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# wcscmp.m4 serial 3
dnl Copyright (C) 2011-2023 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.
AC_DEFUN([gl_FUNC_WCSCMP],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([wcscmp])
if test $ac_cv_func_wcscmp = no; then
HAVE_WCSCMP=0
else
AC_CACHE_CHECK([whether wcscmp works for all wide characters],
[gl_cv_func_wcscmp_works],
[AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <wchar.h>
int main ()
{
int result = 0;
{ /* This test fails on glibc < 2.15, musl libc 1.2.3, macOS 12.5,
FreeBSD 13.2, NetBSD 9.0, OpenBSD 7.2, Solaris 11.4. */
wchar_t a[2] = { (wchar_t) 0x76547654, 0 };
wchar_t b[2] = { (wchar_t) 0x9abc9abc, 0 };
int cmp = wcscmp (a, b);
if (!((wchar_t)-1 < 0 ? cmp > 0 : cmp < 0))
result |= 1;
}
{ /* This test fails on AIX in 64-bit mode. */
wchar_t c[2] = { (wchar_t) 'x', 0 };
wchar_t d[3] = { (wchar_t) 'x', (wchar_t) 0x9abc9abc, 0 };
int cmp = wcscmp (c, d);
if (!((wchar_t)-1 < 0 ? cmp > 0 : cmp < 0))
result |= 2;
}
return result;
}
]])
],
[gl_cv_func_wcscmp_works=yes],
[gl_cv_func_wcscmp_works=no],
[case "$host_on" in
# Guess no on glibc versions < 2.15.
*-gnu* | gnu*)
AC_EGREP_CPP([Unlucky],
[
#include <features.h>
#ifdef __GNU_LIBRARY__
#if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 15)
Unlucky GNU user
#endif
#endif
],
[gl_cv_func_wcscmp_works="guessing no"],
[gl_cv_func_wcscmp_works="guessing yes"])
;;
# Guess no on musl systems.
*-musl* | midipix*) gl_cv_func_wcscmp_works="guessing no" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_wcscmp_works="$gl_cross_guess_normal" ;;
esac
])
])
case "$gl_cv_func_wcscmp_works" in
*yes) ;;
*) REPLACE_WCSCMP=1 ;;
esac
fi
])
|
