A new version is out.

Just::Thread Pro v2.5.0 released with coroutines support

by Anthony Williams

From the article:

I am pleased to announce that Just::Thread Pro v2.5.0 has been released. This adds support for gcc 7, clang 4.0 and clang 5.0, but the big change with this version is the support for coroutines with Microsoft Visual Studio 2017, and clang 5.0 on ubuntu when used with libc++ 5.0.