[WIP] Cython language

src/cython_cmake/cmake/CMakeCythonCompiler.cmake.in

@@ -0,0 +1,25 @@
+message(WARNING "Entering CMakeCythonCompiler.cmake")
+
+#set(CMAKE_Cython_COMPILER "@CMAKE_Cython_COMPILER@")
+#set(CMAKE_Cython_COMPILER_ID "@CMAKE_Cython_COMPILER_ID@")
+#set(CMAKE_Cython_COMPILER_VERSION "@CMAKE_Cython_COMPILER_VERSION@")
+
+set(CMAKE_Cython_COMPILER "@CYTHON_EXE@")
+set(CMAKE_Cython_COMPILER_ID "dummy2")
+set(CMAKE_Cython_COMPILER_VERSION "dummy3")
+
+set(CMAKE_Cython_COMPILER_LOADED 1)
+#set(CMAKE_Cython_COMPILER_WORKS "@CMAKE_Cython_COMPILER_WORKS@")
+set(CMAKE_Cython_COMPILER_WORKS 1 CACHE INTERNAL "")
+
+#set(CMAKE_Cython_COMPILER_ID_RUN "@CMAKE_Cython_COMPILER_ID_RUN@")
+set(CMAKE_Cython_COMPILER_ID_RUN "dummy4")
+## Not sure how to ensure the correct order of enable_language so that this works
+#set(CMAKE_INCLUDE_FLAG_Cython "${CMAKE_INCLUDE_FLAG_C}")
+set(CMAKE_INCLUDE_FLAG_Cython "-I")
+## Approach 1
+#set(CMAKE_Cython_OUTPUT_EXTENSION ".c")
+## Approach 2
+set(CMAKE_Cython_OUTPUT_EXTENSION ".o")
+set(CMAKE_Cython_IGNORE_EXTENSIONS "c;o;O;obj;OBJ")
+set(CMAKE_Cython_SOURCE_FILE_EXTENSIONS "pyx;py")

