From b88091566ce205b7b43211047784cadb92e2e187 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Sat, 24 Jun 2000 12:05:08 +0000
Subject: [PATCH] Revive this file -- to try out an experimental version of
 AC_FUNC_STRERROR_R that may work even on BeOS, a system for which strerror
 does return char*, but which lacks a conveniently accessible declaration of
 the function.

---
 m4/strerror_r.m4 | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 m4/strerror_r.m4

diff --git a/m4/strerror_r.m4 b/m4/strerror_r.m4
new file mode 100644
index 000000000..8ae4c71b9
--- /dev/null
+++ b/m4/strerror_r.m4
@@ -0,0 +1,44 @@
+#serial 1000
+# Experimental replacement for the function in the latest CVS autoconf.
+# 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_FUNCS([strerror_r])
+if test $ac_cv_func_strerror_r = yes; then
+  AC_CHECK_HEADERS(string.h)
+  AC_CHECK_DECLS([strerror_r])
+  AC_CACHE_CHECK([for working strerror_r],
+                 ac_cv_func_strerror_r_works,
+   [
+    AC_TRY_COMPILE(
+     [
+#       include <stdio.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);
+     ],
+     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.])
+    fi
+  ])
+fi
+])# AC_FUNC_STRERROR_R
-- 
2.11.0