openwrt lib库makefile

1. 顶层Makefile

   #huaiye
   include $(TOPDIR)/rules.mk
   
   PKG_NAME:=libcommon
   
   
   include $(INCLUDE_DIR)/package.mk
   
   define Package/libcommon
   	CATEGORY:=xxx
   	TITLE:=common library
   	VERSION:=v0.1
   	DEPENDS:=
   endef
   
   
   	
   define Package/libcommon/description
   endef
   
   # The linker can identify unused sections of a binary when each symbol is stored
   # in a separate section. This mostly removes unused linker sections and reduces
   # the size by ~3% on mipsel.
   
   TARGET_CFLAGS  += -ffunction-sections -fdata-sections
   TARGET_LDFLAGS += -Wl,--gc-sections
   
   # Link-time optimization allows to move parts of the optimization from the single
   # source file to the global source view. This is done by emitting the GIMPLE
   # representation in each object file and analyzing it again during the link step.
   
   TARGET_CFLAGS  += -flto
   TARGET_LDFLAGS += -fuse-linker-plugin
   TARGET_CFLAGS += -fPIC
   
   TARGET_CFLAGS += \
   	-Wall -W -std=gnu99 -fno-strict-aliasing -MD -MP \
   	-I$(STAGING_DIR)/usr/include/libnl-tiny \
   	-I$(STAGING_DIR)/usr/include \
   	-I$(STAGING_DIR)/include \
   	-I$(TOOLCHAIN_DIR)/usr/include \
   	-I$(TOOLCHAIN_DIR)/include/fortify \
   	-I$(TOOLCHAIN_DIR)/include \
   	-D_GNU_SOURCE
   
   define Build/Compile
   	$(MAKE) -C $(PKG_BUILD_DIR) \
   		$(TARGET_CONFIGURE_OPTS) CFLAGS="$(TARGET_CFLAGS)"
   endef
   
   
   define Build/InstallDev
   	$(INSTALL_DIR) $(1)/usr/include/
   	$(CP)	$(PKG_BUILD_DIR)/*.h $(1)/usr/include/
   	$(INSTALL_DIR) $(1)/usr/lib
   	$(INSTALL_BIN) $(PKG_BUILD_DIR)/$(PKG_NAME).so $(1)/usr/lib/
   endef
   
   
   define Package/libcommon/install
   	$(INSTALL_DIR) $(1)/lib
   	$(INSTALL_BIN) $(PKG_BUILD_DIR)/$(PKG_NAME).so $(1)/lib/
   endef
   
   
   $(eval $(call BuildPackage,libcommon))
   

    

2. 里层Makefile

   OUTPUT_NAME=libcommon.so
   OBJECTS =common_file.o common_network.o common_time.o
   
   all: $(OBJECTS)
   	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJECTS) -shared -o $(OUTPUT_NAME)
   
   clean:
   	@echo Make clean in 'pwd'