src/cython_cmake/cmake/CMakeCythonInformation.cmake

@@ -0,0 +1,107 @@
+message(WARNING "Entering CMakeCythonInformation.cmake")
+
+#set(CMAKE_Cython_CREATE_SHARED_LIBRARY)
+#set(CMAKE_Cython_CREATE_SHARED_MODULE)
+#set(CMAKE_Cython_CREATE_STATIC_LIBRARY)
+#set(CMAKE_Cython_COMPILE_OBJECT)
+#set(CMAKE_Cython_LINK_EXECUTABLE)
+
+if(NOT CMAKE_Cython_COMPILE_OPTIONS_PIC)
+    set(CMAKE_Cython_COMPILE_OPTIONS_PIC ${CMAKE_C_COMPILE_OPTIONS_PIC})
+endif()
+
+if(NOT CMAKE_Cython_COMPILE_OPTIONS_PIE)
+    set(CMAKE_Cython_COMPILE_OPTIONS_PIE ${CMAKE_C_COMPILE_OPTIONS_PIE})
+endif()
+if(NOT CMAKE_Cython_LINK_OPTIONS_PIE)
+    set(CMAKE_Cython_LINK_OPTIONS_PIE ${CMAKE_C_LINK_OPTIONS_PIE})
+endif()
+if(NOT CMAKE_Cython_LINK_OPTIONS_NO_PIE)
+    set(CMAKE_Cython_LINK_OPTIONS_NO_PIE ${CMAKE_C_LINK_OPTIONS_NO_PIE})
+endif()
+
+if(NOT CMAKE_Cython_COMPILE_OPTIONS_DLL)
+    set(CMAKE_Cython_COMPILE_OPTIONS_DLL ${CMAKE_C_COMPILE_OPTIONS_DLL})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_CREATE_Cython_FLAGS)
+    set(CMAKE_SHARED_LIBRARY_CREATE_Cython_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_Cython_FLAGS)
+    set(CMAKE_SHARED_LIBRARY_Cython_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_Cython_FLAGS)
+    set(CMAKE_SHARED_LIBRARY_LINK_Cython_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_RUNTIME_Cython_FLAG)
+    set(CMAKE_SHARED_LIBRARY_RUNTIME_Cython_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_RUNTIME_Cython_FLAG_SEP)
+    set(CMAKE_SHARED_LIBRARY_RUNTIME_Cython_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_RPATH_LINK_Cython_FLAG)
+    set(CMAKE_SHARED_LIBRARY_RPATH_LINK_Cython_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG})
+endif()
+
+if(NOT DEFINED CMAKE_EXE_EXPORTS_Cython_FLAG)
+    set(CMAKE_EXE_EXPORTS_Cython_FLAG ${CMAKE_EXE_EXPORTS_C_FLAG})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_SONAME_Cython_FLAG)
+    set(CMAKE_SHARED_LIBRARY_SONAME_Cython_FLAG ${CMAKE_SHARED_LIBRARY_SONAME_C_FLAG})
+endif()
+
+
+if(NOT DEFINED CMAKE_SHARED_MODULE_CREATE_Cython_FLAGS)
+    set(CMAKE_SHARED_MODULE_CREATE_Cython_FLAGS ${CMAKE_SHARED_MODULE_CREATE_C_FLAGS})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_MODULE_Cython_FLAGS)
+    set(CMAKE_SHARED_MODULE_Cython_FLAGS ${CMAKE_SHARED_MODULE_C_FLAGS})
+endif()
+
+if(NOT DEFINED CMAKE_EXECUTABLE_RUNTIME_Cython_FLAG)
+    set(CMAKE_EXECUTABLE_RUNTIME_Cython_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_Cython_FLAG})
+endif()
+
+if(NOT DEFINED CMAKE_EXECUTABLE_RUNTIME_Cython_FLAG_SEP)
+    set(CMAKE_EXECUTABLE_RUNTIME_Cython_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_Cython_FLAG_SEP})
+endif()
+
+if(NOT DEFINED CMAKE_EXECUTABLE_RPATH_LINK_Cython_FLAG)
+    set(CMAKE_EXECUTABLE_RPATH_LINK_Cython_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_Cython_FLAG})
+endif()
+
+if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_Cython_WITH_RUNTIME_PATH)
+    set(CMAKE_SHARED_LIBRARY_LINK_Cython_WITH_RUNTIME_PATH ${CMAKE_SHARED_LIBRARY_LINK_C_WITH_RUNTIME_PATH})
+endif()
+
+if(NOT CMAKE_INCLUDE_FLAG_Cython)
+    set(CMAKE_INCLUDE_FLAG_Cython ${CMAKE_INCLUDE_FLAG_C})
+endif()
+
+if(NOT CMAKE_Cython_COMPILE_OBJECT)
+    ## Typical definition
+#    set(CMAKE_Cython_COMPILE_OBJECT
+#            "<CMAKE_Cython_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -c <SOURCE> -o <OBJECT>")
+    ## Approach 1
+#    set(CMAKE_Cython_COMPILE_OBJECT
+#            "<CMAKE_Cython_COMPILER> <INCLUDES> <FLAGS> -o <OBJECT> <SOURCE>")
+    ## Approach 2
+    string(REPLACE "<SOURCE>" "<OBJECT>.c" CMAKE_C_COMPILE_OBJECT_replaced "${CMAKE_C_COMPILE_OBJECT}")
+    set(CMAKE_Cython_COMPILE_OBJECT
+            "<CMAKE_Cython_COMPILER> -o <OBJECT>.c <SOURCE>"
+            "${CMAKE_C_COMPILE_OBJECT_replaced}"
+    )
+endif()
+
+set(CMAKE_Cython_CREATE_SHARED_LIBRARY ${CMAKE_C_CREATE_SHARED_LIBRARY})
+set(CMAKE_Cython_CREATE_SHARED_MODULE ${CMAKE_C_CREATE_SHARED_MODULE})
+set(CMAKE_Cython_LINK_EXECUTABLE ${CMAKE_C_LINK_EXECUTABLE})
+
+set(CMAKE_Cython_INFORMATION_LOADED 1)

