include(ExternalProject) include(CheckCXXCompilerFlag) #============================================================================== # Build Google Benchmark for libc++ #============================================================================== set(BENCHMARK_LIBCXX_COMPILE_FLAGS -Wno-unused-command-line-argument -nostdinc++ -isystem ${LIBCXX_SOURCE_DIR}/include -L${LIBCXX_LIBRARY_DIR} -Wl,-rpath,${LIBCXX_LIBRARY_DIR} ${SANITIZER_FLAGS} ) if (DEFINED LIBCXX_CXX_ABI_LIBRARY_PATH) list(APPEND BENCHMARK_LIBCXX_COMPILE_FLAGS -L${LIBCXX_CXX_ABI_LIBRARY_PATH} -Wl,-rpath,${LIBCXX_CXX_ABI_LIBRARY_PATH}) endif() if (LIBCXX_NEEDS_SITE_CONFIG) list(APPEND BENCHMARK_LIBCXX_COMPILE_FLAGS -include "${LIBCXX_BINARY_DIR}/__config_site") endif() split_list(BENCHMARK_LIBCXX_COMPILE_FLAGS) ExternalProject_Add(google-benchmark-libcxx EXCLUDE_FROM_ALL ON DEPENDS cxx cxx-headers PREFIX benchmark-libcxx SOURCE_DIR ${LIBCXX_SOURCE_DIR}/utils/google-benchmark INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx CMAKE_CACHE_ARGS -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER} -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER} -DCMAKE_BUILD_TYPE:STRING=RELEASE -DCMAKE_INSTALL_PREFIX:PATH= -DCMAKE_CXX_FLAGS:STRING=${BENCHMARK_LIBCXX_COMPILE_FLAGS} -DBENCHMARK_USE_LIBCXX:BOOL=ON -DBENCHMARK_ENABLE_TESTING:BOOL=OFF) #============================================================================== # Build Google Benchmark for the native stdlib #============================================================================== set(BENCHMARK_NATIVE_TARGET_FLAGS) if (LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN) set(BENCHMARK_NATIVE_TARGET_FLAGS -gcc-toolchain ${LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN}) endif() split_list(BENCHMARK_NATIVE_TARGET_FLAGS) if (LIBCXX_BENCHMARK_NATIVE_STDLIB) ExternalProject_Add(google-benchmark-native EXCLUDE_FROM_ALL ON PREFIX benchmark-native SOURCE_DIR ${LIBCXX_SOURCE_DIR}/utils/google-benchmark INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native CMAKE_CACHE_ARGS -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER} -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER} -DCMAKE_CXX_FLAGS:STRING=${BENCHMARK_NATIVE_TARGET_FLAGS} -DCMAKE_BUILD_TYPE:STRING=RELEASE -DCMAKE_INSTALL_PREFIX:PATH= -DBENCHMARK_ENABLE_TESTING:BOOL=OFF) endif() #============================================================================== # Benchmark tests configuration #============================================================================== add_custom_target(cxx-benchmarks) set(BENCHMARK_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}) set(BENCHMARK_LIBCXX_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx) set(BENCHMARK_NATIVE_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native) check_flag_supported("-std=c++17") mangle_name("LIBCXX_SUPPORTS_STD_EQ_c++17_FLAG" BENCHMARK_SUPPORTS_STD_CXX17_FLAG) if (${BENCHMARK_SUPPORTS_STD_CXX17_FLAG}) set(BENCHMARK_DIALECT_FLAG "-std=c++17") else() # If the compiler doesn't support -std=c++17, attempt to fall back to -std=c++1z while still # requiring C++17 language features. set(BENCHMARK_DIALECT_FLAG "-std=c++1z") endif() set(BENCHMARK_TEST_COMPILE_FLAGS ${BENCHMARK_DIALECT_FLAG} -O2 -I${BENCHMARK_LIBCXX_INSTALL}/include -I${LIBCXX_SOURCE_DIR}/test/support ) set(BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS -nostdinc++ -isystem ${LIBCXX_SOURCE_DIR}/include ${BENCHMARK_TEST_COMPILE_FLAGS} ${SANITIZER_FLAGS} -Wno-user-defined-literals ) if (LIBCXX_NEEDS_SITE_CONFIG) list(APPEND BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS -include "${LIBCXX_BINARY_DIR}/__config_site") endif() set(BENCHMARK_TEST_LIBCXX_LINK_FLAGS -nodefaultlibs -L${BENCHMARK_LIBCXX_INSTALL}/lib/ ${SANITIZER_FLAGS} ) set(BENCHMARK_TEST_NATIVE_COMPILE_FLAGS ${BENCHMARK_NATIVE_TARGET_FLAGS} ${BENCHMARK_TEST_COMPILE_FLAGS} ) set(BENCHMARK_TEST_NATIVE_LINK_FLAGS ${BENCHMARK_NATIVE_TARGET_FLAGS} -L${BENCHMARK_NATIVE_INSTALL}/lib ) split_list(BENCHMARK_TEST_COMPILE_FLAGS) split_list(BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS) split_list(BENCHMARK_TEST_LIBCXX_LINK_FLAGS) split_list(BENCHMARK_TEST_NATIVE_COMPILE_FLAGS) split_list(BENCHMARK_TEST_NATIVE_LINK_FLAGS) if (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++") find_library(LIBSTDCXX_FILESYSTEM_TEST stdc++fs PATHS ${LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN} PATH_SUFFIXES lib lib64 DOC "The libstdc++ filesystem library used by the benchmarks" ) if (NOT "${LIBSTDCXX_FILESYSTEM_TEST}" STREQUAL "LIBSTDCXX_FILESYSTEM_TEST-NOTFOUND") set(LIBSTDCXX_FILESYSTEM_LIB "stdc++fs") endif() endif() set(libcxx_benchmark_targets) function(add_benchmark_test name source_file) set(libcxx_target ${name}_libcxx) list(APPEND libcxx_benchmark_targets ${libcxx_target}) add_executable(${libcxx_target} EXCLUDE_FROM_ALL ${source_file}) add_dependencies(${libcxx_target} cxx cxx-headers google-benchmark-libcxx) add_dependencies(cxx-benchmarks ${libcxx_target}) if (LIBCXX_ENABLE_SHARED) target_link_libraries(${libcxx_target} cxx_shared) else() target_link_libraries(${libcxx_target} cxx_static) endif() if (TARGET cxx_experimental) target_link_libraries(${libcxx_target} cxx_experimental) endif() if (TARGET cxx_filesystem) target_link_libraries(${libcxx_target} cxx_filesystem) endif() target_link_libraries(${libcxx_target} -lbenchmark) if (LLVM_USE_SANITIZER) target_link_libraries(${libcxx_target} -ldl) endif() set_target_properties(${libcxx_target} PROPERTIES OUTPUT_NAME "${name}.libcxx.out" RUNTIME_OUTPUT_DIRECTORY "${BENCHMARK_OUTPUT_DIR}" COMPILE_FLAGS "${BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS}" LINK_FLAGS "${BENCHMARK_TEST_LIBCXX_LINK_FLAGS}") if (LIBCXX_BENCHMARK_NATIVE_STDLIB) if (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++" AND NOT DEFINED LIBSTDCXX_FILESYSTEM_LIB AND "${name}" STREQUAL "filesystem") return() endif() set(native_target ${name}_native) add_executable(${native_target} EXCLUDE_FROM_ALL ${source_file}) add_dependencies(${native_target} google-benchmark-native google-benchmark-libcxx) target_link_libraries(${native_target} -lbenchmark) if (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++") target_link_libraries(${native_target} ${LIBSTDCXX_FILESYSTEM_LIB}) elseif (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++") target_link_libraries(${native_target} -lc++fs -lc++experimental) endif() if (LIBCXX_HAS_PTHREAD_LIB) target_link_libraries(${native_target} -pthread) endif() add_dependencies(cxx-benchmarks ${native_target}) set_target_properties(${native_target} PROPERTIES OUTPUT_NAME "${name}.native.out" RUNTIME_OUTPUT_DIRECTORY "${BENCHMARK_OUTPUT_DIR}" INCLUDE_DIRECTORIES "" COMPILE_FLAGS "${BENCHMARK_TEST_NATIVE_COMPILE_FLAGS}" LINK_FLAGS "${BENCHMARK_TEST_NATIVE_LINK_FLAGS}") endif() endfunction() #============================================================================== # Register Benchmark tests #============================================================================== file(GLOB BENCHMARK_TESTS "*.bench.cpp") foreach(test_path ${BENCHMARK_TESTS}) get_filename_component(test_file "${test_path}" NAME) string(REPLACE ".bench.cpp" "" test_name "${test_file}") if (NOT DEFINED ${test_name}_REPORTED) message(STATUS "Adding Benchmark: ${test_file}") # Only report the adding of the benchmark once. set(${test_name}_REPORTED ON CACHE INTERNAL "") endif() add_benchmark_test(${test_name} ${test_file}) endforeach() if (LIBCXX_INCLUDE_TESTS) include(AddLLVM) if (NOT DEFINED LIBCXX_TEST_DEPS) message(FATAL_ERROR "Expected LIBCXX_TEST_DEPS to be defined") endif() configure_lit_site_cfg( ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.py.in ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg.py) set(BENCHMARK_LIT_ARGS "--show-all --show-xfail --show-unsupported ${LIT_ARGS_DEFAULT}") add_lit_target(check-cxx-benchmarks "Running libcxx benchmarks tests" ${CMAKE_CURRENT_BINARY_DIR} DEPENDS cxx-benchmarks ${LIBCXX_TEST_DEPS} ARGS ${BENCHMARK_LIT_ARGS}) endif()