- add steps-guix/argp-standalone-1.4.1/pass1.sh
- run autoreconf before configure
- build/install with standard flow into /kernel-toolchain
- wire argp-standalone-1.4.1 into steps-guix manifest after gcc
- prepare argp for later kernel-side elfutils dependency
- add gcc-15.2.0 to steps-guix manifest after binutils-2.41
- keep full gcc-15.2.0 pass1 src_prepare cleanup/regeneration flow
- switch configure/build/install to kernel toolchain bootstrap mode:
--without-headers, --enable-multilib, all-gcc, all-target-libgcc
- install into /kernel-toolchain and prioritize /kernel-toolchain/bin in PATH
- add missing gcc distfiles entry for SARIF spec
- include decDPD helper files used during src_prepare
- add --stage0-image in rootfs.py for qemu to boot an existing kernel-bootstrap image
- when --stage0-image is combined with --build-guix-also, update BUILD_GUIX_ALSO in image config and sync /steps-guix into the image
- require stage0 /init to contain guix handoff marker instead of patching /init implicitly
- add run_steps_guix_if_requested() to make_bootable-generated /init so rebooted stage0 images can enter steps-guix directly
- run /steps-guix/0.sh with bash in after.sh
- make script-generator start mode convention-based: /steps stays kaem-first, alternate roots (e.g. /steps-guix) start in bash
- remove redundant explicit /steps config-root argument from seed/preseeded/reconfigure script-generator calls
