cmake/EthUtils.cmake


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#
# renames the file if it is different from its destination
include(CMakeParseArguments)
#
macro(replace_if_different SOURCE DST)
    set(extra_macro_args ${ARGN})
    set(options CREATE)
    set(one_value_args)
    set(multi_value_args)
    cmake_parse_arguments(REPLACE_IF_DIFFERENT "${options}" "${one_value_args}" "${multi_value_args}" "${extra_macro_args}")

    if (REPLACE_IF_DIFFERENT_CREATE AND (NOT (EXISTS "${DST}")))
        file(WRITE "${DST}" "")
    endif()

    execute_process(COMMAND ${CMAKE_COMMAND} -E compare_files "${SOURCE}" "${DST}" RESULT_VARIABLE DIFFERENT OUTPUT_QUIET ERROR_QUIET)

    if (DIFFERENT)
        execute_process(COMMAND ${CMAKE_COMMAND} -E rename "${SOURCE}" "${DST}")
    else()
        execute_process(COMMAND ${CMAKE_COMMAND} -E remove "${SOURCE}")
    endif()
endmacro()

macro(eth_default_option O DEF)
    if (DEFINED ${O})
        if (${${O}})
            set(${O} ON)
        else ()
            set(${O} OFF)
        endif()
    else ()
        set(${O} ${DEF})
    endif()
endmacro()