-#serial 1002
+#serial 1004
+# This file is not needed if you can assume Autoconf 2.54 or later.
# Experimental replacement for the function in the latest CVS autoconf.
-# If the compile-test says strerror_r doesn't work, then resort to a
-# `run'-test that works on BeOS and segfaults on DEC Unix.
# Use with the error.c file in ../lib.
+# Copyright (C) 2001 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
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])
-if test $ac_cv_func_strerror_r = yes; then
- AC_CHECK_HEADERS(string.h)
- AC_CACHE_CHECK([for working strerror_r],
- ac_cv_func_strerror_r_works,
+AC_CACHE_CHECK([whether strerror_r returns char *],
+ ac_cv_func_strerror_r_char_p,
[
- AC_TRY_COMPILE(
- [
-# include <stdio.h>
-# if HAVE_STRING_H
-# include <string.h>
-# endif
- ],
- [
- char buf[100];
- char x = *strerror_r (0, buf, sizeof buf);
- ],
- ac_cv_func_strerror_r_works=yes,
- ac_cv_func_strerror_r_works=no
- )
- if test $ac_cv_func_strerror_r_works = no; then
- # strerror_r seems not to work, but now we have to choose between
+ 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)
+ 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_TRY_RUN(
- [
-# include <stdio.h>
-# include <string.h>
-# include <ctype.h>
-
- extern char *strerror_r ();
-
- int
- main ()
- {
- char buf[100];
+ 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_works=yes,
- ac_cv_func_strerror_r_works=no,
- ac_cv_func_strerror_r_works=no)
+ exit (!isalpha (x));]])],
+ ac_cv_func_strerror_r_char_p=yes, , :)
fi
])
- if test $ac_cv_func_strerror_r_works = yes; then
- AC_DEFINE_UNQUOTED(HAVE_WORKING_STRERROR_R, 1,
- [Define to 1 if `strerror_r' returns a string.])
- 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