fix(gnu.org/gcc/v8): make usable as a build compiler + add aarch64#13733
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gcc 8 is needed from source to build legacy C++ that modern gcc rejects (e.g. MySQL 5.7, pantry#13062). Two blockers today: 1. `provides:` was commented out, so a downstream recipe that build-depends on gnu.org/gcc/v8 gets no `gcc`/`g++` on PATH and silently falls back to the default gcc — which then fails on the legacy sources. Publish the toolchain binaries so it can actually be selected as the build compiler. 2. Only `linux` (implicitly x86-64) was listed; add linux/aarch64 so arm64 consumers can use it too. Also switch the ar/nm/ranlib shims to direct relative symlinks into the binutils bottle (the previous pkgx-wrapper form broke under bazel/strict action envs), and tidy the version test. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Make
gnu.org/gcc/v8usable as a build-time compiler for downstream recipes, and addlinux/aarch64.Why
gcc 8 is required from source to build legacy C++ that modern gcc (14/15/16) rejects — MySQL 5.7 being the immediate consumer (#13062). Two problems block that today:
provides:is commented out. A recipe thatbuild.dependencies: gnu.org/gcc/v8therefore gets nogcc/g++onPATHand silently falls back to the default gcc, which then fails on the old sources. This publishes the toolchain binaries so v8 can actually be selected as the build compiler. (The prior comment — "not wise to publish, users invoke explicitly" — is about end-user PATH; but a build-dep genuinely needs the binaries exposed.)linux(x86-64 in practice) was listed; addlinux/aarch64.Also switches the
ar/nm/ranlibshims to direct relative symlinks into the binutils bottle (the pkgx-wrapper form broke under bazel/strict action envs) and tidies the version test.Notes
Extracted from #13062 so the compiler change can land and be reviewed independently; #13062 will then just build-depend on it.
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