Build tools + tests with cmake + add VERSION + parallel install

test/CMakeLists.txt

@@ -0,0 +1,49 @@
+add_library(kissfft_help_library OBJECT
+    pstats.c
+    ../tools/kfc.c
+    ../tools/kiss_fftnd.c
+    ../tools/kiss_fftr.c
+    ../tools/kiss_fftndr.c
+)
+target_link_libraries(kissfft_help_library PRIVATE kissfft::kissfft)
+target_include_directories(kissfft_help_library PRIVATE ../tools)
+
+function(add_kissfft_test_executable NAME)
+    add_kissfft_executable(${NAME} ${ARGN} $<TARGET_OBJECTS:kissfft_help_library>)
+    target_include_directories(${NAME} PRIVATE ../tools)
+    add_test(NAME ${NAME} COMMAND ${NAME})
+    set_tests_properties(${NAME} PROPERTIES TIMEOUT 10)
+endfunction()
+
+set(KISSFFT_TEST_NUMFFTS 10000)
+
+add_kissfft_test_executable(bm_kiss benchkiss.c)
+# add_test(NAME benchmar COMMAND ${NAME})
+# set_tests_properties(${NAME} PROPERTIES TIMEOUT 10)
+
+include(FindPkgConfig)
+if(KISSFFT_FLOAT)
+    set(fftw3_pkg fftw3f)
+else()
+    set(fftw3_pkg fftw3)
+endif()
+pkg_check_modules(fftw3 REQUIRED IMPORTED_TARGET ${fftw3_pkg})
+add_kissfft_test_executable(bm_fftw benchfftw.c)
+target_link_libraries(bm_fftw PRIVATE PkgConfig::fftw3)
+
+add_kissfft_test_executable(st twotonetest.c)
+
+add_kissfft_test_executable(tkfc twotonetest.c)
+target_compile_definitions(tkfc PRIVATE KFC_TEST)
+
+add_kissfft_test_executable(ffr twotonetest.c)
+add_kissfft_test_executable(tr test_real.c)
+
+add_kissfft_test_executable(testcpp testcpp.cc)
+
+find_package(PythonInterp REQUIRED)
+add_test(NAME testkiss.py COMMAND "${PYTHON_EXECUTABLE}" "${CMAKE_CURRENT_SOURCE_DIR}/testkiss.py")
+set_tests_properties(testkiss.py PROPERTIES
+    TIMEOUT 20
+    ENVIRONMENT "DATATYPE=${KISSFFT_DATATYPE}"
+    WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")