The only library produced on our output is TMSVCLUIPackPkgDXE14.a, the others fail, and we have no way to inspect what is the problem (except there are logs somewhere). Unfortunately we cannot build manually since we did not buy the Delphi personality.
This was a quick one, specially after locating the log file. C++ builder 11.2 has an issue and in the 64 bit default global library lookup, it did not include the 64 bit DCP path but the 32 bit one. Fixed it and voila everything works as normal !
Yes, there is indeed a new bug in C++Builder 11.2
I hope Embarcadero addresses this soon.