modernc.org/cc@v1.0.1/v2/headers/linux_386/usr/include/i386-linux-gnu/bits/environments.h (about)

     1  /* Copyright (C) 1999-2018 Free Software Foundation, Inc.
     2     This file is part of the GNU C Library.
     3  
     4     The GNU C Library is free software; you can redistribute it and/or
     5     modify it under the terms of the GNU Lesser General Public
     6     License as published by the Free Software Foundation; either
     7     version 2.1 of the License, or (at your option) any later version.
     8  
     9     The GNU C Library is distributed in the hope that it will be useful,
    10     but WITHOUT ANY WARRANTY; without even the implied warranty of
    11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12     Lesser General Public License for more details.
    13  
    14     You should have received a copy of the GNU Lesser General Public
    15     License along with the GNU C Library; if not, see
    16     <http://www.gnu.org/licenses/>.  */
    17  
    18  #ifndef _UNISTD_H
    19  # error "Never include this file directly.  Use <unistd.h> instead"
    20  #endif
    21  
    22  #include <bits/wordsize.h>
    23  
    24  /* This header should define the following symbols under the described
    25     situations.  A value `1' means that the model is always supported,
    26     `-1' means it is never supported.  Undefined means it cannot be
    27     statically decided.
    28  
    29     _POSIX_V7_ILP32_OFF32   32bit int, long, pointers, and off_t type
    30     _POSIX_V7_ILP32_OFFBIG  32bit int, long, and pointers and larger off_t type
    31  
    32     _POSIX_V7_LP64_OFF32	   64bit long and pointers and 32bit off_t type
    33     _POSIX_V7_LPBIG_OFFBIG  64bit long and pointers and large off_t type
    34  
    35     The macros _POSIX_V6_ILP32_OFF32, _POSIX_V6_ILP32_OFFBIG,
    36     _POSIX_V6_LP64_OFF32, _POSIX_V6_LPBIG_OFFBIG, _XBS5_ILP32_OFF32,
    37     _XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and _XBS5_LPBIG_OFFBIG were
    38     used in previous versions of the Unix standard and are available
    39     only for compatibility.
    40  */
    41  
    42  #if __WORDSIZE == 64
    43  
    44  /* Environments with 32-bit wide pointers are optionally provided.
    45     Therefore following macros aren't defined:
    46     # undef _POSIX_V7_ILP32_OFF32
    47     # undef _POSIX_V7_ILP32_OFFBIG
    48     # undef _POSIX_V6_ILP32_OFF32
    49     # undef _POSIX_V6_ILP32_OFFBIG
    50     # undef _XBS5_ILP32_OFF32
    51     # undef _XBS5_ILP32_OFFBIG
    52     and users need to check at runtime.  */
    53  
    54  /* We also have no use (for now) for an environment with bigger pointers
    55     and offsets.  */
    56  # define _POSIX_V7_LPBIG_OFFBIG	-1
    57  # define _POSIX_V6_LPBIG_OFFBIG	-1
    58  # define _XBS5_LPBIG_OFFBIG	-1
    59  
    60  /* By default we have 64-bit wide `long int', pointers and `off_t'.  */
    61  # define _POSIX_V7_LP64_OFF64	1
    62  # define _POSIX_V6_LP64_OFF64	1
    63  # define _XBS5_LP64_OFF64	1
    64  
    65  #else				/* __WORDSIZE == 32 */
    66  
    67  /* We have 32-bit wide `int', `long int' and pointers and all platforms
    68     support LFS.  -mx32 has 64-bit wide `off_t'.  */
    69  # define _POSIX_V7_ILP32_OFFBIG	1
    70  # define _POSIX_V6_ILP32_OFFBIG 1
    71  # define _XBS5_ILP32_OFFBIG	1
    72  
    73  # ifndef __x86_64__
    74  /* -m32 has 32-bit wide `off_t'.  */
    75  #  define _POSIX_V7_ILP32_OFF32	1
    76  #  define _POSIX_V6_ILP32_OFF32	1
    77  #  define _XBS5_ILP32_OFF32	1
    78  # endif
    79  
    80  /* We optionally provide an environment with the above size but an 64-bit
    81     side `off_t'.  Therefore we don't define _POSIX_V7_ILP32_OFFBIG.  */
    82  
    83  /* Environments with 64-bit wide pointers can be provided,
    84     so these macros aren't defined:
    85     # undef _POSIX_V7_LP64_OFF64
    86     # undef _POSIX_V7_LPBIG_OFFBIG
    87     # undef _POSIX_V6_LP64_OFF64
    88     # undef _POSIX_V6_LPBIG_OFFBIG
    89     # undef _XBS5_LP64_OFF64
    90     # undef _XBS5_LPBIG_OFFBIG
    91     and sysconf tests for it at runtime.  */
    92  
    93  #endif				/* __WORDSIZE == 32 */
    94  
    95  #define __ILP32_OFF32_CFLAGS	"-m32"
    96  #define __ILP32_OFF32_LDFLAGS	"-m32"
    97  #if defined __x86_64__ && defined __ILP32__
    98  # define __ILP32_OFFBIG_CFLAGS	"-mx32"
    99  # define __ILP32_OFFBIG_LDFLAGS	"-mx32"
   100  #else
   101  # define __ILP32_OFFBIG_CFLAGS	"-m32 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
   102  # define __ILP32_OFFBIG_LDFLAGS	"-m32"
   103  #endif
   104  #define __LP64_OFF64_CFLAGS	"-m64"
   105  #define __LP64_OFF64_LDFLAGS	"-m64"