Re: Rebuilding ghc changes interface hashes?
On 05/04/2011 23:14, Matthias Kilian wrote:
On Tue, Apr 05, 2011 at 08:51:52PM +0100, Simon Marlow wrote:
On Tue, Apr 05, 2011 at 09:59:23PM +0530, Joachim Breitner wrote:
Also, the initial upload was built using ghc-6.12.1, while the upload
now is build with ghc-7.0.2. Given that it is a two-stage compiler, I
assume that the output should be identical, but it seems not to be the
Changing the bootstrapping compiler changes the ABIs. The same can
happen if you interrupt and restart the build.
In general changes can creep in randomly, there's no direct link between
changing the bootstrap compiler and getting different compilation
results (as far as I know), but there are some small elements of
Oh, I confused those two problems again :-( But memories come back,
and IIRC the problem with the bootstrapping compiler is caused by
the "Booter version" (as printed by ghc --info) passed up to the
stage2 compiler. Wasn't the plan (about a year ago) to remove this?
I don't think that is actually causing any problems. It just means that
stage2 claims to have been bootstrapped by whatever you used to build
stage1. Maybe that was intentional (Ian?).
If time permits, I'll send a patch in a few days, but I first have
to follow the switch to git, and I also want to update our (OpenBSDs)
ports to ghc-7.0.3 and hp-2011.2.