# - Try to find the Clang/LLVM executable

# Once done this will define

#

#  EMSCRIPTEN_FOUND       - system has Clang

#  EMSCRIPTEN_VERSION     - Clang version

#  EMSCRIPTEN_EXECUTABLE  - Clang executable

#

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

#

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

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

find_program(EMSCRIPTEN_EXECUTABLE

        NAMES emcc

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

if (EMSCRIPTEN_EXECUTABLE)

    execute_process(COMMAND ${EMSCRIPTEN_EXECUTABLE} -v

                    OUTPUT_VARIABLE EMSCRIPTEN_VERSION_OUTPUT

                    ERROR_VARIABLE EMSCRIPTEN_VERSION_ERROR

                    RESULT_VARIABLE EMSCRIPTEN_VERSION_RESULT

                    OUTPUT_STRIP_TRAILING_WHITESPACE

                    )

    if(${EMSCRIPTEN_VERSION_RESULT} EQUAL 0)

        string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" EMSCRIPTEN_VERSION "${EMSCRIPTEN_VERSION_OUTPUT}")

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

    else()

        message(SEND_ERROR "Command \"${EMSCRIPTEN_EXECUTABLE} --version\" failed with output: ${EMSCRIPTEN_VERSION_ERROR}")

    endif()

endif()

include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(Emscripten DEFAULT_MSG EMSCRIPTEN_EXECUTABLE EMSCRIPTEN_VERSION)

mark_as_advanced(EMSCRIPTEN_VERSION)