Repeat the problem qmake

Every time we execute qmake time will be very slow, because the CONFIG qmake duplicate attribute cause repeated.

  Because the project file will be automatically added to debug, release, debug_and_release variables added time, lead to qmake encounter these variables will perform another qmake, print function messagewill repeat output. This results in qmake become very slow. The solution: Remove the extra variables in the CONFIG .

  qmake function remove_extra_config_parameter main role is to remove duplicate debug, Debug, release, Release, debug_and_release property, only retains the properties of the last occurrence . This avoids repeated qmake problems.

defineReplace(remove_extra_config_parameter) {
    configs = $$1
    debug_and_release_params = # 匹配预选队列
    keys = debug Debug release Release debug_and_release
    for (iter, configs) {
        contains(keys, $$iter) {
            debug_and_release_params += $$iter
        }
    }

    for (iter, debug_and_release_params) {
        configs -= $$iter # 移除预选队列的属性
    }

    configs += $$last(debug_and_release_params) # 添加(保留)预选队列的最后属性

    return($$configs)
}

# 使用
CONFIG = $$remove_extra_config_parameter($$CONFIG)