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150
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1 include(ExternalProject)
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2 include(CheckCXXCompilerFlag)
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3
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4 #==============================================================================
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5 # Build Google Benchmark for libc++
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6 #==============================================================================
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7
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8 set(BENCHMARK_LIBCXX_COMPILE_FLAGS
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9 -Wno-unused-command-line-argument
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10 -nostdinc++
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11 -isystem ${LIBCXX_SOURCE_DIR}/include
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12 -L${LIBCXX_LIBRARY_DIR}
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13 -Wl,-rpath,${LIBCXX_LIBRARY_DIR}
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14 ${SANITIZER_FLAGS}
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15 )
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16 if (DEFINED LIBCXX_CXX_ABI_LIBRARY_PATH)
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17 list(APPEND BENCHMARK_LIBCXX_COMPILE_FLAGS
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18 -L${LIBCXX_CXX_ABI_LIBRARY_PATH}
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19 -Wl,-rpath,${LIBCXX_CXX_ABI_LIBRARY_PATH})
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20 endif()
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21 if (LIBCXX_NEEDS_SITE_CONFIG)
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22 list(APPEND BENCHMARK_LIBCXX_COMPILE_FLAGS -include "${LIBCXX_BINARY_DIR}/__config_site")
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23 endif()
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24 split_list(BENCHMARK_LIBCXX_COMPILE_FLAGS)
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25
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26 ExternalProject_Add(google-benchmark-libcxx
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27 EXCLUDE_FROM_ALL ON
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28 DEPENDS cxx cxx-headers
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29 PREFIX benchmark-libcxx
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30 SOURCE_DIR ${LIBCXX_SOURCE_DIR}/utils/google-benchmark
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31 INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx
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32 CMAKE_CACHE_ARGS
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33 -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
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34 -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
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35 -DCMAKE_BUILD_TYPE:STRING=RELEASE
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36 -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
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37 -DCMAKE_CXX_FLAGS:STRING=${BENCHMARK_LIBCXX_COMPILE_FLAGS}
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38 -DBENCHMARK_USE_LIBCXX:BOOL=ON
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39 -DBENCHMARK_ENABLE_TESTING:BOOL=OFF)
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40
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41 #==============================================================================
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42 # Build Google Benchmark for the native stdlib
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43 #==============================================================================
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44 set(BENCHMARK_NATIVE_TARGET_FLAGS)
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45 if (LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN)
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46 set(BENCHMARK_NATIVE_TARGET_FLAGS
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47 -gcc-toolchain ${LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN})
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48 endif()
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49 split_list(BENCHMARK_NATIVE_TARGET_FLAGS)
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50
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51 if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
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52 ExternalProject_Add(google-benchmark-native
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53 EXCLUDE_FROM_ALL ON
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54 PREFIX benchmark-native
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55 SOURCE_DIR ${LIBCXX_SOURCE_DIR}/utils/google-benchmark
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56 INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native
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57 CMAKE_CACHE_ARGS
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58 -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
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59 -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
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60 -DCMAKE_CXX_FLAGS:STRING=${BENCHMARK_NATIVE_TARGET_FLAGS}
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61 -DCMAKE_BUILD_TYPE:STRING=RELEASE
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62 -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
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63 -DBENCHMARK_ENABLE_TESTING:BOOL=OFF)
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64 endif()
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65
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66
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67 #==============================================================================
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68 # Benchmark tests configuration
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69 #==============================================================================
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70 add_custom_target(cxx-benchmarks)
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71 set(BENCHMARK_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
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72 set(BENCHMARK_LIBCXX_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx)
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73 set(BENCHMARK_NATIVE_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native)
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74
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75 check_flag_supported("-std=c++17")
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76 mangle_name("LIBCXX_SUPPORTS_STD_EQ_c++17_FLAG" BENCHMARK_SUPPORTS_STD_CXX17_FLAG)
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77 if (${BENCHMARK_SUPPORTS_STD_CXX17_FLAG})
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78 set(BENCHMARK_DIALECT_FLAG "-std=c++17")
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79 else()
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80 # If the compiler doesn't support -std=c++17, attempt to fall back to -std=c++1z while still
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81 # requiring C++17 language features.
