■ 준비 작업
$ cd /home/hasu0707/ar71xx/sdk
$ make prereq
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■ /home/hasu0707/ar71xx/sdk/package/hello/src/hello.c
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#include <stdio.h>
int main(int argc, char *argv[])
{
printf("Hello, world\n");
return 0;
}
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■ /home/hasu0707/ar71xx/sdk/package/hello/src/Makefile
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hello : hello.c
${CC} -o hello hello.c
clean :
rm -f hello
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■ /home/hasu0707/ar71xx/sdk/package/hello/Makefile
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include $(TOPDIR)/rules.mk
# Name and release number of this package
PKG_NAME:=hello
PKG_RELEASE:=1
PKG_VERSION:=0.0.1
PKG_CAT:=zcat
# This specifies the directory where we're going to build the program.
# The root build directory, $(BUILD_DIR), is by default the build_mipsel
# directory in your OpenWrt SDK directory
PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
include $(INCLUDE_DIR)/package.mk
# Specify package information for this program.
# The variables defined here should be self explanatory.
define Package/hello
SECTION:=utils
CATEGORY:=Utilities
TITLE:=Helloworld -- prints a snarky message
endef
# Specify what needs to be done to prepare for building the package.
# In our case, we need to copy the source files to the build directory.
# This is NOT the default. The default uses the PKG_SOURCE_URL and the
# PKG_SOURCE which is not defined here to download the source from the web.
# In order to just build a simple program that we have just written, it is
# much easier to do it this way.
define Build/Prepare
mkdir -p $(PKG_BUILD_DIR)
$(CP) ./src/* $(PKG_BUILD_DIR)/
endef
# We do not need to define Build/Configure or Build/Compile directives
# The defaults are appropriate for compiling a simple program such as this one
# Specify where and how to install the program. Since we only have one file,
# the hello executable, install it by copying it to the /bin directory on
# the router. The $(1) variable represents the root directory on the router running
# OpenWrt. The $(INSTALL_DIR) variable contains a command to prepare the install
# directory if it does not already exist. Likewise $(INSTALL_BIN) contains the
# command to copy the binary file from its current location (in our case the build
# directory) to the install directory.
define Package/hello/install
$(INSTALL_DIR) $(1)/bin
$(INSTALL_BIN) $(PKG_BUILD_DIR)/hello $(1)/bin/
endef
# This line executes the necessary commands to compile our program.
# The above define directives specify all the information needed, but this
# line calls BuildPackage which in turn actually uses this information to
# build a package.
$(eval $(call BuildPackage,hello))
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■ 패키지를 만든다.
$ cd /home/hasu0707/ar71xx/sdk
$ make clean && make world
make[1] world
make[2] package/compile
make[3] -C package/hello compile
make[2] package/index
■ 결과를 확인한다.
$ cd /home/hasu0707/ar71xx/sdk/bin/ar71xx/packages
$ ls -l
-rw-r--r-- 1 hasu0707 users 406 2014-05-02 16:00 Packages
-rw-r--r-- 1 hasu0707 users 316 2014-05-02 16:00 Packages.gz
-rw-r--r-- 1 hasu0707 users 1757 2014-05-02 16:00 hello_0.0.1-1_ar71xx.ipk