From 8dd2664a2258f1dacc59736b66e3bd5399df0439 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Thu, 8 Mar 2007 03:48:30 +0000 Subject: [PATCH] Make self-contained, i.e. make it possible to include it without prior . --- m4/sys_select_h.m4 | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) diff --git a/m4/sys_select_h.m4 b/m4/sys_select_h.m4 index f7070fad8..7fe67dff8 100644 --- a/m4/sys_select_h.m4 +++ b/m4/sys_select_h.m4 @@ -1,18 +1,32 @@ -# sys_select_h.m4 serial 1 -dnl Copyright (C) 2006 Free Software Foundation, Inc. +# sys_select_h.m4 serial 2 +dnl Copyright (C) 2006-2007 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. -dnl Adapted from arpa_inet.m4, written by Simon Josefsson. - AC_DEFUN([gl_HEADER_SYS_SELECT], [ - AC_CHECK_HEADERS_ONCE([sys/select.h]) - if test $ac_cv_header_sys_select_h = yes; then + AC_CACHE_CHECK([whether is self-contained], + [gl_cv_header_sys_select_h_selfcontained], + [ + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include ], [])], + [gl_cv_header_sys_select_h_selfcontained=yes], + [gl_cv_header_sys_select_h_selfcontained=no]) + ]) + if test $gl_cv_header_sys_select_h_selfcontained = yes; then SYS_SELECT_H='' else SYS_SELECT_H='sys/select.h' + AC_CHECK_HEADERS([sys/select.h]) + gl_ABSOLUTE_HEADER([sys/select.h]) + ABSOLUTE_SYS_SELECT_H=\"$gl_cv_absolute_sys_select_h\" + AC_SUBST([ABSOLUTE_SYS_SELECT_H]) + if test $ac_cv_header_sys_select_h = yes; then + HAVE_SYS_SELECT_H=1 + else + HAVE_SYS_SELECT_H=0 + fi + AC_SUBST([HAVE_SYS_SELECT_H]) fi - AC_SUBST(SYS_SELECT_H) + AC_SUBST([SYS_SELECT_H]) ]) -- 2.11.0