benchmarks/CMakeLists.txt

   1 include(ExternalProject)
   2 include(CheckCXXCompilerFlag)
   3
   4 #==============================================================================
   5 # Build Google Benchmark for libc++
   6 #==============================================================================
   7
   8 set(BENCHMARK_LIBCXX_COMPILE_FLAGS
   9     -Wno-unused-command-line-argument
  10     -nostdinc++
  11     -isystem ${LIBCXX_SOURCE_DIR}/include
  12     -L${LIBCXX_LIBRARY_DIR}
  13     -Wl,-rpath,${LIBCXX_LIBRARY_DIR}
  14     )
  15 if (DEFINED LIBCXX_CXX_ABI_LIBRARY_PATH)
  16   list(APPEND BENCHMARK_LIBCXX_COMPILE_FLAGS
  17           -L${LIBCXX_CXX_ABI_LIBRARY_PATH}
  18           -Wl,-rpath,${LIBCXX_CXX_ABI_LIBRARY_PATH})
  19 endif()
  20 split_list(BENCHMARK_LIBCXX_COMPILE_FLAGS)
  21
  22 ExternalProject_Add(google-benchmark-libcxx
  23         EXCLUDE_FROM_ALL ON
  24         DEPENDS cxx
  25         PREFIX benchmark-libcxx
  26         SOURCE_DIR ${LIBCXX_SOURCE_DIR}/utils/google-benchmark
  27         INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx
  28         CMAKE_CACHE_ARGS
  29           -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
  30           -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
  31           -DCMAKE_BUILD_TYPE:STRING=RELEASE
  32           -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
  33           -DCMAKE_CXX_FLAGS:STRING=${BENCHMARK_LIBCXX_COMPILE_FLAGS}
  34           -DBENCHMARK_USE_LIBCXX:BOOL=ON
  35           -DBENCHMARK_ENABLE_TESTING:BOOL=OFF)
  36
  37 #==============================================================================
  38 # Build Google Benchmark for the native stdlib
  39 #==============================================================================
  40 set(BENCHMARK_NATIVE_TARGET_FLAGS)
  41 if (LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN)
  42   set(BENCHMARK_NATIVE_TARGET_FLAGS
  43       -gcc-toolchain ${LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN})
  44 endif()
  45 split_list(BENCHMARK_NATIVE_TARGET_FLAGS)
  46
  47 if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
  48   ExternalProject_Add(google-benchmark-native
  49         EXCLUDE_FROM_ALL ON
  50         PREFIX benchmark-native
  51         SOURCE_DIR ${LIBCXX_SOURCE_DIR}/utils/google-benchmark
  52         INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native
  53         CMAKE_CACHE_ARGS
  54           -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
  55           -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
  56           -DCMAKE_CXX_FLAGS:STRING=${BENCHMARK_NATIVE_TARGET_FLAGS}
  57           -DCMAKE_BUILD_TYPE:STRING=RELEASE
  58           -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
  59           -DBENCHMARK_ENABLE_TESTING:BOOL=OFF)
  60 endif()
  61
  62
  63 #==============================================================================
  64 # Benchmark tests configuration
  65 #==============================================================================
  66 add_custom_target(cxx-benchmarks)
  67 set(BENCHMARK_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
  68 set(BENCHMARK_LIBCXX_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx)
  69 set(BENCHMARK_NATIVE_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native)
  70 set(BENCHMARK_TEST_COMPILE_FLAGS
  71     -std=c++17 -O2
  72     -I${BENCHMARK_LIBCXX_INSTALL}/include
  73     -I${LIBCXX_SOURCE_DIR}/test/support
  74 )
  75 set(BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS
  76     -nostdinc++
  77     -isystem ${LIBCXX_SOURCE_DIR}/include
  78     ${BENCHMARK_TEST_COMPILE_FLAGS}
