Error building on cmake 4.1.2 (outdated zstd used by ccache) #1616
Description
Error:
CMake Error at /Users/m1/pyodide_env/pyodide/emsdk/emsdk/ccache/git-emscripten_64bit/build_emscripten_64/zstd-1.4.8/build/cmake/CMakeLists.txt:10 (cmake_minimum_required):
Compatibility with CMake < 3.5 has been removed from CMake.
Update the VERSION argument <min> value. Or, use the <min>...<max> syntax
to tell CMake that the project requires at least <min> but has been updated
to work with policies introduced by <max> or earlier.
Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
Apparently because buid is using https://github.com/juj/ccache which is still relying on zstd 1.4.8 and downloading it from the internet.
https://github.com/juj/ccache/blob/c4284c78e9ff286ee5208f449af4c2aaba062d37/cmake/Findzstd.cmake#L9
zstd 1.4.8:
https://github.com/facebook/zstd/blob/v1.4.8/build/cmake/CMakeLists.txt#L10
The first zstd version that has cmake 3.5+ is 1.5.6:
https://github.com/facebook/zstd/blob/v1.5.6/build/cmake/CMakeLists.txt#L10