Building v1.10.0 from source fails with Clang 18 + libstdc++ 13 (native_calc_plan.cpp:231) #779

Building PineForge Engine v1.10.0 from source with Clang 18 and libstdc++ 13 fails on Linux (verified on arm64).

Compilers: Clang 18.1.3 (clang++-18) with the GCC 13 libstdc++ headers, CMake, Linux arm64 (Ubuntu 24.04).

Build command (the README's):

CC=clang-18 CXX=clang++-18 cmake -B build -S . -DCMAKE_BUILD_TYPE=Release
cmake --build build -j

Error, for both the pineforge and pineforge_kernel targets:

src/native_calc_plan.cpp:231:17: error: no matching member function for call to 'emplace'
    calc_group_.emplace();

The libstdc++ std::optional<pineforge::NativeExecutionConsumer::CalcGroup>::emplace overload is not viable because std::is_constructible_v<pineforge::NativeExecutionConsumer::CalcGroup> is not satisfied under Clang.

Not affected: GCC builds (GCC 11 or later, the compiler the CI uses) and the published prebuilt binaries.

Workaround: build with GCC (libstdc++ from GCC 11 or later, as the README lists), or use the prebuilt binaries.

The fix will ship in the next release.

🤖 Generated with Claude Code