From d23a23db10f3b22dbd44c897f349cd2f556173de Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Wed, 15 Apr 2009 22:23:46 +0200
Subject: configure.ac: added function MPD_AUTO_PRE

This function checks whether a prerequisite for a feature was found.
---
 m4/mpd_auto.m4 | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'm4')

diff --git a/m4/mpd_auto.m4 b/m4/mpd_auto.m4
index a35c9cf1b..3f233938f 100644
--- a/m4/mpd_auto.m4
+++ b/m4/mpd_auto.m4
@@ -21,6 +21,21 @@ AC_DEFUN([MPD_AUTO_DISABLED], [
 	fi
 ])
 
+dnl Check whether a prerequisite for a feature was found.  This is
+dnl very similar to MPD_AUTO_RESULT, but does not finalize the
+dnl detection; it assumes that more checks will follow.
+AC_DEFUN([MPD_AUTO_PRE], [
+	name="$1"
+	var="enable_$1"
+	found="found_$name"
+	feature="$2"
+	msg="$3"
+
+	if eval "test x`echo '$'$var` != xno" && eval "test x`echo '$'$found` = xno"; then
+                MPD_AUTO_DISABLED([$name], [$feature], [$msg])
+	fi
+])
+
 AC_DEFUN([MPD_AUTO_RESULT], [
 	name="$1"
 	var="enable_$1"
-- 
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