One thing you can do to make this less likely to happen is to make sure
the build system can see your .git directory, then it will give your
build a dated version like 7.7.20121206 instead of just 7.7. Then any
packages you install won't clash with older ones. Or alternatively use
cabal-dev to install packages in a sandbox.
Cheers,
Simon
On 06/12/12 15:17, Simon Peyton-Jones wrote:
OK SimonM helped me past this. Just for your info
* The code generator does not actually mention stg_gc_ut; that
is in commented-out code.
* TH was loading HSsyb-0.3.7.o, which was an old .o file created back in
August. I'd just installed syb, but cabal had created libHSsyb-0.3.7.a.
Sadly TH ignored the new .a and took the old .o.
Solution: delete the out of date .o file.
Simon
| -----Original Message-----
| From: Simon Marlow [mailto:marlo...@gmail.com]
| Sent: 06 December 2012 14:41
| To: Simon Peyton-Jones
| Cc: cvs-ghc@haskell.org
| Subject: Re: HEAD can't find stg_gc_ut
|
| It looks like you have an old syb package installed in your .cabal/lib,
| getting rid of that should fix it.
|
| Cheers,
| Simon
|
| On 06/12/12 13:53, Simon Peyton-Jones wrote:
| > Simon, Ian, anyone
| >
| > I'm getting this on today's HEAD:
| >
| > ~/5builds/HEAD/inplace/bin/ghc-stage2 --make T7445.hs -package syb
| >
| > [1 of 2] Compiling T7445a ( T7445a.hs, T7445a.o )
| >
| > [2 of 2] Compiling T7445 ( T7445.hs, T7445.o )
| >
| > Loading package ghc-prim ... linking ... done.
| >
| > Loading package integer-gmp ... linking ... done.
| >
| > Loading package base ... linking ... done.
| >
| > Loading package syb-0.3.7 ... linking ... ghc-stage2:
| > /home/simonpj/.cabal/lib/syb-0.3.7/ghc-7.7/HSsyb-*0.3.7.o: unknown
| > symbol `stg_gc_ut'*
| >
| > ghc-stage2: unable to load package `syb-0.3.7'
| >
| > simonpj@cam-05-unx:~/tmp$
| >
| > Indeed, that symbol is generated in StgCmmHeap (line 631). But it
| > doesn't seem to be defined anywhere in the RTS. Things like stg_gc_pp
| > are defined in Linker.c
| >
| > Any ideas?
| >
| > Simon
| >
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