From 0f875c3664467ff73578818ed2f0e77513c0ad01 Mon Sep 17 00:00:00 2001
From: Russell Bryant <russell@russellbryant.com>
Date: Wed, 28 Jun 2006 21:33:39 +0000
Subject: ?= just checks to see if a variable is not yet defined.  If
 MENUSELECT_CFLAGS was not found in the user level makeopts file, the variable
 is defined, but empty.

I wish we could just require GNU make 3.81  :)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@36229 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index bbf3a6699..bebfbb8d6 100644
--- a/Makefile
+++ b/Makefile
@@ -134,7 +134,9 @@ OTHER_SUBDIR_CFLAGS=-I../include -I..
 
 ifeq ($(origin MENUSELECT_CFLAGS),undefined)
   MENUSELECT_CFLAGS:=$(shell grep MENUSELECT_CFLAGS $(USER_MAKEOPTS) .)
-  MENUSELECT_CFLAGS?=$(shell grep MENUSELECT_CFLAGS $(GLOBAL_MAKEOPTS) .)
+  ifeq ($(MENUSELECT_CFLAGS),)
+    MENUSELECT_CFLAGS:=$(shell grep MENUSELECT_CFLAGS $(GLOBAL_MAKEOPTS) .)
+  endif
   ifneq ($(MENUSELECT_CFLAGS),)
     MENUSELECT_CFLAGS:=$(shell echo $(MENUSELECT_CFLAGS) | cut -f2 -d'=')
   endif
-- 
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