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Developing MiniArch

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Piotr Oniszczuk edited this page Oct 25, 2024 · 2 revisions

Developing MiniArch

MiniArch (the same like MiniMyth2) uses common build system based on GAR (https://www.linuxjournal.com/article/5819)

Most frequently actions are described here: https://github.com/warpme/minimyth2/wiki/Developing-MiniMyth2

MiniArch related components are in ~/minimyth2/script/miniarch

Example: rebuilding MiniArch image with changed kernel config

  1. do desired changes in kernel config (helpful might be make menuconfig in (mm_home)/script/kernel/kernel-<ver> dir)
  2. go to (mm_home)/script/kernel/kernel-<ver>
  3. run make makesums-all clean
  4. go to (mm_home)/script/meta/miniarch/
  5. run make update-kernel

steep 4 will build image for board you have in $(HOME)/.minimyth2/minimyth.conf file (variable mm_BOARD_TYPE=)- so good practice is to set your desired board in this file. (alternatively - you can again rebuild image for different board by using prepare-miniarch-image.sh script

Example: rebuilding MiniArch image with updated kernel

  1. go to ~/minimyth2/script/kernel/linux-x.y/work/main.d/linux-x.y.z
  2. do desired changes in kernel code
  3. go to ~/minimyth2/script/kernel/linux-x.y
  4. run make rebuild reinstall
  5. go to ~/minimyth2/script/miniarch
  6. run make update-kernel
  7. run ./build-image-for-board.sh
  8. type number to select desired board then press Enter
  9. after some time You should get sd card image for selected board in build dir

Note: running make clean in ~/minimyth2/script/kernel/linux-x.y will delete all your changes. If you want to have them permanently, please do following:

Include your code changes in MiniMyth2 build system

Here is example for linux kernel:

  1. go to ~/minimyth2/script/kernel/linux-x.y
  2. run make clean patch
  3. do desired changes in kernel code in ~/minimyth2/script/kernel/linux-x.y/work/main.d/linux-x.y.z
  4. run make makepatch in ~/minimyth2/script/kernel/linux-x.y
  5. you will get current-changes.patch file in ~/minimyth2/script/kernel/linux-x.y copy this file to ~/minimyth2/script/kernel/linux-x.y/files dir with desired patch_file_name
  6. add PATCHFILES += patch_file_name entry in ~/minimyth2/script/kernel/linux-x.y/Makefile at end of PATCHFILES +=... list
  7. go to ~/minimyth2/script/kernel/linux-x.y and run make makesums-all

Now you can build kernel with your changes by make clean install in ~/minimyth2/script/kernel/linux-x.y and then build MiniArch image by following Example: rebuilding MiniArch image with updated kernel

Note: due nature how patch utility works - please do make makepatch on clean sources. If you do this on sources with build artefacts - then current-changes.patch file will contain also build artefacts. To avoid this, you may do whole Include your code changes in MiniMyth2 build system procedure in some temp dir.

Example:

  1. copy ~/minimyth2/script/kernel/linux-x.y to ~/minimyth2/script/kernel/linux-x.y-temp
  2. go to ~/minimyth2/script/kernel/linux-x.y-temp and do Include your code changes in MiniMyth2 build system procedure
  3. copy current-changes.patch file from ~/minimyth2/script/kernel/linux-x.y-temp to ~/minimyth2/script/kernel/linux-x.y/files dir with desired patch_file_name
  4. add PATCHFILES += patch_file_name entry in ~/minimyth2/script/kernel/linux-x.y/Makefile at end of PATCHFILES +=... list
  5. go to ~/minimyth2/script/kernel/linux-x.y and run make makesums-all

Now you can build kernel with your changes by make clean install in ~/minimyth2/script/kernel/linux-x.y and then build MiniArch image by following Example: rebuilding MiniArch image with updated kernel

Happy developing

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