mirror of https://gitee.com/openkylin/wget.git
44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
dnl Check whether limits.h has needed features.
|
|
|
|
dnl Copyright 2016-2019 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 From Paul Eggert.
|
|
|
|
AC_DEFUN_ONCE([gl_LIMITS_H],
|
|
[
|
|
gl_CHECK_NEXT_HEADERS([limits.h])
|
|
|
|
AC_CACHE_CHECK([whether limits.h has LLONG_MAX, WORD_BIT, ULLONG_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;
|
|
]])],
|
|
[gl_cv_header_limits_width=yes],
|
|
[gl_cv_header_limits_width=no])])
|
|
if test "$gl_cv_header_limits_width" = yes; then
|
|
LIMITS_H=
|
|
else
|
|
LIMITS_H=limits.h
|
|
fi
|
|
AC_SUBST([LIMITS_H])
|
|
AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
|
|
])
|
|
|
|
dnl Unconditionally enables the replacement of <limits.h>.
|
|
AC_DEFUN([gl_REPLACE_LIMITS_H],
|
|
[
|
|
AC_REQUIRE([gl_LIMITS_H])
|
|
LIMITS_H='limits.h'
|
|
AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
|
|
])
|