Try to run CI on windows

.github/workflows/tests.yml

@@ -15,6 +15,7 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: macos-11
+          - os: windows-2019
     steps:
       - uses: actions/checkout@v3
 

mops/CMakeLists.txt

@@ -139,8 +139,14 @@ check_cxx_compiler_flag("-Wunknown-pragmas" COMPILER_SUPPORTS_WPRAGMAS)
 if (MOPS_OPENMP)
     find_package(OpenMP)
     if(OpenMP_CXX_FOUND)
-        message(STATUS "OpenMP is enabled")
-        target_link_libraries(mops PUBLIC OpenMP::OpenMP_CXX)
+        if (MSVC)
+            # MSVC only supports an old version of OpenMP, let's disable it
+            # until we change the code to work with this version
+            message(STATUS "OpenMP was found, but is disabled on MSVC")
+        else()
+            message(STATUS "OpenMP is enabled")
+            target_link_libraries(mops PUBLIC OpenMP::OpenMP_CXX)
+        endif()
     else()
         message(WARNING "Could not find OpenMP")
         if(COMPILER_SUPPORTS_WPRAGMAS)

pyproject.toml

@@ -43,15 +43,15 @@ repository = "https://github.com/lab-cosmo/mops"
 [build-system]
 requires = [
     "setuptools >=68",
-    "cmake <3.28",  # this should be changed once cmake 3.28.1 is on PyPI
+    "cmake",
 ]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools]
 zip-safe = false
 
 [tool.setuptools.packages.find]
-where = ["python/mops/src/"]
+where = ["python/mops/src"]
 
 ### ======================================================================== ###
 [tool.pytest.ini_options]