想在package里面获取qt sdk的路径

[XimingCheng]

在编译额外的cmake qt库的时候，需要指定-DCMAKE_PREFIX_PATH=QT_SDK_path
不知道xmake里面如何获取这个路径，不想写死

 package("Qt-Advanced-Docking-System")
            add_deps("cmake")
            add_urls("https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System.git")
            add_versions("auto_hide_feature", "5a185268c44404e720fb751b011b13f8d3bc2d8b")
            add_includedirs("src")
            on_install(function (package)
                local configs = {}
                table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
                table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
                table.insert(configs, "-DCMAKE_PREFIX_PATH=" .. qt)
                import("package.tools.cmake").install(package, configs)
            end)
 package_end()

[waruqi]

如果走 xmake-repo 仓库的 qt5 包，可以参考 https://github.com/xmake-io/xmake-repo/blob/25d546a1792798b124b4177fb470fbcc54e86af7/packages/n/nodeeditor/xmake.lua#L25

如果走 xmake f --qt=/xxx 自己设置 qt sdk 编译的，那就直接 local qtsdk = get_config("qt") 取下

[XimingCheng]

谢谢！