Migrate build system to CMake

See #5895 for details.

This commit does not include CI or documentation changes.

tests/unit/CMakeLists.txt

@@ -0,0 +1,25 @@
+include(CTest)
+include(GoogleTest)
+
+function(yosys_gtest arg_TARGET)
+	cmake_parse_arguments(PARSE_ARGV 1 arg "" "" "COMPONENTS")
+	set(arg_SOURCES ${arg_UNPARSED_ARGUMENTS})
+
+	set(target "gtest-${arg_TARGET}")
+	add_executable(${target} ${arg_SOURCES})
+	target_link_libraries(${target} PRIVATE GTest::gmock_main yosys_common)
+	yosys_expand_components(test_components essentials ${arg_COMPONENTS})
+	yosys_link_components(${target} PRIVATE ${test_components})
+
+	if(NOT CMAKE_CROSSCOMPILING)
+		gtest_discover_tests(${target})
+	endif()
+endfunction()
+
+if (GTest_FOUND)
+	add_subdirectory(kernel)
+	add_subdirectory(opt)
+	add_subdirectory(techmap)
+
+	enable_testing()
+endif()

tests/unit/kernel/CMakeLists.txt

@@ -0,0 +1,14 @@
+yosys_gtest(kernel
+	bitpatternTest.cc
+	cellTypesTest.cc
+	hashTest.cc
+	ioTest.cc
+	logTest.cc
+	modindexTest.cc
+	rtlilHelpers.h
+	rtlilStringTest.cc
+	rtlilTest.cc
+	sigspecExtractTest.cc
+	sigspecRemove2Test.cc
+	threadingTest.cc
+)

tests/unit/opt/CMakeLists.txt

@@ -0,0 +1,5 @@
+yosys_gtest(opt
+	optDffFindComplementaryPatternTest.cc
+	COMPONENTS
+		opt_dff
+)

tests/unit/techmap/CMakeLists.txt

@@ -0,0 +1,5 @@
+yosys_gtest(techmap
+	libparseTest.cc
+	COMPONENTS
+		libparse
+)