Openwrt Study Notes

Compile openwrt-index with http://blog.csdn.net/openme_openwrt/article/details/7348452

Wiki navigation: http://wiki.openwrt.org/doc/start

Compile openwrt
Early openwrt compilation documentation: http://downloads.openwrt.org/docs/buildroot-documentation.html#about

1 tool chain: http://wiki.openwrt.org/about/toolchain

2 Preparation: http://wiki.openwrt.org/doc/howto/buildroot.exigence

3 compile: http://wiki.openwrt.org/doc/howto/build

4 Add feeds: Http://wiki.openwrt.org/doc/devel/feeds

5 image builder: http://wiki.openwrt.org/doc/howto/obtain.firmware.generate

6 SDK:Http://wiki.openwrt.org/doc/howto/obtain.firmware.sdk

7 rootfs on External Storage (extroot ):

Http://wiki.openwrt.org/doc/howtobuild/extroot.howtobuild

Http://wiki.openwrt.org/doc/howto/extroot

8 wireless router which is connected to either a wired, a wireless or a 3G wireless connection:

Http://wiki.openwrt.org/doc/howtobuild/wireless-router-with-a-3g-dongle

9 how to build a single package

Http://wiki.openwrt.org/doc/howtobuild/single.package

Developing Development

1 cross compile: http://wiki.openwrt.org/doc/devel/crosscompile

External compiler settings

Https://forum.openwrt.org/viewtopic.php? Id = 32330

Https://forum.openwrt.org/viewtopic.php? Id = 29804

Https://forum.openwrt.org/viewtopic.php? Id = 12436

Internal compiler settings

2 creating packages:Http://wiki.openwrt.org/doc/devel/packages

3 feeds:Http://wiki.openwrt.org/doc/devel/feeds

4 using dependencies: http://wiki.openwrt.org/doc/devel/dependencies

5 How to submit patches to openwrt:

Https://dev.openwrt.org/wiki/SubmittingPatches

6 external toolchain-Use openwrt as external toolchain

Http://wiki.openwrt.org/doc/howto/external_toolchain

Https://lists.openwrt.org/pipermail/openwrt-devel/2009-February/003774.html

Http://blog.csdn.net/openme_openwrt/article/details/8299215 openwrt method for removing strip or resetting strip Parameters

Http://andelf.diandian.com/post/2013-05-22/40050677370 add new device

Http://wiki.openwrt.org/doc/devel/packages production package reference

Section: = segment of the Base in opkg
Category: = classification of network in menuconfig
Default: = y is selected by default in menuconfig.
Pkg_release is similar to the tail sub-version of the arch package, refer to i2c-gpio-custom, kernel. mk package-default.mk

Pkg_cat-how to decompress the sources (zcat, bzcat, unzip)

• Pkg_name-the name of the package, as seen via menuconfig and ipkg

• Pkg_version-the upstream version number that we're re downloading

• Pkg_release-the version of this package makefile

• Pkg_license-the license (s) the package is available under, spdx form.

• Pkg_license_file-file containing the license text

• Pkg_build_dir-Where to compile the package

• Pkg_source-the filename of the original sources

• Pkg_source_url-Where to download the sources from (directory)

• Pkg_md5sum-a checksum to validate the download

• Pkg_cat-how to decompress the sources (zcat, bzcat, unzip)

• Pkg_build_depends-packages that need to be built before this package, but are not required at runtime. uses the same syntax as depends below.

• Pkg_install-setting it to "1" will call the package's original "make install" with prefix set to pkg_install_dir

• Pkg_install_dir-Where "make install" copies the compiled files

• Pkg_fixup -???

Adding configuration options

If you wowould like configure your package installation/compilation in the menuconfig you can do the following: Add menu: = 1 to your package definition like this:

define Package/mjpg-streamer  SECTION:=multimedia  CATEGORY:=Multimedia  TITLE:=MJPG-streamer  DEPENDS:[email protected]!LINUX_2_4 +libpthread-stubs +jpeg  URL:=http://mjpg-streamer.wiki.sourceforge.net/  MENU:=1endef

Create a Config Key in the makefile:

define Package/mjpg-streamer/configsource "$(SOURCE)/Config.in"endef

And finally you can check your configuration parameters in your makefile in the following way: (Note that you can reference to the parameters value with it name prefixed with config _)

ifeq ($(CONFIG_MJPEG_STREAMER_INPUT_UVC),y)$(CP) $(PKG_BUILD_DIR)/input_uvc.so $(1)/usr/libendif

Kernel module autoload

  AUTOLOAD:=$(call AutoLoad,30,loop)

define Build/InstallDev$(INSTALL_DIR) $(STAGING_DIR)/usr/include/madwifiendef

Http://wiki.openwrt.org/doc/devel/dependencies dependency, close look

In depends @ gpio_support will appear in depends in menuconfig, and other sub-packages + kmod-i2c-core will not appear in it, will be referenced by opkg's package dependency

Extra_kconfig: = config_spi_gpio_custom = m (SPI-gpio-custom package)

Extra_cflags

Autoload indicates that it will be automatically loaded and put into/etc/modules. d/

Files

Pkg_build_parallel parallel Compilation

Http://wiki.openwrt.org/doc/devel/feeds add custom feed method using Src-link local Link Method

Src-link customfeed/home/user/openwrt/project/Packages

Pkg_file_depends and pkg_build_depneds: = opkg/Host

Reference base-files example

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