Repointed [source] from the gcc13 recipe to the Redox-ported GCC 16 tree
(local/recipes/dev/gcc16/source, upstream 16.1.0 + gcc-redox-port), which
is what produced the working cross toolchain in prefix/.
Building GCC 13 with the GCC 16 cross compiler was not a supported
configuration and each fix only revealed the next incompatibility -- a
C++11 pin for libcody, GCC 13's cpuid.h shadowing the toolchain's after
GCC 15/16 removed the withdrawn AVX512PF/ER/4VNNIW/4FMAPS and PREFETCHWT1
macros, and finally an ICE in gimple_build_eh_must_not_throw compiling
libsupc++. All three are gone on GCC 16: ICE 0, char8_t 0, cpuid 0.
Also fixed here:
- The stale same_as symlink (source -> recipes/dev/gcc13/source) survived
the recipe edit and kept feeding GCC 13 sources to the build. Removed.
- gcc13/gcc13.cxx dropped from dependencies: they build the compiler this
recipe no longer uses. The cross compiler comes from the prefix on PATH.
- Exempted from the tree-wide -std=gnu17 pin. That pin exists for the
C17-era recipes, but GCC 16's own sources are C23 and use `bool` as a
keyword: gcc/config/i386/i386.h:1722: unknown type name 'bool'.
- [package].version set explicitly -- same_as used to supply it, and a
path source leaves the cookbook nothing to infer from.
- Version-globbed the hardcoded 13.2.0 libgcc copy paths.
BLOCKED on a genuine relibc gap. libstdc++'s <cfenv> does
using ::fenv_t; using ::fexcept_t;
but relibc's fenv.h is a 3-line stub defining neither, so
libstdc++-v3/include/fenv.h fails. fenv.h is a C99/POSIX header owed
fenv_t, fexcept_t, the FE_* macros and the fe* functions. Implementing it
in the relibc fork is the fix -- per LOCAL-FORK-SUPREMACY-POLICY.md Rule 2
the fork must be complete -- and is real work, not a flag.
vasilito
4446e287ae