The Redox target port applier claimed validation on 16.1.0 but its
idempotency probe used each block's longest line, which for three blocks
is generic upstream boilerplate. Against a pristine 16.1.0 tree that
silently skipped the libgcc target arms and BOTH crossconfig.m4 arms
(libgcc/config.host and crossconfig.m4 contain zero redox references, yet
the applier reported 'already present'), producing a half-ported tree --
the exact failure the script documents itself as preventing. Probe on the
longest redox-bearing line instead, matched whole.
Two port requirements the original extraction missed, both fatal:
- gcc/config/redox.opt.urls. GCC 16 requires a .opt.urls companion for
every .opt; s-options fails without it. Contents match what
regenerate-opt-urls.py emits for these two options, cross-checked
against the six upstream .opt.urls declaring the same pthread/rdynamic.
- libtool has no redox host. Upstream Redox gets shared libraries from
recipes/dev/libtool (a Redox-patched libtool 2.5.4-redox-9510) via
libtoolize during autoreconf, not from GCC's bundled libtool.m4. That
route does not apply to GCC 16, which bundles 2.2.7-era macros plus its
own ltgcc.m4. Without redox arms _LT_SYS_DYNAMIC_LINKER leaves
dynamic_linker=no, libstdc++ builds static-only, and the desktop stack
cannot link -- libQt6Core.so and every KF6 library carry DT_NEEDED
libstdc++.so.6. apply-libtool-redox.py registers the four arms that
matter, verbatim from the Redox libtool macros already in prefix/.
Result: x86_64-unknown-redox-gcc 16.1.0 with libstdc++.so.6.0.35 (SONAME
libstdc++.so.6, NEEDED libc.so.6 + libgcc_s.so.1 -- identical to the
13.2.0 library it replaces, exports a superset up to GLIBCXX_3.4.35).
std::ranges::to now compiles for the Redox target; GCC 13.2.0 fails the
same test, which is what blocked kwin's 16 affected files.
install-gcc16-toolchain.sh installs into all three locations a recipe can
resolve a compiler from -- including ~/.redoxer, which src/cook/script.rs
puts highest on PATH -- and is reversible with --restore. Its cstdlib
strtold patch is guarded; the mk/prefix.mk sed is not, and had applied
that block 17 times to the GCC 13 toolchain.
vasilito
f2b6c1e0ed