RE: HEAD can't find stg_gc_ut

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Solution: delete the out of date .o file.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:[email protected]]
| Sent: 06 December 2012 14:41
| To: Simon Peyton-Jones
| Cc: [email protected]
| 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
| >