build: decouple the mips16 support flag from the toolchain

Add the flags from package.mk instead, and leave libc and gcc
unaffected.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 37770

include/package.mk

@@ -13,6 +13,7 @@ PKG_BUILD_DIR ?= $(BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
 PKG_INSTALL_DIR ?= $(PKG_BUILD_DIR)/ipkg-install
 PKG_MD5SUM ?= unknown
 PKG_BUILD_PARALLEL ?=
+PKG_USE_MIPS16 ?= 1
 
 ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
   MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) -j)
@@ -26,6 +27,12 @@ else
 PKG_JOBS?=$(if $(PKG_BUILD_PARALLEL)$(CONFIG_PKG_DEFAULT_PARALLEL),\
 	$(if $(CONFIG_PKG_BUILD_PARALLEL),$(MAKE_J),-j1),-j1)
 endif
+ifdef CONFIG_HAS_MIPS16
+  ifeq ($(strip $(PKG_USE_MIPS16)),1)
+    TARGET_ASFLAGS_DEFAULT = $(filter-out -mips16 -minterlink-mips16,$(TARGET_CFLAGS))
+    TARGET_CFLAGS += -mips16 -minterlink-mips16
+  endif
+endif
 
 include $(INCLUDE_DIR)/prereq.mk
 include $(INCLUDE_DIR)/host.mk

rules.mk

@@ -70,13 +70,6 @@ endif
 ifneq ($(filter -mdspr2,$(TARGET_OPTIMIZATION)),)
   ARCH_SUFFIX:=$(ARCH_SUFFIX)_dspr2
 endif
-ifdef CONFIG_USE_MIPS16
-   TARGET_OPTIMIZATION+= -minterlink-mips16 -mips16
-endif
-ifneq ($(findstring -mips16,$(TARGET_OPTIMIZATION)),)
-  TARGET_ASFLAGS_OVERRIDE:=-mno-mips16
-  ARCH_SUFFIX:= $(ARCH_SUFFIX)_m16
-endif
 ifdef CONFIG_HAS_SPE_FPU
   TARGET_SUFFIX:=$(TARGET_SUFFIX)spe
 endif
@@ -130,7 +123,8 @@ PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
 TARGET_PATH:=$(STAGING_DIR_HOST)/bin:$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
 TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3) $(EXTRA_OPTIMIZATION)
 TARGET_CXXFLAGS = $(TARGET_CFLAGS)
-TARGET_ASFLAGS = $(TARGET_CFLAGS) $(TARGET_ASFLAGS_OVERRIDE)
+TARGET_ASFLAGS_DEFAULT = $(TARGET_CFLAGS)
+TARGET_ASFLAGS = $(TARGET_ASFLAGS_DEFAULT)
 TARGET_CPPFLAGS:=-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/include
 TARGET_LDFLAGS:=-L$(STAGING_DIR)/usr/lib -L$(STAGING_DIR)/lib
 ifneq ($(CONFIG_EXTERNAL_TOOLCHAIN),)

toolchain/uClibc/common.mk

@@ -45,8 +45,6 @@ GEN_CONFIG=$(SCRIPT_DIR)/kconfig.pl -n \
 			$(if $(CONFIG_MIPS64_ABI),.$(subst ",,$(CONFIG_MIPS64_ABI)), \
 			$(if $(CONFIG_HAS_SPE_FPU),$(if $(wildcard $(CONFIG_DIR)/$(ARCH).e500),.e500)))))
 
-TARGET_CFLAGS := $(filter-out -mips16,$(TARGET_CFLAGS))
-
 CPU_CFLAGS = \
 	-funsigned-char -fno-builtin -fno-asm \
 	--std=gnu99 -ffunction-sections -fdata-sections \