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# check for gcc/clang atomic builtins like __sync_add_and_fetch
if(NOT WIN32 OR MINGW)
if(EMSCRIPTEN)
set(ITK_HAVE_SYNC_BUILTINS 0 CACHE INTERNAL "For __sync atomic builtins.")
elseif(NOT DEFINED ITK_HAVE_SYNC_BUILTINS)
message(STATUS "Checking for builtin __sync_add_and_fetch")
try_compile(ITK_TEST_SYNC_BUILTINS_COMPILED
${ITK_BINARY_DIR}
${CMAKE_CURRENT_SOURCE_DIR}/CMake/itkCheckSyncBuiltins.cxx
OUTPUT_VARIABLE OUTPUT)
if(ITK_TEST_SYNC_BUILTINS_COMPILED)
message(STATUS "Checking for builtin __sync_add_and_fetch -- success")
set(ITK_HAVE_SYNC_BUILTINS 1 CACHE INTERNAL "For __sync atomic builtins.")
file(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
"Determining if the C++ compiler supports __sync_add_and_fetch builtin "
"passed with the following output:\n"
"${OUTPUT}\n")
else()
message(STATUS "Checking for builtin __sync_add_and_fetch -- failed")
set(ITK_HAVE_SYNC_BUILTINS 0 CACHE INTERNAL "For __sync atomic builtins.")
file(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
"Determining if the C++ compiler supports __sync_add_and_fetch builtin "
"failed with the following output:\n"
"${OUTPUT}\n")
endif()
endif()
endif()
|
