1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
# strverscmp.m4
# serial 10
dnl Copyright (C) 2002, 2005-2025 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 This file is offered as-is, without any warranty.
AC_DEFUN([gl_FUNC_STRVERSCMP],
[
dnl Persuade glibc <string.h> to declare strverscmp().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_STRING_H_DEFAULTS])
AC_CHECK_FUNCS([strverscmp])
if test $ac_cv_func_strverscmp = no; then
HAVE_STRVERSCMP=0
else
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether strverscmp works],
[gl_cv_func_strverscmp_works],
[dnl Detect musl-1.2.3 and Cygwin 3.4.6 bug.
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <string.h>
int main ()
{
return strverscmp ("UNKNOWN", "2.2.0") <= 0;
}
]])],
[gl_cv_func_strverscmp_works=yes],
[gl_cv_func_strverscmp_works=no],
[case "$host_os" in
# Guess yes on glibc systems.
*-gnu* | gnu*) gl_cv_func_strverscmp_works="guessing yes" ;;
# Guess no on musl systems.
*-musl* | midipix*) gl_cv_func_strverscmp_works="guessing no" ;;
# Guess no on Cygwin.
cygwin*) gl_cv_func_strverscmp_works="guessing no" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_strverscmp_works="$gl_cross_guess_normal" ;;
esac
])
])
case "$gl_cv_func_strverscmp_works" in
*yes) ;;
*) REPLACE_STRVERSCMP=1 ;;
esac
fi
])
# Prerequisites of lib/strverscmp.c.
AC_DEFUN([gl_PREREQ_STRVERSCMP], [
:
])
|
