cirros-testvm/src-cirros/buildroot-2015.05/build/docs/manual/customize-quick-guide.txt

   1 // -*- mode:doc; -*-
   2 // vim: set syntax=asciidoc:
   3
   4 === Quick guide to storing your project-specific customizations
   5
   6 Earlier in this chapter, the different methods for making
   7 project-specific customizations have been described. This section will
   8 now summarize all this by providing step-by-step instructions to storing your
   9 project-specific customizations. Clearly, the steps that are not relevant to
  10 your project can be skipped.
  11
  12 1. +make menuconfig+ to configure toolchain, packages and kernel.
  13 1. +make linux-menuconfig+ to update the kernel config, similar for
  14    other configuration like busybox, uclibc, ...
  15 1. +mkdir -p board/<manufacturer>/<boardname>+
  16 1. Set the following options to +board/<manufacturer>/<boardname>/<package>.config+
  17    (as far as they are relevant):
  18    * +BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE+
  19    * +BR2_PACKAGE_BUSYBOX_CONFIG+
  20    * +BR2_UCLIBC_CONFIG+
  21    * +BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_CONFIG_FILE+
  22    * +BR2_TARGET_BAREBOX_CUSTOM_CONFIG_FILE+
  23 1. Write the configuration files:
  24    * +make linux-update-defconfig+
  25    * +make busybox-update-config+
  26    * +make uclibc-update-config+
  27    * +cp <output>/build/at91bootstrap3-*/.config
  28      board/<manufacturer>/<boardname>/at91bootstrap3.config+
  29    * +make barebox-update-defconfig+
  30 1. Create +board/<manufacturer>/<boardname>/rootfs-overlay/+ and fill it
  31    with additional files you need on your rootfs, e.g.
  32    +board/<manufacturer>/<boardname>/rootfs-overlay/etc/inittab+.
  33    Set +BR2_ROOTFS_OVERLAY+
  34    to +board/<manufacturer>/<boardname>/rootfs-overlay+.
  35 1. Create a post-build script
  36    +board/<manufacturer>/<boardname>/post_build.sh+. Set
  37    +BR2_ROOTFS_POST_BUILD_SCRIPT+ to
  38    +board/<manufacturer>/<boardname>/post_build.sh+
  39 1. If additional setuid permissions have to be set or device nodes have
  40    to be created, create +board/<manufacturer>/<boardname>/device_table.txt+
  41    and add that path to +BR2_ROOTFS_DEVICE_TABLE+.
  42 1. If additional user accounts have to be created, create
  43    +board/<manufacturer>/<boardname>/users_table.txt+ and add that path
  44    to +BR2_ROOTFS_USERS_TABLES+.
  45 1. To add custom patches to certain packages, set +BR2_GLOBAL_PATCH_DIR+
  46    to +board/<manufacturer>/<boardname>/patches/+ and add your patches
  47    for each package in a subdirectory named after the package. Each
  48    patch should be called +<packagename>-<num>-<description>.patch+.
  49 1. Specifically for the Linux kernel, there also exists the option
  50    +BR2_LINUX_KERNEL_PATCH+ with as main advantage that it can also
  51    download patches from a URL. If you do not need this,
  52    +BR2_GLOBAL_PATCH_DIR+ is preferred. U-Boot, Barebox, at91bootstrap
  53    and at91bootstrap3 also have separate options, but these do not
  54    provide any advantage over +BR2_GLOBAL_PATCH_DIR+ and will likely be
  55    removed in the future.
  56 1. If you need to add project-specific packages, create
  57    +package/<manufacturer>/+ and place your packages in that
  58    directory. Create an overall +<manufacturer>.mk+ file that
  59    includes the +.mk+ files of all your packages. Create an overall
  60    +Config.in+ file that sources the +Config.in+ files of all your
  61    packages. Include this +Config.in+ file from Buildroot's
  62    +package/Config.in+ file.
  63 1. +make savedefconfig+ to save the buildroot configuration.
  64 1. +cp defconfig configs/<boardname>_defconfig+