# Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# ----------------------------------------------------------------------------
# section: Provides an paddle lite config option macro
# usage：  lite_option(var "help string to describe the var" [if or IF (condition)])
# ----------------------------------------------------------------------------
macro(lite_option variable description value)
    set(__value ${value})
    set(__condition "")
    set(__varname "__value")
    foreach(arg ${ARGN})
        if(arg STREQUAL "IF" OR arg STREQUAL "if")
            set(__varname "__condition")
        else()
            list(APPEND ${__varname} ${arg})
        endif()
    endforeach()
    unset(__varname)
    if(__condition STREQUAL "")
        set(__condition 2 GREATER 1)
    endif()

    if(${__condition})
        if(__value MATCHES ";")
            if(${__value})
                option(${variable} "${description}" ON)
            else()
                option(${variable} "${description}" OFF)
            endif()
        elseif(DEFINED ${__value})
            if(${__value})
                option(${variable} "${description}" ON)
            else()
                option(${variable} "${description}" OFF)
            endif()
        else()
             option(${variable} "${description}" ${__value})
        endif()
    else()
        unset(${variable} CACHE)
    endif()
    unset(__condition)
    unset(__value)
endmacro()