[OE-core] [meta-xilinx] libpcre_8.21.bb: IOError: invalid Python installation

[Elvis Dowson]

Hi,
      I noticed a situation where, when I try to bitbake linux-xilinx, it fails a libpcre, because of an invalid python instalation. 

However, after doing a bitbake -c clean linux-xilinx libpcre, and then rebuilding libpcre, python-native gets staged correctly and the build succeeds.

Shouldn't python-native get built correctly the first time around? 

My parallelism options as follows:

BB_NUMBER_THREADS = "6"
PARALLEL_MAKE = "-j 6"

Best regards,

Elvis Dowson