src/cython_cmake/cmake/CMakeDetermineCythonCompiler.cmake

@@ -0,0 +1,42 @@
+message(WARNING "Entering CMakeDetermineCythonCompiler.cmake")
+
+find_package(Python 3.8 REQUIRED Interpreter Development.Module)
+find_program(CYTHON_EXE
+        cython
+        REQUIRED
+)
+
+#include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake)
+##include(Platform/${CMAKE_SYSTEM_NAME}-Determine-Cython OPTIONAL)
+##include(Platform/${CMAKE_SYSTEM_NAME}-Cython OPTIONAL)
+#if(NOT CMAKE_Cython_COMPILER_NAMES)
+#  set(CMAKE_Cython_COMPILER_NAMES cython)
+#endif()
+
+## Build a small source file to identify the compiler.
+#if(NOT CMAKE_Cython_COMPILER_ID_RUN)
+#  set(CMAKE_Cython_COMPILER_ID_RUN 1)
+#
+#  # Try to identify the compiler.
+#  set(CMAKE_Cython_COMPILER_ID)
+#  include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
+#  CMAKE_DETERMINE_COMPILER_ID(Cython CYTHONFLAGS CMakeCythonCompilerId.pyx)
+#
+#  execute_process(COMMAND "${CMAKE_Cython_COMPILER}" "/help /preferreduilang:en-US" OUTPUT_VARIABLE output)
+#  string(REPLACE "\n" ";" output "${output}")
+#  foreach(line ${output})
+#    string(TOUPPER ${line} line)
+#    string(REGEX REPLACE "^.*COMPILER.*VERSION[^\\.0-9]*([\\.0-9]+).*$" "\\1" version "${line}")
+#    if(version AND NOT "x${line}" STREQUAL "x${version}")
+#      set(CMAKE_Cython_COMPILER_VERSION ${version})
+#      break()
+#    endif()
+#  endforeach()
+#  message(STATUS "The Cython compiler version is ${CMAKE_Cython_COMPILER_VERSION}")
+#endif()
+
+# configure variables set in this file for fast reload later on
+configure_file(${CMAKE_CURRENT_LIST_DIR}/CMakeCythonCompiler.cmake.in
+  ${CMAKE_PLATFORM_INFO_DIR}/CMakeCythonCompiler.cmake
+  @ONLY
+  )

src/cython_cmake/cmake/CMakeTestCythonCompiler.cmake

@@ -0,0 +1,27 @@
+message(WARNING "Entering CMakeTestCythonCompiler.cmake")
+
+if(CMAKE_Cython_COMPILER_FORCED)
+    # The compiler configuration was forced by the user.
+    # Assume the user has configured all compiler information.
+    set(CMAKE_Cython_COMPILER_WORKS TRUE)
+    return()
+endif()
+
+include(CMakeTestCompilerCommon)
+
+unset(CMAKE_Cython_COMPILER_WORKS CACHE)
+
+if(NOT CMAKE_Cython_COMPILER_WORKS)
+    message(WARNING "Running tests: CMakeTestCythonCompiler.cmake")
+    PrintTestCompilerStatus(Cython)
+    unset(CMAKE_Cython_COMPILER_WORKS)
+    try_compile(CMAKE_Cython_COMPILER_WORKS
+            SOURCES ${CMAKE_CURRENT_LIST_DIR}/TestCythonCompiler.pyx
+            OUTPUT_VARIABLE __CMAKE_Cython_COMPILER_OUTPUT
+    )
+    message(WARNING "__CMAKE_Cython_COMPILER_OUTPUT=${__CMAKE_Cython_COMPILER_OUTPUT}")
+    unset(__TestCompiler_testCythonCompilerSource)
+    set(CMAKE_Cython_COMPILER_WORKS ${CMAKE_Cython_COMPILER_WORKS})
+    unset(CMAKE_Cython_COMPILER_WORKS CACHE)
+    set(Cython_TEST_WAS_RUN 1)
+endif()

src/cython_cmake/cmake/TestCythonCompiler.pyx

@@ -0,0 +1,4 @@
+# cython: language_level=3
+
+def square(float x):
+    return x * x

tests/packages/simple_language/.gitignore

@@ -0,0 +1,176 @@
+# Created by https://www.toptal.com/developers/gitignore/api/python
+# Edit at https://www.toptal.com/developers/gitignore?templates=python
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+# End of https://www.toptal.com/developers/gitignore/api/python