I have a question about platform-specific libraries. For example Ktor. Let’s say, I use Ktor only in the shared project. And the shared project just has “CommonMain”. So, it doesn’t have neither “AndroidMain” nor “IosMain”. All the shared code is written in CommonMain and it’s perfectly compatible for both. There is not expect/actual implementation. In such case, do I still need to add platform-specific libraries such as “io.ktor:ktor-client-core-jvm”. And considering “AndroidMain” doesn’t exist, should I add it in “CommonMain” sourceset?

Even if all your code is in common, you still need to explicitly declare what targets to build for. And those come with source-sets you can declare dependencies for, even if you don't have any code in them.

@russhwolf thanks! so are “androidMain” and “iosMain” predefined keywords?

It's generated from the target name. When you do

android()

, that's implicitly

android("android")

, and that creates an

androidMain

source. You could also do

android("foo")

and get

fooMain

instead.

ok, I see, thanks!