X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffcntl.m4;h=a93ed85a368839978f33bc67f7fad66eb1418e03;hb=56005a21e8f9f434212a19dcb628c6d3b179fd08;hp=3a86f2ca49b286826fee977da79da1fc86100eff;hpb=d60f3b0c6b0f93a601acd1cfd3923f94ca05abb0;p=gnulib.git

diff --git a/m4/fcntl.m4 b/m4/fcntl.m4
index 3a86f2ca4..a93ed85a3 100644
--- a/m4/fcntl.m4
+++ b/m4/fcntl.m4
@@ -1,4 +1,4 @@
-# fcntl.m4 serial 3
+# fcntl.m4 serial 4
 dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -24,11 +24,16 @@ AC_DEFUN([gl_FUNC_FCNTL],
     gl_REPLACE_FCNTL
   else
     dnl cygwin 1.5.x F_DUPFD has wrong errno, and allows negative target
+    dnl haiku alpha 2 F_DUPFD has wrong errno
     AC_CACHE_CHECK([whether fcntl handles F_DUPFD correctly],
       [gl_cv_func_fcntl_f_dupfd_works],
       [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
 #include <fcntl.h>
-]], [[return fcntl (0, F_DUPFD, -1) != -1;
+#include <errno.h>
+]], [[int result = 0;
+      if (fcntl (0, F_DUPFD, -1) != -1) result |= 1;
+      if (errno != EINVAL) result |= 2;
+      return result;
          ]])],
          [gl_cv_func_fcntl_f_dupfd_works=yes],
          [gl_cv_func_fcntl_f_dupfd_works=no],