-# strsignal.m4 serial 6
+# strsignal.m4 serial 8
dnl Copyright (C) 2008-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
# Prerequisites of lib/strsignal.c.
AC_DEFUN([gl_PREREQ_STRSIGNAL], [
+ AC_CHECK_HEADERS_ONCE([unistd.h])
AC_REQUIRE([AC_DECL_SYS_SIGLIST])
- AC_CHECK_DECLS([_sys_siglist], [], [], [#include <signal.h>])
+ AC_CHECK_DECLS([_sys_siglist], [], [], [[#include <signal.h>]])
])