X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstrerror.m4;h=03a0b1a39646be1f1efeeeb8c249d3782c04d468;hb=5bf7fda437a10cc10cbd1be1bd06b374a581f0dd;hp=1ae1a2d12d9766762cc0f7cee9f13d2bf9d5d52a;hpb=3bc888d2335fd1b42102b034d17e73ab96b6b4eb;p=gnulib.git

diff --git a/m4/strerror.m4 b/m4/strerror.m4
index 1ae1a2d12..03a0b1a39 100644
--- a/m4/strerror.m4
+++ b/m4/strerror.m4
@@ -1,4 +1,4 @@
-# strerror.m4 serial 13
+# strerror.m4 serial 15
 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,
@@ -20,10 +20,14 @@ AC_DEFUN([gl_FUNC_STRERROR],
              #include <errno.h>
            ]],
            [[int result = 0;
+             char *str;
              if (!*strerror (-2)) result |= 1;
              errno = 0;
-             if (!*strerror (0)) result |= 2;
+             str = strerror (0);
+             if (!*str) result |= 2;
              if (errno) result |= 4;
+             if (strstr (str, "nknown") || strstr (str, "ndefined"))
+               result |= 8;
              return result;]])],
         [gl_cv_func_working_strerror=yes],
         [gl_cv_func_working_strerror=no],
@@ -48,16 +52,3 @@ AC_DEFUN([gl_FUNC_STRERROR],
     REPLACE_STRERROR=1
   fi
 ])
-
-# Prerequisites of lib/strerror.c.
-AC_DEFUN([gl_PREREQ_STRERROR], [
-  AC_CHECK_DECLS([strerror])
-  AC_CHECK_HEADERS_ONCE([sys/socket.h])
-  if test $ac_cv_header_sys_socket_h != yes; then
-    dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
-    dnl the check for those headers unconditional; yet cygwin reports
-    dnl that the headers are present but cannot be compiled (since on
-    dnl cygwin, all socket information should come from sys/socket.h).
-    AC_CHECK_HEADERS([winsock2.h])
-  fi
-])