Specifying options for dependencies

[davidchisnall]

In a few cases, we’ve wanted to be able to specify that a target depends on another target and that the dependency must be built with a specific option. At the moment, we just end up documenting increasingly long xmake config strings that you must run.

Is there something I can use in a target to change the default for an option? Can I set it in on_load or similar? It would be nice to be able to explicitly define option values as dependencies, I’m not sure if such a thing exists already.

[waruqi]

option("foo", {description = "add foo dep", default = false})

target("foo")
    set_default(false)
    set_kind("static")
    add_files("src/*.cpp")

target("test")
    set_kind("binary")
    add_files("src/*.cpp")
    if has_config("foo") then
        add_deps("foo")
    end

[davidchisnall]

That's the other way around from what I was asking.

Target foo defines and uses option baz.

Target bar depends on foo and requires that foo be configured with option baz is set (or, in some cases, requires that it is not set).