  79     -Wno-user-defined-literals
  80 )
  81 set(BENCHMARK_TEST_LIBCXX_LINK_FLAGS
  82     -nodefaultlibs
  83     -L${BENCHMARK_LIBCXX_INSTALL}/lib/
  84 )
  85 set(BENCHMARK_TEST_NATIVE_COMPILE_FLAGS
  86   ${BENCHMARK_NATIVE_TARGET_FLAGS}
  87   ${BENCHMARK_TEST_COMPILE_FLAGS}
  88 )
  89 set(BENCHMARK_TEST_NATIVE_LINK_FLAGS
  90     ${BENCHMARK_NATIVE_TARGET_FLAGS}
  91     -L${BENCHMARK_NATIVE_INSTALL}/lib
  92 )
  93 split_list(BENCHMARK_TEST_COMPILE_FLAGS)
  94 split_list(BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS)
  95 split_list(BENCHMARK_TEST_LIBCXX_LINK_FLAGS)
  96 split_list(BENCHMARK_TEST_NATIVE_COMPILE_FLAGS)
  97 split_list(BENCHMARK_TEST_NATIVE_LINK_FLAGS)
  98 macro(add_benchmark_test name source_file)
  99   set(libcxx_target ${name}_libcxx)
 100   add_executable(${libcxx_target} EXCLUDE_FROM_ALL ${source_file})
 101   add_dependencies(${libcxx_target} cxx google-benchmark-libcxx)
 102   add_dependencies(cxx-benchmarks ${libcxx_target})
 103   if (LIBCXX_ENABLE_SHARED)
 104     target_link_libraries(${libcxx_target} cxx_shared)
 105   else()
 106     target_link_libraries(${libcxx_target} cxx_static)
 107   endif()
 108   if (TARGET cxx_experimental)
 109     target_link_libraries(${libcxx_target} cxx_experimental)
 110   endif()
 111   target_link_libraries(${libcxx_target} -lbenchmark)
 112   set_target_properties(${libcxx_target}
 113     PROPERTIES
 114           OUTPUT_NAME "${name}.libcxx.out"
 115           RUNTIME_OUTPUT_DIRECTORY "${BENCHMARK_OUTPUT_DIR}"
 116           COMPILE_FLAGS "${BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS}"
 117           LINK_FLAGS "${BENCHMARK_TEST_LIBCXX_LINK_FLAGS}")
 118   if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
 119     set(native_target ${name}_native)
 120     add_executable(${native_target} EXCLUDE_FROM_ALL ${source_file})
 121     add_dependencies(${native_target} google-benchmark-native
 122                                       google-benchmark-libcxx)
 123     target_link_libraries(${native_target} -lbenchmark)
 124     if (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++")
 125       target_link_libraries(${native_target} -lstdc++fs)
 126     elseif (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++")
 127       target_link_libraries(${native_target} -lc++experimental)
 128     endif()
 129     if (LIBCXX_HAS_PTHREAD_LIB)
 130       target_link_libraries(${native_target} -pthread)
 131     endif()
 132     add_dependencies(cxx-benchmarks ${native_target})
 133     set_target_properties(${native_target}
 134       PROPERTIES
 135           OUTPUT_NAME "${name}.native.out"
 136           RUNTIME_OUTPUT_DIRECTORY "${BENCHMARK_OUTPUT_DIR}"
 137           INCLUDE_DIRECTORIES ""
 138           COMPILE_FLAGS "${BENCHMARK_TEST_NATIVE_COMPILE_FLAGS}"
 139           LINK_FLAGS "${BENCHMARK_TEST_NATIVE_LINK_FLAGS}")
 140   endif()
 141 endmacro()
 142
 143
 144 #==============================================================================
 145 # Register Benchmark tests
 146 #==============================================================================
 147 file(GLOB BENCHMARK_TESTS "*.bench.cpp")
 148 foreach(test_path ${BENCHMARK_TESTS})
 149   get_filename_component(test_file "${test_path}" NAME)
 150   string(REPLACE ".bench.cpp" "" test_name "${test_file}")
 151   if (NOT DEFINED ${test_name}_REPORTED)
 152     message(STATUS "Adding Benchmark: ${test_file}")
 153     # Only report the adding of the benchmark once.
 154     set(${test_name}_REPORTED ON CACHE INTERNAL "")
 155   endif()
 156   add_benchmark_test(${test_name} ${test_file})
 157 endforeach()