commit 67ed25f3a648a7d688a57a57da75eaf4881d4e46
author Ying Wang <wangying@google.com> Fri Jun 06 11:17:34 2014 -0700
committer Ying Wang <wangying@google.com> Fri Jun 06 11:18:04 2014 -0700
tree 80a5e0d6c7461b8afd0ad78375e5211924d15a88
parent e564c0cbd08c728d84e62308c741b30f3bd542f8

Reenable ccache.

The previous commit 994c84fb virtually disabled ccache, due to the
deferred evaluation of CC_WRAPPER/CXX_WRAPPER.

Change-Id: Ie0d70a23a55190bd9b24b72edc9158b6976e1d5d

core/combo/select.mk

diff --git a/core/combo/select.mk b/core/combo/select.mk
index 98697e0..e18cb1b 100644
--- a/core/combo/select.mk
+++ b/core/combo/select.mk
@@ -92,8 +92,12 @@
   # Check that the executable is here.
   ccache := $(strip $(wildcard $(ccache)))
   ifdef ccache
-    CC_WRAPPER ?= $(ccache)
-    CXX_WRAPPER ?= $(ccache)
+    ifndef CC_WRAPPER
+      CC_WRAPPER := $(ccache)
+    endif
+    ifndef CXX_WRAPPER
+      CXX_WRAPPER := $(ccache)
+    endif
     ccache =
   endif
 endif