1 

     2 #only Clang is supported

     3 if(CLANG)

     4     set(clang_executable ${CLANG})

     5 else()

     6     find_program(clang_executable

     7         NAMES clang-mp-3.2 clang-mp-3.1 clang-mp-3.0 clang

     8         PATHS /opt/local/bin /usr/local/bin /usr/bin)

     9 endif()

    10 

    11 if (clang_executable)

    12     exec_program(${clang_executable} ARGS "-v" OUTPUT_VARIABLE clang_version_full)

    13     string(REGEX MATCH "[0-9]+\\.[0-9]+" clang_version_long "${clang_version_full}")

    14     string(REGEX REPLACE "([0-9]+\\.[0-9]+)" "\\1" clang_version "${clang_version_long}")

    15     #TODO: check version >= 3.0

    16     message(STATUS "Found CLANG: ${clang_executable} (version ${clang_version})")

    17 else()

    18     message(FATAL_ERROR "No LLVM/Clang compiler found (required for engine_c target)")

    19 endif()

    20 

    21 set(CMAKE_C_COMPILER ${clang_executable})

    22 

    23