Prepare builder.py to kernel-mode builds - #23
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raiden00pl
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Sep 1, 2026
raiden00pl
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- builder.py: register app_bindir and exec_cwd for kernel-mode builds
- builder.py: add application image support for kernel-mode flashing
- builder.py: reconfigure after applying Kconfig overrides
Kernel-mode CMake builds install applications to <build>/bin. On qemu arm/riscv the target mounts them over a semihosting hostfs relative to the spawned process working directory. When the generated .config selects CONFIG_BUILD_KERNEL=y, register app_bindir=<build>/bin and exec_cwd=<build>, keeping values set in YAML. Signed-off-by: raiden00pl <raiden00@railab.me> Assisted-by: Claude Code
Real hardware has no hostfs, so kernel-mode applications must be shipped as a filesystem image. Add the per-core apps_image option, which generates a ROMFS image from app_bindir with genromfs after the build, and the $APPS_BINDIR and $APPS_IMG flash command placeholders. Signed-off-by: raiden00pl <raiden00@railab.me> Assisted-by: Claude Code
CMake registers application targets at configure time from .config, but kv overrides are applied after configuring, so an override enabling a new application changed .config without ever creating its build target: code-level options took effect through the .config -> config.h rule while the application never appeared in the image. Overrides can also unlock suboptions (e.g. *_PROGNAME) whose missing defaults make cmake drop the application silently. Run olddefconfig and configure again after applying overrides. Signed-off-by: raiden00pl <raiden00@railab.me> Assisted-by: Claude Code
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