From 2d9806dfaa6cc55c0a48c4ac8a46b42e05a5c933 Mon Sep 17 00:00:00 2001
From: cracyc <cracyc@users.noreply.github.com>
Date: Thu, 30 May 2013 16:51:18 +0000
Subject: [PATCH] windows.mak: use := for variables set by external programs
 (nw)

---
 src/osd/windows/windows.mak | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/osd/windows/windows.mak b/src/osd/windows/windows.mak
index 07dfcded84d..3229b96fbd4 100644
--- a/src/osd/windows/windows.mak
+++ b/src/osd/windows/windows.mak
@@ -257,7 +257,7 @@ CCOMFLAGS += -include $(WINSRC)/winprefix.h
 # ensure we statically link the gcc runtime lib
 LDFLAGS += -static-libgcc
 # TODO: needs to use $(CC)
-TEST_GCC = $(shell gcc --version)
+TEST_GCC := $(shell gcc --version)
 ifeq ($(findstring 4.4.,$(TEST_GCC)),)
 	#if we use new tools
 	LDFLAGS += -static-libstdc++
@@ -345,8 +345,9 @@ RESFILE = $(WINOBJ)/mame.res
 # QT Debug library
 #-------------------------------------------------
 ifdef USE_QTDEBUG
-QT_INSTALL_HEADERS = $(shell qmake -query QT_INSTALL_HEADERS)
-LIBS += -L$(shell qmake -query QT_INSTALL_LIBS) -lqtmain -lQtGui4 -lQtCore4
+QT_INSTALL_HEADERS := $(shell qmake -query QT_INSTALL_HEADERS)
+QT_LIBS := -L$(shell qmake -query QT_INSTALL_LIBS)
+LIBS += $(QT_LIBS) -lqtmain -lQtGui4 -lQtCore4
 INCPATH += -I$(QT_INSTALL_HEADERS)/QtCore -I$(QT_INSTALL_HEADERS)/QtGui -I$(QT_INSTALL_HEADERS)
 SDLOBJ := $(WINOBJ)/../sdl
 SDLSRC := $(WINSRC)/../sdl