wincred: avoid overwriting configured variables

patthoyts · gitster · commit 248b68f3f29e · 2014-05-14T10:30:07.000-07:00
Signed-off-by: Pat Thoyts &lt;patthoyts@users.sourceforge.net&gt;
Signed-off-by: Stepan Kasal &lt;kasal@ucw.cz&gt;
Acked-by: Erik Faye-Lund &lt;kusmabite@gmail.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/contrib/credential/wincred/Makefile b/contrib/credential/wincred/Makefile
@@ -1,12 +1,12 @@
 all: git-credential-wincred.exe
 
-CC = gcc
-RM = rm -f
-CFLAGS = -O2 -Wall
-
 -include ../../../config.mak.autogen
 -include ../../../config.mak
 
+CC ?= gcc
+RM ?= rm -f
+CFLAGS ?= -O2 -Wall
+
 prefix ?= /usr/local
 libexecdir ?= $(prefix)/libexec/git-core
 
