Migrate build system to CMake

See #5895 for details.

This commit does not include CI or documentation changes.

pyosys/CMakeLists.txt

@@ -0,0 +1,29 @@
+add_custom_command(
+	DEPENDS
+		${CMAKE_CURRENT_SOURCE_DIR}/generator.py
+		${CMAKE_CURRENT_SOURCE_DIR}/wrappers_tpl.cc
+	OUTPUT
+		${CMAKE_CURRENT_BINARY_DIR}/wrappers.cc
+		${CMAKE_CURRENT_BINARY_DIR}/wrappers.inc.cc
+	DEPFILE
+		${CMAKE_CURRENT_BINARY_DIR}/wrappers.cc.d
+	COMMAND
+		${CMAKE_COMMAND} -E env
+			CCACHE=${CMAKE_CXX_COMPILER_LAUNCHER}
+			CXX=${CMAKE_CXX_COMPILER}
+			CXX_STD=c++${CMAKE_CXX_STANDARD}
+		-- ${PyosysEnv_PYTHON}
+			${CMAKE_CURRENT_SOURCE_DIR}/generator.py
+			${CMAKE_CURRENT_BINARY_DIR}/wrappers.cc
+			--build-dir ${CMAKE_BINARY_DIR}
+	VERBATIM
+	COMMENT "Generating Python wrappers"
+)
+yosys_core(pyosys
+	wrappers.cc
+	INCLUDE_DIRS
+		${pybind11_INCLUDE_DIR}
+	LIBRARIES
+		$<${YOSYS_ENABLE_PYTHON}:Python3::Python>
+	ESSENTIAL
+)