env.sh now appends /bin internally, so callers pass the install root
(e.g. build/install) consistently, both when using the default path
and when specifying it explicitly.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
All hardcoded versions are now defined once in versions.sh and sourced
by build-toolchain.sh, download_prerequisites.sh, and build-libraries.sh,
eliminating the need to update multiple files when changing a version.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
