diff options
Diffstat (limited to 'utils/google-benchmark/cmake/CXXFeatureCheck.cmake')
| -rw-r--r-- | utils/google-benchmark/cmake/CXXFeatureCheck.cmake | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/utils/google-benchmark/cmake/CXXFeatureCheck.cmake b/utils/google-benchmark/cmake/CXXFeatureCheck.cmake new file mode 100644 index 0000000000000..b106f32b63934 --- /dev/null +++ b/utils/google-benchmark/cmake/CXXFeatureCheck.cmake @@ -0,0 +1,44 @@ +# - Compile and run code to check for C++ features +# +# This functions compiles a source file under the `cmake` folder +# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake +# environment +# +# cxx_feature_check(<FLAG> [<VARIANT>]) +# +# - Example +# +# include(CXXFeatureCheck) +# cxx_feature_check(STD_REGEX) +# Requires CMake 2.6+ + +if(__cxx_feature_check) + return() +endif() +set(__cxx_feature_check INCLUDED) + +function(cxx_feature_check FILE) + string(TOLOWER ${FILE} FILE) + string(TOUPPER ${FILE} VAR) + string(TOUPPER "HAVE_${VAR}" FEATURE) + if (DEFINED HAVE_${VAR}) + return() + endif() + message("-- Performing Test ${FEATURE}") + try_run(RUN_${FEATURE} COMPILE_${FEATURE} + ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp + CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS} + LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES}) + if(RUN_${FEATURE} EQUAL 0) + message("-- Performing Test ${FEATURE} -- success") + set(HAVE_${VAR} 1 CACHE INTERNAL "Feature test for ${FILE}" PARENT_SCOPE) + add_definitions(-DHAVE_${VAR}) + else() + if(NOT COMPILE_${FEATURE}) + message("-- Performing Test ${FEATURE} -- failed to compile") + else() + message("-- Performing Test ${FEATURE} -- compiled but failed to run") + endif() + endif() +endfunction() + |