-# sysexits.m4 serial 2
-dnl Copyright (C) 2003 Free Software Foundation, Inc.
+# sysexits.m4 serial 5
+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])
])