X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsysexits.m4;h=bbd6973c20265640ad5a55fce075f02995244aae;hb=9668e66bbd5997046efb9eda9ad71aedec788599;hp=69d20917be6aaf224168365420b008e7e890e97b;hpb=344b475fa38c60c90b9150c214d425d1ef3e3e7b;p=gnulib.git

diff --git a/m4/sysexits.m4 b/m4/sysexits.m4
index 69d20917b..bbd6973c2 100644
--- a/m4/sysexits.m4
+++ b/m4/sysexits.m4
@@ -1,13 +1,43 @@
-# sysexits.m4 serial 2
-dnl Copyright (C) 2003,2005 Free Software Foundation, Inc.
+# 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])
 ])