-#serial 1003
-# Experimental replacement for the function in the latest CVS autoconf.
-# Use with the error.c file in ../lib.
+# strerror_r.m4 serial 3
+dnl Copyright (C) 2002, 2007-2011 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.
-# Copyright 2001 Free Software Foundation, Inc.
+AC_DEFUN([gl_FUNC_STRERROR_R],
+[
+ AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+ AC_REQUIRE([gl_HEADER_ERRNO_H])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
+ dnl Persuade Solaris <string.h> to declare strerror_r().
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
+ dnl Some systems don't declare strerror_r() if _THREAD_SAFE and _REENTRANT
+ dnl are not defined.
+ AC_CHECK_DECLS_ONCE([strerror_r])
+ if test $ac_cv_have_decl_strerror_r = no; then
+ HAVE_DECL_STRERROR_R=0
+ fi
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software Foundation,
-# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-undefine([AC_FUNC_STRERROR_R])
-
-# AC_FUNC_STRERROR_R
-# ------------------
-AC_DEFUN([AC_FUNC_STRERROR_R],
-[AC_CHECK_DECLS([strerror_r])
-AC_CHECK_FUNCS([strerror_r])
-AC_CACHE_CHECK([whether strerror_r returns char *],
- ac_cv_func_strerror_r_char_p,
- [
- ac_cv_func_strerror_r_char_p=no
- if test $ac_cv_have_decl_strerror_r = yes; then
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
- [[
- char buf[100];
- char x = *strerror_r (0, buf, sizeof buf);
- char *p = strerror_r (0, buf, sizeof buf);
- ]])],
- ac_cv_func_strerror_r_char_p=yes)
+ AC_CHECK_FUNCS([strerror_r])
+ if test $ac_cv_func_strerror_r = yes; then
+ if test -z "$ERRNO_H"; then
+ dnl The POSIX prototype is: int strerror_r (int, char *, size_t);
+ dnl glibc, Cygwin: char *strerror_r (int, char *, size_t);
+ dnl AIX 5.1, OSF/1 5.1: int strerror_r (int, char *, int);
+ AC_CACHE_CHECK([for strerror_r with POSIX signature],
+ [gl_cv_func_strerror_r_posix_signature],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <string.h>
+ int strerror_r (int, char *, size_t);
+ ]],
+ [[return strerror (0);]])],
+ [gl_cv_func_strerror_r_posix_signature=yes],
+ [gl_cv_func_strerror_r_posix_signature=no])
+ ])
+ if test $gl_cv_func_strerror_r_posix_signature = yes; then
+ dnl AIX 6.1 strerror_r fails by returning -1, not an error number.
+ dnl HP-UX 11.31 strerror_r always fails when the buffer length argument
+ dnl is less than 80.
+ AC_CACHE_CHECK([whether strerror_r works],
+ [gl_cv_func_strerror_r_works],
+ [AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <errno.h>
+ #include <string.h>
+ int strerror_r (int, char *, size_t);
+ ]],
+ [[int result = 0;
+ char buf[79];
+ if (strerror_r (EACCES, buf, 0) < 0)
+ result |= 1;
+ if (strerror_r (EACCES, buf, sizeof (buf)) != 0)
+ result |= 2;
+ return result;
+ ]])],
+ [gl_cv_func_strerror_r_works=yes],
+ [gl_cv_func_strerror_r_works=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess no on AIX.
+ aix*) gl_cv_func_strerror_r_works="guessing no";;
+ # Guess no on HP-UX.
+ hpux*) gl_cv_func_strerror_r_works="guessing no";;
+ # Guess yes otherwise.
+ *) gl_cv_func_strerror_r_works="guessing yes";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+ case "$gl_cv_func_strerror_r_works" in
+ *no) REPLACE_STRERROR_R=1 ;;
+ esac
+ else
+ dnl The system's strerror() has a wrong signature. Replace it.
+ REPLACE_STRERROR_R=1
+ dnl glibc >= 2.3.4 has a function __xpg_strerror_r.
+ AC_CHECK_FUNCS([__xpg_strerror_r])
+ fi
else
- # strerror_r is not declared. Choose between
- # systems that have relatively inaccessible declarations for the
- # function. BeOS and DEC UNIX 4.0 fall in this category, but the
- # former has a strerror_r that returns char*, while the latter
- # has a strerror_r that returns `int'.
- # This test should segfault on the DEC system.
- AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
- extern char *strerror_r ();],
- [[char buf[100];
- char x = *strerror_r (0, buf, sizeof buf);
- exit (!isalpha (x));]])],
- ac_cv_func_strerror_r_char_p=yes, , :)
+ dnl The system's strerror_r() cannot know about the new errno values we
+ dnl add to <errno.h>. Replace it.
+ REPLACE_STRERROR_R=1
+ AC_DEFINE([EXTEND_STRERROR_R], [1],
+ [Define to 1 if strerror_r needs to be extended so that it handles the
+ extra errno values.])
fi
- ])
-if test $ac_cv_func_strerror_r_char_p = yes; then
- AC_DEFINE([STRERROR_R_CHAR_P], 1,
- [Define to 1 if strerror_r returns char *.])
-fi
-])# AC_FUNC_STRERROR_R
+ fi
+ if test $HAVE_DECL_STRERROR_R = 0 || test $REPLACE_STRERROR_R = 1; then
+ AC_LIBOBJ([strerror_r])
+ gl_PREREQ_STRERROR_R
+ fi
+])
+
+# Prerequisites of lib/strerror_r.c.
+AC_DEFUN([gl_PREREQ_STRERROR_R], [
+ :
+])
projects / gnulib.git / blobdiff