#71: GHC panic on cabal install of darcs w/ Platform
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Reporter: anonymous | Owner: dons
Type: defect | Status: new
Priority: blocker | Milestone:
Component: Platform | Resolution:
Keywords: OS X, darcs |
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Changes (by gregorycollins):
* priority: major => blocker
Comment:
GHC is tracking this as http://hackage.haskell.org/trac/ghc/ticket/3275,
I'll cc: this message to the ticket there.
There must be some subtle ABI incompatibility that is triggering
this. Actually, I bet I know what's causing this. Roughly speaking,
here's the sequence of events when I build the installer:
* I install GHC from binary
* I build the libraries in LISTED order (we'll return to this):
{{{
...
regex-base ==0.72.0.2,
regex-compat ==0.71.0.1,
regex-posix ==0.72.0.3,
...
}}}
* Each library gets packaged into a .pkg file which, when installed,
copies the generated libs to the destination and runs "ghc-pkg
register"
So regex-compat gets built against GHC's regex-posix instead of the
platform's, then we build a NEW regex-posix against the platform
libraries and GHC panics when you try to use -compat. The two
regex-posix libraries have the same version number but are installed in
different places and obviously aren't binary-identical, probably some
autogenerated symbol names are different.
The obvious workaround is to build and install the platform libraries in
strict topological order -- could we re-order haskell-platform.cabal so
that each library's dependencies are listed before it? Or could someone
tell me how to do this topological sort using the Cabal library?
Hopefully this message will create an "aha!" moment for someone who
knows the GHC internals better than I do (which is to say, "not at
all").
--
Ticket URL: <http://trac.haskell.org/haskell-platform/ticket/71#comment:2>
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