include $(TOPDIR)/rules.mk # Name, version and release number # The name and version of your package are used to define the variable to point to the build directory of your package: $(PKG_BUILD_DIR) PKG_NAME:=helloworld PKG_VERSION:=1.0 PKG_RELEASE:=1 # Source settings (i.e. where to find the source codes) # This is a custom variable, used below SOURCE_DIR:=/home/buildbot/helloworld include $(INCLUDE_DIR)/package.mk # Package definition; instructs on how and where our package will appear in the overall configuration menu ('make menuconfig') define Package/helloworld SECTION:=examples CATEGORY:=Examples TITLE:=Hello, World! endef # Package description; a more verbose description on what our package does define Package/helloworld/description A simple "Hello, world!" -application. endef # Package preparation instructions; create the build directory and copy the source code. # The last command is necessary to ensure our preparation instructions remain compatible with the patching system. define Build/Prepare mkdir -p $(PKG_BUILD_DIR) cp $(SOURCE_DIR)/* $(PKG_BUILD_DIR) $(Build/Patch) endef # Package build instructions; invoke the target-specific compiler to first compile the source file, and then to link the file into the final executable define Build/Compile $(TARGET_CC) $(TARGET_CFLAGS) -o $(PKG_BUILD_DIR)/helloworld.o -c $(PKG_BUILD_DIR)/helloworld.c $(TARGET_CC) $(TARGET_LDFLAGS) -o $(PKG_BUILD_DIR)/$1 $(PKG_BUILD_DIR)/helloworld.o endef # Package install instructions; create a directory inside the package to hold our executable, and then copy the executable we built previously into the folder define Package/helloworld/install $(INSTALL_DIR) $(1)/usr/bin $(INSTALL_BIN) $(PKG_BUILD_DIR)/helloworld $(1)/usr/bin endef # This command is always the last, it uses the definitions and variables we give above in order to get the job done $(eval $(call BuildPackage,helloworld))