#==============================================================================
# Build Google Benchmark for libc++
#==============================================================================
-check_cxx_compiler_flag(-stdlib=libc++ LIBCXX_HAS_NO_STDLIB_LIBCXX_FLAG)
-if (NOT LIBCXX_HAS_NO_STDLIB_LIBCXX_FLAG)
- message(FATAL "Benchmark requires support for the -stdlib=libc++ flag")
-endif()
set(BENCHMARK_LIBCXX_COMPILE_FLAGS
-Wno-unused-command-line-argument
-nostdinc++
- -cxx-isystem ${LIBCXX_SOURCE_DIR}/include
- -stdlib=libc++)
-set(BENCHMARK_LIBCXX_LINK_FLAGS
+ -isystem ${LIBCXX_SOURCE_DIR}/include
-L${LIBCXX_LIBRARY_DIR}
- -Wl,-rpath,${LIBCXX_LIBRARY_DIR})
+ -Wl,-rpath,${LIBCXX_LIBRARY_DIR}
+ )
+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()
split_list(BENCHMARK_LIBCXX_COMPILE_FLAGS)
-split_list(BENCHMARK_LIBCXX_LINK_FLAGS)
ExternalProject_Add(google-benchmark-libcxx
EXCLUDE_FROM_ALL ON
-DCMAKE_BUILD_TYPE:STRING=RELEASE
-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
-DCMAKE_CXX_FLAGS:STRING=${BENCHMARK_LIBCXX_COMPILE_FLAGS}
- -DCMAKE_SHARED_LINK_FLAGS:STRING=${BENCHMARK_LIBCXX_LINK_FLAGS}
- -DCMAKE_EXE_LINK_FLAGS:STRING=${BENCHMARK_LIBCXX_LINK_FLAGS}
+ -DBENCHMARK_USE_LIBCXX:BOOL=ON
-DBENCHMARK_ENABLE_TESTING:BOOL=OFF)
#==============================================================================
SOURCE_DIR ${LIBCXX_SOURCE_DIR}/utils/google-benchmark
INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native
CMAKE_CACHE_ARGS
- -DBENCHMARK_ENABLE_TESTING:BOOL=OFF
- CMAKE_CACHE_ARGS
-DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
-DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
-DCMAKE_BUILD_TYPE:STRING=RELEASE
- -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>)
+ -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
+ -DBENCHMARK_ENABLE_TESTING:BOOL=OFF)
endif()
#==============================================================================
# Benchmark tests configuration
#==============================================================================
-add_custom_target(libcxx-benchmarks)
+add_custom_target(cxx-benchmarks)
set(BENCHMARK_LIBCXX_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx)
set(BENCHMARK_NATIVE_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native)
)
set(BENCHMARK_TEST_LIBCXX_COMPILE_FLAGS
-nostdinc++
- -cxx-isystem ${LIBCXX_SOURCE_DIR}/include
+ -isystem ${LIBCXX_SOURCE_DIR}/include
${BENCHMARK_TEST_COMPILE_FLAGS}
-Wno-user-defined-literals
)
set(libcxx_target ${name}_libcxx)
add_executable(${libcxx_target} EXCLUDE_FROM_ALL ${source_file})
add_dependencies(${libcxx_target} cxx google-benchmark-libcxx)
- add_dependencies(libcxx-benchmarks ${libcxx_target})
+ add_dependencies(cxx-benchmarks ${libcxx_target})
if (LIBCXX_ENABLE_SHARED)
target_link_libraries(${libcxx_target} cxx_shared)
else()
if (LIBCXX_HAS_PTHREAD_LIB)
target_link_libraries(${native_target} -pthread)
endif()
- add_dependencies(libcxx-benchmarks ${native_target})
+ add_dependencies(cxx-benchmarks ${native_target})
set_target_properties(${native_target}
PROPERTIES
OUTPUT_NAME "${name}.native.out"
file(GLOB BENCHMARK_TESTS "*.bench.cpp")
foreach(test_path ${BENCHMARK_TESTS})
get_filename_component(test_file "${test_path}" NAME)
- message(STATUS "TEST: ${test_file}")
+ message(STATUS "-- Adding Benchmark: ${test_file}")
string(REPLACE ".bench.cpp" "" test_name "${test_file}")
add_benchmark_test(${test_name} ${test_file})
endforeach()
Building Benchmarks
-------------------
-The benchmark tests are not enabled by default. To build the benchmarks
-libc++ must be configured using the CMake option ``-DLIBCXX_INCLUDE_BENCHMARKS=ON``.
-Then the benchmarks can be built using the ``libcxx-benchmarks`` target.
+The benchmark tests are not built by default. The benchmarks can be built using
+the ``cxx-benchmarks`` target.
An example build would look like:
.. code-block:: bash
$ cd build
- $ cmake [options] -DLIBCXX_INCLUDE_BENCHMARKS=ON <path to libcxx sources>
- $ make libcxx-benchmarks
+ $ cmake [options] <path to libcxx sources>
+ $ make cxx-benchmarks
This will build all of the benchmarks under ``<libcxx-src>/benchmarks`` to be
built against the just-built libc++. The compiled tests are output into
.. code-block:: bash
$ cd build/benchmarks
- $ make libcxx-benchmarks
+ $ make cxx-benchmarks
$ ./algorithms.libcxx.out # Runs all the benchmarks
$ ./algorithms.libcxx.out --benchmark_filter=BM_Sort.* # Only runs the sort benchmarks