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      1 function(find_compiler_rt_library name dest)
      2   if (NOT DEFINED LIBCXX_COMPILE_FLAGS)
      3     message(FATAL_ERROR "LIBCXX_COMPILE_FLAGS must be defined when using this function")
      4   endif()
      5   set(dest "" PARENT_SCOPE)
      6   set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXX_COMPILE_FLAGS}
      7       "--rtlib=compiler-rt" "--print-libgcc-file-name")
      8   if (CMAKE_CXX_COMPILER_ID MATCHES Clang AND CMAKE_CXX_COMPILER_TARGET)
      9     list(APPEND CLANG_COMMAND "--target=${CMAKE_CXX_COMPILER_TARGET}")
     10   endif()
     11   execute_process(
     12       COMMAND ${CLANG_COMMAND}
     13       RESULT_VARIABLE HAD_ERROR
     14       OUTPUT_VARIABLE LIBRARY_FILE
     15   )
     16   string(STRIP "${LIBRARY_FILE}" LIBRARY_FILE)
     17   string(REPLACE "builtins" "${name}" LIBRARY_FILE "${LIBRARY_FILE}")
     18   if (NOT HAD_ERROR AND EXISTS "${LIBRARY_FILE}")
     19     message(STATUS "Found compiler-rt library: ${LIBRARY_FILE}")
     20     set(${dest} "${LIBRARY_FILE}" PARENT_SCOPE)
     21   else()
     22     message(STATUS "Failed to find compiler-rt library")
     23   endif()
     24 endfunction()
     25 
     26 function(find_compiler_rt_dir dest)
     27   if (NOT DEFINED LIBCXX_COMPILE_FLAGS)
     28     message(FATAL_ERROR "LIBCXX_COMPILE_FLAGS must be defined when using this function")
     29   endif()
     30   set(dest "" PARENT_SCOPE)
     31   if (APPLE)
     32     set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXX_COMPILE_FLAGS}
     33         "-print-file-name=lib")
     34     execute_process(
     35         COMMAND ${CLANG_COMMAND}
     36         RESULT_VARIABLE HAD_ERROR
     37         OUTPUT_VARIABLE LIBRARY_DIR
     38     )
     39     string(STRIP "${LIBRARY_DIR}" LIBRARY_DIR)
     40     set(LIBRARY_DIR "${LIBRARY_DIR}/darwin")
     41   else()
     42     set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXX_COMPILE_FLAGS}
     43         "--rtlib=compiler-rt" "--print-libgcc-file-name")
     44     execute_process(
     45         COMMAND ${CLANG_COMMAND}
     46         RESULT_VARIABLE HAD_ERROR
     47         OUTPUT_VARIABLE LIBRARY_FILE
     48     )
     49     string(STRIP "${LIBRARY_FILE}" LIBRARY_FILE)
     50     get_filename_component(LIBRARY_DIR "${LIBRARY_FILE}" DIRECTORY)
     51   endif()
     52   if (NOT HAD_ERROR AND EXISTS "${LIBRARY_DIR}")
     53     message(STATUS "Found compiler-rt directory: ${LIBRARY_DIR}")
     54     set(${dest} "${LIBRARY_DIR}" PARENT_SCOPE)
     55   else()
     56     message(STATUS "Failed to find compiler-rt directory")
     57   endif()
     58 endfunction()
     59