Two fixes for the native tblgen sub-build failing on <shared_mutex>:
- LLVM_OPTIMIZED_TABLEGEN=Off: this recipe already provides a host-runnable,
version-matched llvm-/clang-tblgen (redoxer toolchain, LLVM 21.1.2) via
*_TABLEGEN_EXE. OPTIMIZED_TABLEGEN=On ignored those and forced a redundant
native sub-build (CROSS_TOOLCHAIN_FLAGS_NATIVE) that failed. Off => LLVM uses
the provided tblgen and skips the native build. (llvm21 provides no tblgen,
so it keeps On and builds its own — different case, left as-is.)
- CMAKE_CXX_FLAGS --std=gnu++11 -> gnu++17: LLVM 21 requires C++17; the stale
gnu++11 could win the flag-order race in any sub-build and break the headers.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
vasilito
5d426d89a7