-#serial 1
+#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.
-dnl From Jim Meyering.
-dnl Determine whether the strerror_r implementation is one of
-dnl the broken ones that returns `int' rather than `char*'.
-dnl Actually, this tests only whether it returns a scalar
-dnl or an array, but that should be enough.
-dnl This is used by lib/error.c.
+undefine([AC_FUNC_STRERROR_R])
-AC_DEFUN(jm_FUNC_STRERROR_R,
-[
- # Check 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],
- jm_cv_func_working_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_TRY_COMPILE(
[
- 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
+ # 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(
[
- int buf; /* avoiding square brackets makes this easier */
- char x = *strerror_r (0, buf, sizeof buf);
+# 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));
+ }
],
- jm_cv_func_working_strerror_r=yes,
- jm_cv_func_working_strerror_r=no
- )
- if test $jm_cv_func_working_strerror_r = yes; then
- AC_DEFINE_UNQUOTED(HAVE_WORKING_STRERROR_R, 1,
- [Define to 1 if strerror_r returns a string.])
- fi
- ])
+ 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