No, I'm 99% sure it's targeting cRIO. For one, the build directory is for PPC. I'm using the cross-compiler provided by NI (gccdist) and the very nice ucpp project (
https://github.com/nikitakit/ucpp). The makefile is virtually identical to the standard one given by NI.
I would use WindRiver, if I had it. But I wasn't able to get another copy of the license file. I need to make sure that everything works correctly before build season starts though, so necessity dictates I hack something together.