X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsysexits.m4;h=bbd6973c20265640ad5a55fce075f02995244aae;hb=0edd3615919bbf744bdb56a59cf736f36a020b9b;hp=31386cec0edf34254771be6a5ad27bee3e06c1f9;hpb=2d7b775ad8b45869a3866e55d4d2ced6bc4a5d01;p=gnulib.git

diff --git a/m4/sysexits.m4 b/m4/sysexits.m4
index 31386cec0..bbd6973c2 100644
--- a/m4/sysexits.m4
+++ b/m4/sysexits.m4
@@ -1,15 +1,43 @@
-# sysexits.m4 serial 1
-dnl Copyright (C) 2003 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License.  As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# sysexits.m4 serial 4
+dnl Copyright (C) 2003, 2005, 2007 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_SYSEXITS],
 [
-  AC_CHECK_HEADERS(sysexits.h,
-    [SYSEXITS_H=sysexits.h],
-    [SYSEXITS_H=])
+  AC_CHECK_HEADERS_ONCE([sysexits.h])
+  if test $ac_cv_header_sysexits_h = yes; then
+    HAVE_SYSEXITS_H=1
+    gl_CHECK_NEXT_HEADERS([sysexits.h])
+    AC_TRY_COMPILE([#include <sysexits.h>],
+      [switch (0)
+       {
+       case EX_OK:
+       case EX_USAGE:
+       case EX_DATAERR:
+       case EX_NOINPUT:
+       case EX_NOUSER:
+       case EX_NOHOST:
+       case EX_UNAVAILABLE:
+       case EX_SOFTWARE:
+       case EX_OSERR:
+       case EX_OSFILE:
+       case EX_CANTCREAT:
+       case EX_IOERR:
+       case EX_TEMPFAIL:
+       case EX_PROTOCOL:
+       case EX_NOPERM:
+       case EX_CONFIG:
+         break;
+       }
+      ],
+      [SYSEXITS_H=],
+      [SYSEXITS_H=sysexits.h])
+  else
+    HAVE_SYSEXITS_H=0
+    SYSEXITS_H=sysexits.h
+  fi
+  AC_SUBST([HAVE_SYSEXITS_H])
   AC_SUBST([SYSEXITS_H])
 ])