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2081918cea
The "Python bindings (Pyodide)" CI job fails at CMake configure time because Emscripten's cross-compiler cannot pass the `std::atomic` link tests in `check_link_atomic.cmake`, resulting in a fatal error even though Pyodide builds are single-threaded and never need `libatomic`. ## Change - **`cmake/check_link_atomic.cmake`**: guard the entire atomic check behind `if (NOT (EMSCRIPTEN OR Z3_SINGLE_THREADED))`. Emscripten sets `EMSCRIPTEN` automatically via `emcmake`; Pyodide builds also pass `-DZ3_SINGLE_THREADED=TRUE`, so either condition is sufficient to bypass the check safely. --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
29 lines
871 B
CMake
29 lines
871 B
CMake
if (EMSCRIPTEN OR Z3_SINGLE_THREADED)
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# Emscripten (Pyodide/WASM) and single-threaded builds do not use
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# libatomic; skip the check to avoid a spurious configure failure.
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message(STATUS "Skipping std::atomic link check (EMSCRIPTEN or Z3_SINGLE_THREADED)")
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else()
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set(ATOMIC_TEST_SOURCE "
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#include <atomic>
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std::atomic<int> x;
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std::atomic<short> y;
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std::atomic<char> z;
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std::atomic<long long> w;
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int main() {
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++z;
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++y;
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++w;
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return ++x;
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}")
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CHECK_CXX_SOURCE_COMPILES("${ATOMIC_TEST_SOURCE}" BUILTIN_ATOMIC)
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if (NOT BUILTIN_ATOMIC)
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set(CMAKE_REQUIRED_LIBRARIES atomic)
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CHECK_CXX_SOURCE_COMPILES("${ATOMIC_TEST_SOURCE}" ATOMICS_REQUIRE_LIBATOMIC)
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unset(CMAKE_REQUIRED_LIBRARIES)
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if (ATOMICS_REQUIRE_LIBATOMIC)
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list(APPEND Z3_DEPENDENT_LIBS atomic)
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else()
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message(FATAL_ERROR "Host compiler must support std::atomic!")
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endif()
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endif()
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endif()
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