Building HEAD with HEAD fails

[Edward Z. Yang]

So... I can't reproduce this.  I validated a copy of GHC HEAD,
and then used the inplace ghc-stage2 to build another using
./configure --with-ghc=... and it built fine.

Maybe, do you have some more details?

Edward

Excerpts from Edward Z. Yang's message of 2015-10-21 11:44:26 -0700:
> This is likely my fault, w.r.t. to the recent Cabal submodule update.
> I'm a bit confused why there are things in the DB that don't have ABI
> hashes though...
> 
> Edward
> 
> Excerpts from Gabor Greif's message of 2015-10-21 03:51:02 -0700:
> > Hi devs,
> > 
> > just a heads-up (pun intended...)
> > 
> > (After updating to TOT, boot and configure with a freshly installed
> > TOT ghc as bootstrap compiler. Then 'make clean'.)
> > 
> > Running 'make' gives:
> > 
> > ...
> > Creating includes/ghcplatform.h...
> > Done.
> > "rm" -f utils/hsc2hs/dist/build/.depend.haskell.tmp
> > "/home/ggreif/bin/ghc" -M -static  -H64m -O0 -fasm   -package-db
> > libraries/bootstrapping.conf  -hide-all-packages -i -iutils/hsc2hs/.
> > -iutils/hsc2hs/dist/build -iutils/hsc2hs/dist/build/autogen
> > -Iutils/hsc2hs/dist/build -Iutils/hsc2hs/dist/build/autogen
> > -optP-include -optPutils/hsc2hs/dist/build/autogen/cabal_macros.h
> > -package-id base-4.8.2.0 -package-id containers-0.5.6.2 -package-id
> > directory-1.2.2.0 -package-id filepath-1.4.0.0 -package-id
> > process-1.2.3.0 -XHaskell2010  -no-user-package-db -rtsopts      -odir
> > utils/hsc2hs/dist/build -hidir utils/hsc2hs/dist/build -stubdir
> > utils/hsc2hs/dist/build -dep-makefile
> > utils/hsc2hs/dist/build/.depend.haskell.tmp -dep-suffix ""
> > -include-pkg-deps  utils/hsc2hs/./Main.hs  utils/hsc2hs/./C.hs
> > utils/hsc2hs/./Common.hs  utils/hsc2hs/./CrossCodegen.hs
> > utils/hsc2hs/./DirectCodegen.hs  utils/hsc2hs/./Flags.hs
> > utils/hsc2hs/./HSCParser.hs  utils/hsc2hs/./UtilsCodegen.hs
> > <command line>: package db: duplicate packages with incompatible ABIs:
> >     binary-0.7.5.0 has ABIs: , c28f822c21e75eb270eca0870e42aaac
> >     Cabal-1.23.0.0 has ABIs: , a0a6af8f1dd909f2ee719ddb2cd65779
> >     hpc-0.6.0.2 has ABIs: , 3434375974d4bc6d14952a90ec97d0c4
> >     ghc-boot-0.0.0.0 has ABIs: , f422fc19421064f81c42815f25a11e6e
> >     hoopl-3.10.0.2 has ABIs: , 8968e2731ff8d529c37c048d65e94bf2
> >     transformers-0.4.3.0 has ABIs: , 812457c97c58693d7f8a813b1ba19a33
> >     template-haskell-2.11.0.0 has ABIs: , 0ef51476100e9bdf96d1bf59696b98a1
> >     terminfo-0.4.0.1 has ABIs: , aa24f544c0e3614d419e63fa170ac467
> > 
> > 
> > The only solution I could come up for now is
> > 
> > cd libraries
> > ln -s /home/ggreif/lib/ghc-7.11.20151020/package.conf.d bootstrapping.conf
> > 
> > then resuming 'make' leads to success.
> > 
> > What could this be? Has somebody seen such an error?
> > 
> > Cheers and thanks,
> > 
> >     Gabor