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# strerrorname_np.m4
# serial 6
dnl Copyright (C) 2020-2024 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.
AC_DEFUN([gl_FUNC_STRERRORNAME_NP],
[
AC_REQUIRE([gl_STRING_H_DEFAULTS])
AC_REQUIRE([gl_CHECK_STRERRORNAME_NP])
if test $ac_cv_func_strerrorname_np = yes; then
case "$gl_cv_func_strerrorname_np_works" in
*yes) ;;
*) REPLACE_STRERRORNAME_NP=1 ;;
esac
else
HAVE_STRERRORNAME_NP=0
fi
])
# Check for a working strerrorname_np function.
# Sets ac_cv_func_strerrorname_np, gl_cv_func_strerrorname_np_works.
AC_DEFUN([gl_CHECK_STRERRORNAME_NP],
[
dnl Persuade glibc <string.h> to declare strerrorname_np().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_FUNCS([strerrorname_np])
if test $ac_cv_func_strerrorname_np = yes; then
dnl In glibc 2.32, strerrorname_np returns English error descriptions, not
dnl error names.
dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=26555>.
dnl In glibc 2.36, strerrorname_np returns NULL for EDEADLOCK on powerpc and
dnl sparc platforms.
dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=29545>.
dnl In glibc 2.37, strerrorname_np returns NULL for ENOSYM and
dnl EREMOTERELEASE on hppa platforms.
dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=31080>.
AC_CACHE_CHECK([whether strerrorname_np works],
[gl_cv_func_strerrorname_np_works],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <errno.h>
#include <string.h>
]],
[[return
strcmp (strerrorname_np (EINVAL), "EINVAL") != 0
#ifdef EDEADLOCK
|| strerrorname_np (EDEADLOCK) == NULL
#endif
#ifdef ENOSYM
|| strerrorname_np (ENOSYM) == NULL
#endif
;
]])],
[gl_cv_func_strerrorname_np_works=yes],
[gl_cv_func_strerrorname_np_works=no],
[case "$host_os" in
# Guess no on glibc systems.
*-gnu* | gnu*)
gl_cv_func_strerrorname_np_works="guessing no" ;;
# Otherwise obey --enable-cross-guesses.
*)
gl_cv_func_strerrorname_np_works="$gl_cross_guess_normal" ;;
esac
])
])
fi
])
# Prerequisite for using strerrorname_np when available.
AC_DEFUN_ONCE([gl_OPTIONAL_STRERRORNAME_NP],
[
AC_REQUIRE([gl_CHECK_STRERRORNAME_NP])
if test $ac_cv_func_strerrorname_np = yes; then
case "$gl_cv_func_strerrorname_np_works" in
*yes)
AC_DEFINE([HAVE_WORKING_STRERRORNAME_NP], [1],
[Define to 1 if the function strerrorname_np exists and works.])
;;
esac
fi
])
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