1 # - Try to find the Clang/LLVM executable

     2 # Once done this will define

     3 #

     4 #  CLANG_FOUND       - system has Clang

     5 #  CLANG_VERSION     - Clang version

     6 #  CLANG_EXECUTABLE  - Clang executable

     7 #

     8 # Copyright (c) 2013, Vittorio Giovara <vittorio.giovara@gmail.com>

     9 #

    10 # Redistribution and use is allowed according to the terms of the BSD license.

    11 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.

    12 

    13 find_program(CLANG_EXECUTABLE

    14         NAMES clang-mp-3.3 clang-mp-3.2 clang-mp-3.1 clang-mp-3.0 clang

    15         PATHS /opt/local/bin /usr/local/bin /usr/bin)

    16 

    17 if (CLANG_EXECUTABLE)

    18     execute_process(COMMAND ${CLANG_EXECUTABLE} --version

    19                     OUTPUT_VARIABLE CLANG_VERSION_OUTPUT

    20                     ERROR_VARIABLE CLANG_VERSION_ERROR

    21                     RESULT_VARIABLE CLANG_VERSION_RESULT

    22                     OUTPUT_STRIP_TRAILING_WHITESPACE

    23                     )

    24 

    25     if(${CLANG_VERSION_RESULT} EQUAL 0)

    26         string(REGEX MATCH "[0-9]+\\.[0-9]+" CLANG_VERSION "${CLANG_VERSION_OUTPUT}")

    27         string(REGEX REPLACE "([0-9]+\\.[0-9]+)" "\\1" CLANG_VERSION "${CLANG_VERSION}")

    28     else()

    29         message(SEND_ERROR "Command \"${CLANG_EXECUTABLE} --version\" failed with output: ${CLANG_VERSION_ERROR}")

    30     endif()

    31 endif()

    32 

    33 include(FindPackageHandleStandardArgs)

    34 find_package_handle_standard_args(Clang DEFAULT_MSG CLANG_EXECUTABLE CLANG_VERSION)

    35 mark_as_advanced(CLANG_VERSION)

    36