X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsysexits.m4;h=cff6606c6e14635b9e78286c1c837aee1c1b823e;hb=c604bb86746f7f16471a598df94845e42d0e1b5f;hp=aaa94e8493bf160759407693fa8da299a9f04d97;hpb=44d7c1c1f004fa9bfb8ec3948de2671a7958cf5b;p=gnulib.git

diff --git a/m4/sysexits.m4 b/m4/sysexits.m4
index aaa94e849..cff6606c6 100644
--- a/m4/sysexits.m4
+++ b/m4/sysexits.m4
@@ -1,13 +1,44 @@
-# sysexits.m4 serial 2
-dnl Copyright (C) 2003 Free Software Foundation, Inc.
+# sysexits.m4 serial 6
+dnl Copyright (C) 2003, 2005, 2007, 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,
 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"])
 ])