57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
# limits-h.m4
|
|
# serial 1
|
|
dnl Copyright 2016-2024 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
|
|
dnl Check whether limits.h has needed features.
|
|
|
|
dnl From Paul Eggert.
|
|
|
|
AC_DEFUN_ONCE([gl_LIMITS_H],
|
|
[
|
|
gl_CHECK_NEXT_HEADERS([limits.h])
|
|
|
|
AC_CACHE_CHECK([whether limits.h has WORD_BIT, BOOL_WIDTH etc.],
|
|
[gl_cv_header_limits_width],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
|
|
#define __STDC_WANT_IEC_60559_BFP_EXT__ 1
|
|
#endif
|
|
#include <limits.h>
|
|
long long llm = LLONG_MAX;
|
|
int wb = WORD_BIT;
|
|
int ullw = ULLONG_WIDTH;
|
|
int bw = BOOL_WIDTH;
|
|
int bm = BOOL_MAX;
|
|
int mblm = MB_LEN_MAX;
|
|
]])],
|
|
[gl_cv_header_limits_width=yes],
|
|
[gl_cv_header_limits_width=no])])
|
|
GL_GENERATE_LIMITS_H=true
|
|
AS_IF([test "$gl_cv_header_limits_width" = yes],
|
|
[AC_CACHE_CHECK([whether limits.h has SSIZE_MAX],
|
|
[gl_cv_header_limits_ssize_max],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_SOURCE(
|
|
[[#include <limits.h>
|
|
#ifndef SSIZE_MAX
|
|
#error "SSIZE_MAX is not defined"
|
|
#endif
|
|
]])],
|
|
[gl_cv_header_limits_ssize_max=yes],
|
|
[gl_cv_header_limits_ssize_max=no])])
|
|
if test "$gl_cv_header_limits_ssize_max" = yes; then
|
|
GL_GENERATE_LIMITS_H=false
|
|
fi])
|
|
])
|
|
|
|
dnl Unconditionally enables the replacement of <limits.h>.
|
|
AC_DEFUN([gl_REPLACE_LIMITS_H],
|
|
[
|
|
AC_REQUIRE([gl_LIMITS_H])
|
|
GL_GENERATE_LIMITS_H=true
|
|
])
|