PKG_BUILD_DIR ?= $(BUILD_DIR)/$(if $(BUILD_VARIANT),$(PKG_NAME)-$(BUILD_VARIANT)/)$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
PKG_INSTALL_DIR ?= $(PKG_BUILD_DIR)/ipkg-install
PKG_BUILD_PARALLEL ?=
-PKG_USE_MIPS16 ?= 1
-PKG_IREMAP ?= 1
PKG_SKIP_DOWNLOAD=$(USE_SOURCE_DIR)$(USE_GIT_TREE)$(USE_GIT_SRC_CHECKOUT)
MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) $(if $(filter 3.% 4.0 4.1,$(MAKE_VERSION)),-j))
else
PKG_JOBS?=$(if $(PKG_BUILD_PARALLEL),$(MAKE_J),-j1)
endif
+
+PKG_BUILD_FLAGS?=
+__unknown_flags=$(filter-out no-iremap no-mips16 gc-sections no-gc-sections lto no-lto,$(PKG_BUILD_FLAGS))
+ifneq ($(__unknown_flags),)
+ $(error unknown PKG_BUILD_FLAGS: $(__unknown_flags))
+endif
+
+# $1=flagname, $2=default (0/1)
+define pkg_build_flag
+$(if $(filter no-$(1),$(PKG_BUILD_FLAGS)),0,$(if $(filter $(1),$(PKG_BUILD_FLAGS)),1,$(2)))
+endef
+
+ifeq ($(call pkg_build_flag,iremap,1),1)
+ IREMAP_CFLAGS = $(call iremap,$(PKG_BUILD_DIR),$(notdir $(PKG_BUILD_DIR)))
+ TARGET_CFLAGS += $(IREMAP_CFLAGS)
+endif
ifdef CONFIG_USE_MIPS16
- ifeq ($(strip $(PKG_USE_MIPS16)),1)
+ ifeq ($(call pkg_build_flag,mips16,1),1)
TARGET_ASFLAGS_DEFAULT = $(filter-out -mips16 -minterlink-mips16,$(TARGET_CFLAGS))
TARGET_CFLAGS += -mips16 -minterlink-mips16
+ TARGET_CXXFLAGS += -mips16 -minterlink-mips16
endif
endif
-ifeq ($(strip $(PKG_IREMAP)),1)
- IREMAP_CFLAGS = $(call iremap,$(PKG_BUILD_DIR),$(notdir $(PKG_BUILD_DIR)))
- TARGET_CFLAGS += $(IREMAP_CFLAGS)
+ifeq ($(call pkg_build_flag,gc-sections,$(if $(CONFIG_USE_GC_SECTIONS),1,0)),1)
+ TARGET_CFLAGS+= -ffunction-sections -fdata-sections
+ TARGET_CXXFLAGS+= -ffunction-sections -fdata-sections
+ TARGET_LDFLAGS+= -Wl,--gc-sections
+endif
+ifeq ($(call pkg_build_flag,lto,$(if $(CONFIG_USE_LTO),1,0)),1)
+ TARGET_CFLAGS+= -flto=auto -fno-fat-lto-objects
+ TARGET_CXXFLAGS+= -flto=auto -fno-fat-lto-objects
+ TARGET_LDFLAGS+= -flto=auto -fuse-linker-plugin
endif
include $(INCLUDE_DIR)/hardening.mk
$(1) : export CONFIG_SITE:=$$(CONFIG_SITE)
$(1) : export PKG_CONFIG_PATH:=$$(PKG_CONFIG_PATH)
$(1) : export PKG_CONFIG_LIBDIR:=$$(PKG_CONFIG_PATH)
+ $(1) : export GIT_CEILING_DIRECTORIES:=$$(BUILD_DIR)
endef
Build/Exports=$(Build/Exports/Default)