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82 set(BENCHMARK_DIALECT_FLAG "-std=c++1z")
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83 endif()
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84
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85 set(BENCHMARK_TEST_COMPILE_FLAGS
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86 ${BENCHMARK_DIALECT_FLAG} -O2
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87 -fsized-deallocation
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88 -I${BENCHMARK_LIBCXX_INSTALL}/include
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89 -I${LIBCXX_SOURCE_DIR}/test/support
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90 )
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91 set(BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS
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92 -nostdinc++
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93 -isystem ${LIBCXX_SOURCE_DIR}/include
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94 ${BENCHMARK_TEST_COMPILE_FLAGS}
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95 ${SANITIZER_FLAGS}
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96 -Wno-user-defined-literals
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97 )
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98
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99 set(BENCHMARK_TEST_LIBCXX_LINK_FLAGS
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100 -nodefaultlibs
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101 -L${BENCHMARK_LIBCXX_INSTALL}/lib/
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102 ${SANITIZER_FLAGS}
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103 )
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104 set(BENCHMARK_TEST_NATIVE_COMPILE_FLAGS
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105 ${BENCHMARK_NATIVE_TARGET_FLAGS}
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106 ${BENCHMARK_TEST_COMPILE_FLAGS}
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107 )
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108 set(BENCHMARK_TEST_NATIVE_LINK_FLAGS
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109 ${BENCHMARK_NATIVE_TARGET_FLAGS}
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110 -L${BENCHMARK_NATIVE_INSTALL}/lib
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111 )
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112 split_list(BENCHMARK_TEST_COMPILE_FLAGS)
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113 split_list(BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS)
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114 split_list(BENCHMARK_TEST_LIBCXX_LINK_FLAGS)
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115 split_list(BENCHMARK_TEST_NATIVE_COMPILE_FLAGS)
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116 split_list(BENCHMARK_TEST_NATIVE_LINK_FLAGS)
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117
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118 if (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++")
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119 find_library(LIBSTDCXX_FILESYSTEM_TEST stdc++fs
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120 PATHS ${LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN}
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121 PATH_SUFFIXES lib lib64
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122 DOC "The libstdc++ filesystem library used by the benchmarks"
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123 )
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124 if (NOT "${LIBSTDCXX_FILESYSTEM_TEST}" STREQUAL "LIBSTDCXX_FILESYSTEM_TEST-NOTFOUND")
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125 set(LIBSTDCXX_FILESYSTEM_LIB "stdc++fs")
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126 endif()
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127 endif()
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128
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129 set(libcxx_benchmark_targets)
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130
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131 function(add_benchmark_test name source_file)
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132 set(libcxx_target ${name}_libcxx)
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133 list(APPEND libcxx_benchmark_targets ${libcxx_target})
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134 add_executable(${libcxx_target} EXCLUDE_FROM_ALL ${source_file})
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135 add_dependencies(${libcxx_target} cxx cxx-headers google-benchmark-libcxx)
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136 add_dependencies(cxx-benchmarks ${libcxx_target})
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137 if (LIBCXX_ENABLE_SHARED)
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138 target_link_libraries(${libcxx_target} PRIVATE cxx_shared)
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139 else()
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140 target_link_libraries(${libcxx_target} PRIVATE cxx_static)
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141 endif()
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142 if (TARGET cxx_experimental)
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143 target_link_libraries(${libcxx_target} PRIVATE cxx_experimental)
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144 endif()
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145 target_link_libraries(${libcxx_target} PRIVATE -lbenchmark)
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146 if (LLVM_USE_SANITIZER)
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147 target_link_libraries(${libcxx_target} PRIVATE -ldl)
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148 endif()
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149 set_target_properties(${libcxx_target}
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150 PROPERTIES
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151 OUTPUT_NAME "${name}.libcxx.out"
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152 RUNTIME_OUTPUT_DIRECTORY "${BENCHMARK_OUTPUT_DIR}"
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153 COMPILE_FLAGS "${BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS}"
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154 LINK_FLAGS "${BENCHMARK_TEST_LIBCXX_LINK_FLAGS}")
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155 cxx_link_system_libraries(${libcxx_target})
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156 if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
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157 if (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++" AND NOT DEFINED LIBSTDCXX_FILESYSTEM_LIB
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158 AND "${name}" STREQUAL "filesystem")
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159 return()
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160 endif()
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161 set(native_target ${name}_native)
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162 add_executable(${native_target} EXCLUDE_FROM_ALL ${source_file})
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163 add_dependencies(${native_target} google-benchmark-native
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164 google-benchmark-libcxx)
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165 target_link_libraries(${native_target} PRIVATE -lbenchmark)
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166 if (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++")
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167 target_link_libraries(${native_target} PRIVATE ${LIBSTDCXX_FILESYSTEM_LIB})
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168 elseif (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++")
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169 target_link_libraries(${native_target} PRIVATE -lc++fs -lc++experimental)
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170 endif()
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171 if (LIBCXX_HAS_PTHREAD_LIB)
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172 target_link_libraries(${native_target} PRIVATE -pthread)
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173 endif()
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174 add_dependencies(cxx-benchmarks ${native_target})
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175 set_target_properties(${native_target}
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176 PROPERTIES
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177 OUTPUT_NAME "${name}.native.out"
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178 RUNTIME_OUTPUT_DIRECTORY "${BENCHMARK_OUTPUT_DIR}"
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179 INCLUDE_DIRECTORIES ""
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180 COMPILE_FLAGS "${BENCHMARK_TEST_NATIVE_COMPILE_FLAGS}"
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181 LINK_FLAGS "${BENCHMARK_TEST_NATIVE_LINK_FLAGS}")
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182 endif()
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183 endfunction()
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184
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185
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186 #==============================================================================
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187 # Register Benchmark tests
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188 #==============================================================================
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189 file(GLOB BENCHMARK_TESTS "*.bench.cpp")
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190 foreach(test_path ${BENCHMARK_TESTS})
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191 get_filename_component(test_file "${test_path}" NAME)
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192 string(REPLACE ".bench.cpp" "" test_name "${test_file}")
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193 if (NOT DEFINED ${test_name}_REPORTED)
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194 message(STATUS "Adding Benchmark: ${test_file}")
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195 # Only report the adding of the benchmark once.
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196 set(${test_name}_REPORTED ON CACHE INTERNAL "")
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197 endif()
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198 add_benchmark_test(${test_name} ${test_file})
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199 endforeach()
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200
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201 if (LIBCXX_INCLUDE_TESTS)
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202 include(AddLLVM)
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203
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204 if (NOT DEFINED LIBCXX_TEST_DEPS)
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205 message(FATAL_ERROR "Expected LIBCXX_TEST_DEPS to be defined")
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206 endif()
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207
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208 configure_lit_site_cfg(
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209 ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.py.in
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210 ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg.py)
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211
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212 set(BENCHMARK_LIT_ARGS "--show-all --show-xfail --show-unsupported ${LIT_ARGS_DEFAULT}")
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213
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214 add_lit_target(check-cxx-benchmarks
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215 "Running libcxx benchmarks tests"
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216 ${CMAKE_CURRENT_BINARY_DIR}
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217 DEPENDS cxx-benchmarks ${LIBCXX_TEST_DEPS}
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218 ARGS ${BENCHMARK_LIT_ARGS})
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219 endif()
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