sysexits.m4

gnu tar 源码包。 tar 软件是 Unix 系统下的一个打包软件

# 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_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])
])