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The C and C++ Include Header Files

/usr/include/python3.12/pymacconfig.h

$ cat -n /usr/include/python3.12/pymacconfig.h

     1	#ifndef PYMACCONFIG_H
     2	#define PYMACCONFIG_H
     3	     /*
     4	      * This file moves some of the autoconf magic to compile-time
     5	      * when building on MacOSX. This is needed for building 4-way
     6	      * universal binaries and for 64-bit universal binaries because
     7	      * the values redefined below aren't configure-time constant but
     8	      * only compile-time constant in these scenarios.
     9	      */
    10	
    11	#if defined(__APPLE__)
    12	
    13	# undef ALIGNOF_MAX_ALIGN_T
    14	# undef SIZEOF_LONG
    15	# undef SIZEOF_LONG_DOUBLE
    16	# undef SIZEOF_PTHREAD_T
    17	# undef SIZEOF_SIZE_T
    18	# undef SIZEOF_TIME_T
    19	# undef SIZEOF_VOID_P
    20	# undef SIZEOF__BOOL
    21	# undef SIZEOF_UINTPTR_T
    22	# undef SIZEOF_PTHREAD_T
    23	# undef WORDS_BIGENDIAN
    24	# undef DOUBLE_IS_ARM_MIXED_ENDIAN_IEEE754
    25	# undef DOUBLE_IS_BIG_ENDIAN_IEEE754
    26	# undef DOUBLE_IS_LITTLE_ENDIAN_IEEE754
    27	# undef HAVE_GCC_ASM_FOR_X87
    28	# undef HAVE_GCC_ASM_FOR_X64
    29	
    30	#    undef VA_LIST_IS_ARRAY
    31	#    if defined(__LP64__) && defined(__x86_64__)
    32	#        define VA_LIST_IS_ARRAY 1
    33	#    endif
    34	
    35	#    undef HAVE_LARGEFILE_SUPPORT
    36	#    ifndef __LP64__
    37	#         define HAVE_LARGEFILE_SUPPORT 1
    38	#    endif
    39	
    40	#    undef SIZEOF_LONG
    41	#    ifdef __LP64__
    42	#        define SIZEOF__BOOL            1
    43	#        define SIZEOF__BOOL            1
    44	#        define SIZEOF_LONG             8
    45	#        define SIZEOF_PTHREAD_T        8
    46	#        define SIZEOF_SIZE_T           8
    47	#        define SIZEOF_TIME_T           8
    48	#        define SIZEOF_VOID_P           8
    49	#        define SIZEOF_UINTPTR_T        8
    50	#        define SIZEOF_PTHREAD_T        8
    51	#    else
    52	#        ifdef __ppc__
    53	#           define SIZEOF__BOOL         4
    54	#        else
    55	#           define SIZEOF__BOOL         1
    56	#        endif
    57	#        define SIZEOF_LONG             4
    58	#        define SIZEOF_PTHREAD_T        4
    59	#        define SIZEOF_SIZE_T           4
    60	#        define SIZEOF_TIME_T           4
    61	#        define SIZEOF_VOID_P           4
    62	#        define SIZEOF_UINTPTR_T        4
    63	#        define SIZEOF_PTHREAD_T        4
    64	#    endif
    65	
    66	#    if defined(__LP64__)
    67	     /* MacOSX 10.4 (the first release to support 64-bit code
    68	      * at all) only supports 64-bit in the UNIX layer.
    69	      * Therefore suppress the toolbox-glue in 64-bit mode.
    70	      */
    71	
    72	    /* In 64-bit mode setpgrp always has no arguments, in 32-bit
    73	     * mode that depends on the compilation environment
    74	     */
    75	#       undef SETPGRP_HAVE_ARG
    76	
    77	#    endif
    78	
    79	#ifdef __BIG_ENDIAN__
    80	#define WORDS_BIGENDIAN 1
    81	#define DOUBLE_IS_BIG_ENDIAN_IEEE754
    82	#else
    83	#define DOUBLE_IS_LITTLE_ENDIAN_IEEE754
    84	#endif /* __BIG_ENDIAN */
    85	
    86	#if defined(__i386__) || defined(__x86_64__)
    87	# define HAVE_GCC_ASM_FOR_X87
    88	# define ALIGNOF_MAX_ALIGN_T 16
    89	# define HAVE_GCC_ASM_FOR_X64 1
    90	# define SIZEOF_LONG_DOUBLE 16
    91	#else
    92	# define ALIGNOF_MAX_ALIGN_T 8
    93	# define SIZEOF_LONG_DOUBLE 8
    94	#endif
    95	
    96	
    97	#endif /* defined(_APPLE__) */
    98	
    99	#endif /* PYMACCONFIG_H */
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