Alp Mestanogullari authored Feb 15, 2018 and Moritz Angermann committed Feb 15, 2018

The make build system appears to be doing a bit of magic in order to supply
the profiled flavours of libHSrts and libCffi, as they're not advertised in
the 'extra-library-flavours' field of rts.cabal.in. This patch explicitly
advertises _p and _thr_p flavours of the RTS library and libCffi, but only
when the RTS is configured with the (newly introduced) 'profiling' flag.

This is necessary for Hadrian, as a branch (soon to be merged) does away with
ghc-cabal and relies just on Cabal to get package information. Without this
patch, Cabal can never inform us that _p and _thr_p flavours should be
built (and registered in the package db) as well, which obviously prevents us
from building a profiled GHC.

Reviewers: bgamari, erikd, simonmar

Reviewed By: bgamari

Subscribers: rwbarton, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4409