X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsysexits.m4;h=bd8abaa0d448672f698d5afcf5b45d1bd70ec1c8;hb=8209e72bf20d2b582384e91fde65df4f848a3a04;hp=31386cec0edf34254771be6a5ad27bee3e06c1f9;hpb=2d7b775ad8b45869a3866e55d4d2ced6bc4a5d01;p=gnulib.git

diff --git a/m4/sysexits.m4 b/m4/sysexits.m4
index 31386cec0..bd8abaa0d 100644
--- a/m4/sysexits.m4
+++ b/m4/sysexits.m4
@@ -1,15 +1,44 @@
-# 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 6
+dnl Copyright (C) 2003, 2005, 2007, 2009-2013 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 $ac_cv_header_sysexits_h = yes; then
+    HAVE_SYSEXITS_H=1
+    gl_CHECK_NEXT_HEADERS([sysexits.h])
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sysexits.h>]],
+        [[switch (0)
+          {
+          case EX_OK:
+          case EX_USAGE:
+          case EX_DATAERR:
+          case EX_NOINPUT:
+          case EX_NOUSER:
+          case EX_NOHOST:
+          case EX_UNAVAILABLE:
+          case EX_SOFTWARE:
+          case EX_OSERR:
+          case EX_OSFILE:
+          case EX_CANTCREAT:
+          case EX_IOERR:
+          case EX_TEMPFAIL:
+          case EX_PROTOCOL:
+          case EX_NOPERM:
+          case EX_CONFIG:
+            break;
+          }
+        ]])],
+      [SYSEXITS_H=],
+      [SYSEXITS_H=sysexits.h])
+  else
+    HAVE_SYSEXITS_H=0
+    SYSEXITS_H=sysexits.h
+  fi
+  AC_SUBST([HAVE_SYSEXITS_H])
   AC_SUBST([SYSEXITS_H])
+  AM_CONDITIONAL([GL_GENERATE_SYSEXITS_H], [test -n "$SYSEXITS_H"])
 ])