mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-01 08:17:38 +00:00
50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
# c-strtod.m4 serial 15
|
|
|
|
# Copyright (C) 2004-2006, 2009-2015 Free Software Foundation, Inc.
|
|
# This file is free software; the Free Software Foundation
|
|
# gives unlimited permission to copy and/or distribute it,
|
|
# with or without modifications, as long as this notice is preserved.
|
|
|
|
# Written by Paul Eggert.
|
|
|
|
AC_DEFUN([gl_C99_STRTOLD],
|
|
[
|
|
AC_CACHE_CHECK([whether strtold conforms to C99],
|
|
[gl_cv_func_c99_strtold],
|
|
[AC_LINK_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[/* On HP-UX before 11.23, strtold returns a struct instead of
|
|
long double. Reject implementations like that, by requiring
|
|
compatibility with the C99 prototype. */
|
|
#include <stdlib.h>
|
|
static long double (*p) (char const *, char **) = strtold;
|
|
static long double
|
|
test (char const *nptr, char **endptr)
|
|
{
|
|
long double r;
|
|
r = strtold (nptr, endptr);
|
|
return r;
|
|
}]],
|
|
[[return test ("1.0", NULL) != 1 || p ("1.0", NULL) != 1;]])],
|
|
[gl_cv_func_c99_strtold=yes],
|
|
[gl_cv_func_c99_strtold=no])])
|
|
if test $gl_cv_func_c99_strtold = yes; then
|
|
AC_DEFINE([HAVE_C99_STRTOLD], [1], [Define to 1 if strtold conforms to C99.])
|
|
fi
|
|
])
|
|
|
|
dnl Prerequisites of lib/c-strtod.c.
|
|
AC_DEFUN([gl_C_STRTOD],
|
|
[
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
AC_CHECK_FUNCS([strtod_l])
|
|
])
|
|
|
|
dnl Prerequisites of lib/c-strtold.c.
|
|
AC_DEFUN([gl_C_STRTOLD],
|
|
[
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
AC_REQUIRE([gl_C99_STRTOLD])
|
|
AC_CHECK_FUNCS([strtold_l])
|
|
])
|