OpenWrt adding modules Makefile and config.in

Add Module compilation

Found on the internet, a lot of information about compiling OPENWRT system, but these things chip manufacturers to provide the development package has been completed, but did not find the system introduced the information, add a package of introduction there are not many, of which there are two very valuable reference:

http://blog.csdn.net/lj627889343/article/details/7997463

http://kamikaze.openwrt.org/docs/openwrt.html#x1-460002.1.2

The detailed steps are as follows:

Create the module directory My_module in the package directory, including:

Makefile is used to establish a OPENWRT connection and become a package of openwrt.

src contains its own code

src/hello.c Source code

src/makefile source code for Makefile

The following will mainly explain the current system makefile understanding:

Include $ (TOPDIR)/rules.mk must contain
#include $ (include_dir)/kernel.mk kernel module included, currently not required

Pkg_name:=my_module package name, displayed in Menuconfig
pkg_version:=0.0.1 Package Version number
Pkg_base_name:=my_module package name, create pkg_base_name-pkg_version directory under Build_dir, for storing source code
#PKG_SOURCE: =$ (pkg_base_name)-$ (pkg_version). tar.gz
pkg_build_dir:=$ (Build_dir)/$ (pkg_base_name)-$ (pkg_version) specify code storage path
#PKG_RELEASE: =1
#PKG_SOURCE_URL: =http://localhost
pkg_build_depends:=
Pkg_bin_dir= commented on three items in order to not allow OpenWrt to download the code (and copy the code from the local, see instructions later)

Include $ (include_dir)/package-version-override.mk don't know what to do with, it should be a must
Include $ (include_dir)/package.mk don't know what to do with, it should be a must

Ifeq ($ (DUMP),)                                                                                           don't know what to do with
 stamp_configured:=$ (Strip $ (stamp_configured)) _$ (Shell $ (sh_func) grep ' ^config_gpon_ ' $ (topdir)/.config | md5s )
EndIf

Define package/$ (Pkg_name) options for setting the Menuconfig
Section:=application do not know what to do with, similar options have net/sys/driver. . should be a classification of Linux systems
Category:=teddy menuconfig Top Directory
Title:=the first module by Teddy Directory entry description for this package (catalog item name is package name)
url:=http://www.teddy.com/don't know what to do with it, it's not very useful.
Maintainer:=teddy don't know what to do with it, it's not very useful.
Depends:= depends on the package, and will not be used
Menu:=1 directory entry enable if the base module can be set to 0
Endef

Define package/$ (Pkg_name)/description don't know what to do, it's not very useful.
Teddy ' s first package on OpenWRT.
Endef

Define package/$ (Pkg_name)/config combines config/config.in to set more complex catalog items without
Menu "Detail Configurations" first option, set by developer
Depends on package_$ (pkg_name)
SOURCE "$ (source)/config/config.in"
Endmenu
$ (call package/$ (pkg_name)/override_version) The second option, provided by the system, should be another specified version number
$ (call package/$ (pkg_name)/override_source_path) The third option, which is provided by the system, should be specified in the code to store the path
Endef

Configure_args + =

Ifeq ($ (config_mips), y)                                                                             don't know what to do with
Configure_args + =--enable-add_drv_cflags= "-fno-pic-mno-abicalls-mlong-calls-g 0"
endif

Define build/prepare                                                                                    This is the key, on the above canceled from the network download, by the statement here to copy the SRC code to the specified location
 mkdir-p $ (Pkg_build_dir)
 $ (CP)./src/* $ (pkg_build_dir)/
Endef

Define build/clean                                                                                          clear statements, no use for
 @-RM-RF $ (pkg_build_dir)/ipkg*
 @-[-E $ (pkg_build_dir)/makefile] && $ (make)-C $ (pkg_build_dir ) Clean
 $ (call Build/clean/default)
Endef

Define package/$ (pkg_name)/install forget what to do with, it seems to be used to create a directory, no this sentence will cause the compilation but
$ (Install_dir) $ (1)/$ (Pkg_bin_dir)
Endef

$ (eval $ (call buildpackage,$ (pkg_name))) must be

You can also create

Config/config.in

For detail definitions, such as

Menu "Macros"
Config First_macro here the config value can be used by makefile, but not yet Found source code can be used
BOOL "First macro defined in my module"
Default Y
Config Second_macro
BOOL "Second macro defined in my module"
Default Y
Endmenu

OpenWrt adding modules Makefile and config.in