After exporting the implemented and generated project from PlanAhead to Xilinx SDK and having generated a Board Support Package, the build stops with an error due to make crashing with a rather dubious message along the lines of
make: Interrupt/Exception caught (code = 0xc00000fd, addr = 0x4227d3)
It turned out that this is due to an existing installation of Git, when the Git directory is added to the path. Specifically, sh.exe is the problem here and simply removing that from (or renaming it in) the Git installation directory solves the problem.
Thanks!!!