stg_upd_frame_info still broken

[Simon Peyton Jones]

I'm sure it's the runtime linker. Static linking is fine.  The symbol is defined in Updates.cmm, and is there in Updates.o, and in ghc-stage2.exe

|  -----Original Message-----
|  From: Ben Gamari [mailto:ben at well-typed.com]
|  Sent: 27 October 2015 14:47
|  To: Simon Peyton Jones; ghc-devs at haskell.org
|  Subject: Re: stg_upd_frame_info still broken
|  
|  Simon Peyton Jones <simonpj at microsoft.com> writes:
|  
|  > Friends
|  > I still cannot build GHC on Windows. On Ben's advice I dumped my
|  > current msys setup and re-installed msys64 as described here
|  > https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Windows
|  
|  I'm sorry to hear that updating msys2 didn't do the trick. I'm still trying
|  to reproduce this in the background. My previous builds were of the ghc-7.10
|  branch so it's possible this regression was introduced into `master`.
|  
|  > I cloned an entirely new GHC repository.
|  > Then 'sh validate'.
|  > Same result as before: any attempt to run GHCi fails with an unresolved
|  symbol.
|  >
|  > bash$ c:/code/HEAD-1/inplace/bin/ghc-stage2 --interactive
|  >
|  > GHCi, version 7.11.20151026: http://www.haskell.org/ghc/  :? for help
|  >
|  > ghc-stage2.exe: unable to load package `ghc-prim-0.4.0.0'
|  >
|  > ghc-stage2.exe: C:\code\HEAD-1\libraries\ghc-prim\dist-
|  install\build\HSghc-prim-0.4.0.0.o: unknown symbol `_stg_upd_frame_info'
|  >
|  > How could I actually find what the problem is? Trying random things
|  > and hoping the problem goes away clearly is not working.
|  >
|  I would first try to find the object file which is supposed to provide this
|  symbol and figure out whether the problem is one of the RTL (which is what I
|  would put my money on) or some part of the build toolchain.
|  
|  Cheers,
|  
|  - Ben