-#serial 1000
+#serial 1002
# 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.
undefine([AC_FUNC_STRERROR_R])
# AC_FUNC_STRERROR_R
# ------------------
AC_DEFUN([AC_FUNC_STRERROR_R],
-[# Check strerror_r
-AC_CHECK_DECLS([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)
# if HAVE_STRING_H
# include <string.h>
# endif
-#ifndef HAVE_DECL_STRERROR_R
-"this configure-time declaration test was not run"
-#endif
-#if !HAVE_DECL_STRERROR_R
-char *strerror_r ();
-#endif
],
[
- char buf;
- char x = *strerror_r (0, &buf, sizeof buf);
+ 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 = yes; then
- AC_DEFINE_UNQUOTED(HAVE_WORKING_STRERROR_R, 1,
- [Define to 1 if `strerror_r' returns a string.])
+ if test $ac_cv_func_strerror_r_works = no; then
+ # strerror_r seems not to work, but now we have to 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];
+ 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)
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
fi
])# AC_FUNC_STRERROR_R