Excerpts from Elliot Cameron's message of 2015-06-30 20:19:40 -0700:
"inplace/bin/ghc-cabal.exe" check libraries/bytestring 'ghc-options: -O2' is rarely needed. Check that it is giving a real benefit and not just imposing longer compile times on your users. libraries/bytestring/ghc.mk:4: recipe for target 'libraries/bytestring/dist-install/package-data.mk' failed make[1]: *** [libraries/bytestring/dist-install/package-data.mk] Error 1 Makefile:71: recipe for target 'all' failed make: *** [all] Error 2
We fixed this error (it was ghc-cabal not being sufficiently updated to handle some new Cabal behavior) but I'm surprised your build is failing because of it, because 7.10.1's shipped Cabal should not be tickling this bug. You have a few options: 1. Try again with a source distribution, since I suspect your submodules are not in order, or 2. Cherry pick 14652b519eca12411e92c28cd06de32612b0973a onto your branch, which fixes the bug. Edward