Gradle cpp on hpux

I found the gradle cpp plugin(cpp-application/cpp-library) to be very interesting and next generation build tool.
after seeing what it is capable of on windows and linux, i proposed my team to use gradle instead of cmake for our enterprise application.

But I see there is no support for gradle cpp plugin for hpux, solaris, AIX targetMachines currently.

Is there any workaround or tweak to make basic compilation working on these operating systems?

Need your inputs as soon as possible.