From f3ff1430af1c3d5820f7f522c0825986419edb83 Mon Sep 17 00:00:00 2001
From: Travis Geiselbrecht <geist@foobox.com>
Date: Fri, 8 Aug 2014 15:59:09 -0700
Subject: [PATCH] [make] extend the top level make file to set the root of lk
 and pass toolchain_prefix via make variable

---
 makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/makefile b/makefile
index bc38c848..f0452ce5 100644
--- a/makefile
+++ b/makefile
@@ -2,14 +2,16 @@
 # directories to be included in the build
 -include lk_inc.mk
 
+LKMAKEROOT ?= .
 LKROOT ?= .
 LKINC ?=
+TOOLCHAIN_PREFIX ?=
 
 LKINC := $(LKROOT) $(LKINC)
 
 # vaneer makefile that calls into the engine with lk as the build root
 # if we're the top level invocation, call ourselves with additional args
 $(MAKECMDGOALS) _top:
-	LKROOT=$(LKROOT) LKINC="$(LKINC)" $(MAKE) -rR -f $(LKROOT)/engine.mk $(addprefix -I,$(LKINC)) $(MAKECMDGOALS)
+	TOOLCHAIN_PREFIX=$(TOOLCHAIN_PREFIX) LKROOT=$(LKROOT) LKINC="$(LKINC)" $(MAKE) -C $(LKMAKEROOT) -rR -f $(LKROOT)/engine.mk $(addprefix -I,$(LKINC)) $(MAKECMDGOALS)
 
 .PHONY: _top