3 dnl Copyright (C) 2020-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 AC_DEFUN([gl_FUNC_STRERRORNAME_NP],
10 AC_REQUIRE([gl_STRING_H_DEFAULTS])
12 AC_REQUIRE([gl_CHECK_STRERRORNAME_NP])
13 if test $ac_cv_func_strerrorname_np = yes; then
14 case "$gl_cv_func_strerrorname_np_works" in
16 *) REPLACE_STRERRORNAME_NP=1 ;;
19 HAVE_STRERRORNAME_NP=0
23 # Check for a working strerrorname_np function.
24 # Sets ac_cv_func_strerrorname_np, gl_cv_func_strerrorname_np_works.
25 AC_DEFUN([gl_CHECK_STRERRORNAME_NP],
27 dnl Persuade glibc <string.h> to declare strerrorname_np().
28 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
30 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
32 AC_CHECK_FUNCS([strerrorname_np])
33 if test $ac_cv_func_strerrorname_np = yes; then
34 dnl In glibc 2.32, strerrorname_np returns English error descriptions, not
36 dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=26555>.
37 dnl In glibc 2.36, strerrorname_np returns NULL for EDEADLOCK on powerpc and
39 dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=29545>.
40 dnl In glibc 2.37, strerrorname_np returns NULL for ENOSYM and
41 dnl EREMOTERELEASE on hppa platforms.
42 dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=31080>.
43 AC_CACHE_CHECK([whether strerrorname_np works],
44 [gl_cv_func_strerrorname_np_works],
51 strcmp (strerrorname_np (EINVAL), "EINVAL") != 0
53 || strerrorname_np (EDEADLOCK) == NULL
56 || strerrorname_np (ENOSYM) == NULL
60 [gl_cv_func_strerrorname_np_works=yes],
61 [gl_cv_func_strerrorname_np_works=no],
63 # Guess no on glibc systems.
65 gl_cv_func_strerrorname_np_works="guessing no" ;;
66 # Otherwise obey --enable-cross-guesses.
68 gl_cv_func_strerrorname_np_works="$gl_cross_guess_normal" ;;
75 # Prerequisite for using strerrorname_np when available.
76 AC_DEFUN_ONCE([gl_OPTIONAL_STRERRORNAME_NP],
78 AC_REQUIRE([gl_CHECK_STRERRORNAME_NP])
79 if test $ac_cv_func_strerrorname_np = yes; then
80 case "$gl_cv_func_strerrorname_np_works" in
82 AC_DEFINE([HAVE_WORKING_STRERRORNAME_NP], [1],
83 [Define to 1 if the function strerrorname_np exists and works.])