formatting Options
	`use_debug_exception_return` function attribute, MIPS	MIPS Function Attributes
	`use_hazard_barrier_return` function attribute, MIPS	MIPS Function Attributes
	`use_shadow_register_set` function attribute, MIPS	MIPS Function Attributes
	`used` function attribute	Common Function Attributes
	`used` variable attribute	Common Variable Attributes
	User stack pointer in interrupts on the Blackfin	Blackfin Function Attributes

V
	‘`V`’ in constraint	Simple Constraints
	V850 Options	V850 Options
	vague linkage	Vague Linkage
	`valid GCC_COLORS capability`	Diagnostic Message Formatting Options
	value after `longjmp`	Global Register Variables
	variable addressability on the M32R/D	M32R/D Variable Attributes
	variable alignment	Alignment
	variable attributes	Variable Attributes
	variable number of arguments	Variadic Macros
	variable-length array in a structure	Variable Length
	variable-length array scope	Variable Length
	variable-length arrays	Variable Length
	variables in specified registers	Explicit Register Variables
	variables, local, in macros	Typeof
	variadic functions, pointer arguments	Variadic Pointer Args
	variadic macros	Variadic Macros
	VAX options	VAX Options
	`vec_blendv`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_cfuge`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_clrl`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_clrr`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_cntlzm`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_cnttzm`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_extracth`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_extractl`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_genpcvm`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_gnb`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_inserth`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_insertl`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_pdep`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_permx`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_pext`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_replace_element`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_replace_unaligned`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_sldb`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_splati`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_splati_ins`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_splatid`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_srdb`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_stril`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_stril_p`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_strir`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_strir_p`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_ternarylogic`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_test_lsbb_all_ones`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_test_lsbb_all_zeros`	PowerPC AltiVec Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vec_xst_trunc`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vector` function attribute, RX	RX Function Attributes
	vector types, using with x86 intrinsics	Vector Extensions
	`vector_size` type attribute	Common Type Attributes
	`vector_size` variable attribute	Common Variable Attributes
	`version_id` function attribute, IA-64	IA-64 Function Attributes
	`vfprintf`	Library Builtins
	`vfscanf`	Library Builtins
	`visibility` function attribute	Common Function Attributes
	`visibility` type attribute	Common Type Attributes
	`visibility` variable attribute	Common Variable Attributes
	Visium options	Visium Options
	VLAs	Variable Length
	void pointers, arithmetic	Pointer Arith
	void, size of pointer to	Pointer Arith
	volatile access	Volatiles
	volatile access	C++ Volatiles
	`volatile` applied to function	Const and Volatile Functions
	volatile `asm`	Extended Asm
	volatile read	Volatiles
	volatile read	C++ Volatiles
	volatile write	Volatiles
	volatile write	C++ Volatiles
	`vprintf`	Library Builtins
	`vscanf`	Library Builtins
	`vsnprintf`	Library Builtins
	`vsprintf`	Library Builtins
	`vsscanf`	Library Builtins
	`vsx_xl_sext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vsx_xl_sext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vsx_xl_sext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vsx_xl_sext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vsx_xl_zext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vsx_xl_zext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vsx_xl_zext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	`vsx_xl_zext`	Basic PowerPC Built-in Functions Available on ISA 3.1
	vtable	Vague Linkage
	VxWorks Options	VxWorks Options

W
	`w` floating point suffix	Floating Types
	`W` floating point suffix	Floating Types
	`wakeup` function attribute, MSP430	MSP430 Function Attributes
	`warm` function attribute, NDS32	NDS32 Function Attributes
	`warn_if_not_aligned` type attribute	Common Type Attributes
	`warn_if_not_aligned` variable attribute	Common Variable Attributes
	`warn_unused` type attribute	C++ Attributes
	`warn_unused_result` function attribute	Common Function Attributes
	warning for comparison of signed and unsigned values	Warning Options
	warning for overloaded virtual function	C++ Dialect Options
	warning for reordering of member initializers	C++ Dialect Options
	warning for unknown pragmas	Warning Options
	`warning` function attribute	Common Function Attributes
	`warning GCC_COLORS capability`	Diagnostic Message Formatting Options
	warning messages	Warning Options
	warnings from system headers	Warning Options
	warnings vs errors	Warnings and Errors
	`weak` function attribute	Common Function Attributes
	`weak` variable attribute	Common Variable Attributes
	`weakref` function attribute	Common Function Attributes
	whitespace	Incompatibilities
	Windows Options for x86	x86 Windows Options

X
	‘`X`’ in constraint	Simple Constraints
	X3.159-1989	Standards
	x86 named address spaces	Named Address Spaces
	x86 Options	x86 Options
	x86 transactional memory extensions	__atomic Builtins
	x86 Windows Options	x86 Windows Options
	Xstormy16 Options	Xstormy16 Options
	Xtensa Options	Xtensa Options

Y
	`y0`	Library Builtins
	`y0f`	Library Builtins
	`y0l`	Library Builtins
	`y1`	Library Builtins
	`y1f`	Library Builtins
	`y1l`	Library Builtins
	`yn`	Library Builtins
	`ynf`	Library Builtins
	`ynl`	Library Builtins

Z
	`zda` variable attribute, V850	V850 Variable Attributes
	`zero_call_used_regs` function attribute	Common Function Attributes
	zero-length arrays	Zero Length
	zero-size structures	Empty Structures
	zSeries options	zSeries Options

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