add EXTRA_CFLAGS variable support
add EXTRA_CFLAGS variable support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6459 3c298f89-4303-0410-b956-a3cf2f4a3e73

--- a/include/package.mk
+++ b/include/package.mk
@@ -307,9 +307,9 @@
 TARGET_LDFLAGS=-L$(STAGING_DIR)/usr/lib -L$(STAGING_DIR)/lib
 CONFIGURE_VARS:= \
 		$(TARGET_CONFIGURE_OPTS) \
-		CFLAGS="$(TARGET_CFLAGS)" \
-		CXXFLAGS="$(TARGET_CFLAGS)" \
-		CPPFLAGS="$(TARGET_CPPFLAGS)" \
+		CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
+		CXXFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
+		CPPFLAGS="$(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
 		LDFLAGS="$(TARGET_LDFLAGS)" \
 		PKG_CONFIG_PATH="$(STAGING_DIR)/usr/lib/pkgconfig" \
 		PKG_CONFIG_LIBDIR="$(STAGING_DIR)/usr/lib/pkgconfig"
@@ -333,8 +333,8 @@
 endef
 
 MAKE_VARS := \
-	CFLAGS="$(TARGET_CFLAGS)" \
-	CXXFLAGS="$(TARGET_CFLAGS) " \
+	CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
+	CXXFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
 	LDFLAGS="$(EXTRA_LDFLAGS) "
 
 MAKE_FLAGS := \

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