Install OpenMP on macos to try to resolve macos13 problem, install ninja on Windows to try to fix problem with PyTorch not finding compiler, and change Windows compiler options to be separate instead of a single string to try to resolve problem with it not understanding the compiler options

Author: ar4

CMakeLists.txt

@@ -99,7 +99,7 @@ if(CMAKE_BUILD_TYPE MATCHES Release)
         set(C_RELEASE_FLAGS "-Ofast")
         set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Ofast")
     elseif(CMAKE_C_COMPILER_ID MATCHES "MSVC")
-        set(C_RELEASE_FLAGS "/O2 /fp:fast")
+        set(C_RELEASE_FLAGS "/O2" "/fp:fast")
     endif()
 endif()
 # --- End Compiler Feature Detection and Flags ---

pyproject.toml

@@ -51,9 +51,11 @@ repair-wheel-command = "auditwheel repair -w {dest_dir} {wheel} --exclude libcud
 before-test = "pip install torch --index-url https://download.pytorch.org/whl/cpu"
 
 [tool.cibuildwheel.windows]
+before-test = "pip install ninja"
 test-command = "pytest tests/test_scalar.py"
 
 [tool.cibuildwheel.macos]
+before-test = "brew install libomp"
 test-command = "pytest tests/test_scalar.py"
 
 [tool.scikit-build.sdist]