build: add TARGET_CXXFLAGS and EXTRA_CXXFLAGS, defaulting to *_CFLAGS via lazy evaluation. this allows adding c++ specific cflags

SVN-Revision: 30760

include/package-defaults.mk

@@ -55,6 +55,8 @@ ifneq ($(strip $(PKG_UNPACK)),)
   endef
 endif
 
+EXTRA_CXXFLAGS = $(EXTRA_CFLAGS)
+
 CONFIGURE_PREFIX:=/usr
 CONFIGURE_ARGS = \
 		--target=$(GNU_TARGET_NAME) \
@@ -79,7 +81,7 @@ CONFIGURE_ARGS = \
 CONFIGURE_VARS = \
 		$(TARGET_CONFIGURE_OPTS) \
 		CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
-		CXXFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
+		CXXFLAGS="$(TARGET_CXXFLAGS) $(EXTRA_CFLAGS)" \
 		CPPFLAGS="$(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
 		LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS)" \
 
@@ -104,7 +106,7 @@ endef
 
 MAKE_VARS = \
 	CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS) $(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
-	CXXFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS) $(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
+	CXXFLAGS="$(TARGET_CXXFLAGS) $(EXTRA_CXXFLAGS) $(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
 	LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS)"
 
 MAKE_FLAGS = \

rules.mk

@@ -108,6 +108,7 @@ BUILD_LOG_DIR:=$(TOPDIR)/logs
 
 TARGET_PATH:=$(STAGING_DIR_HOST)/bin:$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
 TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3)
+TARGET_CXXFLAGS = $(TARGET_CFLAGS)
 TARGET_CPPFLAGS:=-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/include
 TARGET_LDFLAGS:=-L$(STAGING_DIR)/usr/lib -L$(STAGING_DIR)/lib
 ifneq ($(CONFIG_EXTERNAL_TOOLCHAIN),)