cmake examples

cmake execute_process(ECHO_OUTPUT_VARIABLE) examples

microsoft/vcpkg ports/chakracore/portfile.cmake :51

execute_process(
    COMMAND bash "build.sh" "--arch=${CHAKRACORE_TARGET_ARCH}" "--debug" "-j=${VCPKG_CONCURRENCY}"
    WORKING_DIRECTORY "${SOURCE_PATH}"

    OUTPUT_VARIABLE CHAKRA_BUILD_SH_OUT
    ERROR_VARIABLE CHAKRA_BUILD_SH_ERR
    RESULT_VARIABLE CHAKRA_BUILD_SH_RES
    ECHO_OUTPUT_VARIABLE
    ECHO_ERROR_VARIABLE
)

microsoft/vcpkg ports/chakracore/portfile.cmake :65

execute_process(
    COMMAND bash "build.sh" "--arch=${CHAKRACORE_TARGET_ARCH}" "-j=${VCPKG_CONCURRENCY}"
    WORKING_DIRECTORY "${SOURCE_PATH}"
    OUTPUT_VARIABLE CHAKRA_BUILD_SH_OUT
    ERROR_VARIABLE CHAKRA_BUILD_SH_ERR
    RESULT_VARIABLE CHAKRA_BUILD_SH_RES
    ECHO_OUTPUT_VARIABLE
    ECHO_ERROR_VARIABLE
)

Viskores/viskores CMake/testing/ViskoresPerformanceTestLib.cmake :35

execute_process(
  ${ARGV}
  COMMAND_ECHO STDOUT
  ECHO_OUTPUT_VARIABLE
  ECHO_ERROR_VARIABLE
  COMMAND_ERROR_IS_FATAL ANY
  )