From b1377a323b8484167c48651c8af209d89d4ca306 Mon Sep 17 00:00:00 2001
From: minux <minux.ma@gmail.com>
Date: Sat, 22 Dec 2012 19:41:36 +0800
Subject: [PATCH] Makefile.common: don't export CC, AR, ... to sub-make

Or we might prepend "@echo .." two times.
Reproduced by: CC=gcc make

Signed-off-by: minux <minux.ma@gmail.com>
---
 Makefile.common | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Makefile.common b/Makefile.common
index 834b815..d454321 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -43,6 +43,10 @@ else
     DEPEND	= $(DEPEND_quiet)
     RANLIB	= $(RANLIB_quiet)
 endif
+# because all sub Makefiles also include this file, no need to pass down
+# these variables. or we risk producing "@echo ... && @echo ... && cc .."
+# which is not correct.
+unexport CC AR DEPEND RANLIB
 
 # ----- Dependencies ----------------------------------------------------------