Can't build 8.6.1-beta1 with debugging.

[Mateusz Kowalczyk]

Hi,

I was able to get GHC to compile with the patch in your ticket.

Thanks!

--
Mateusz K.

On Tue, 14 Aug 2018, at 9:08 AM, Ömer Sinan Ağacan wrote:
> Hi Mateusz,
> 
> > /usr/bin/ld.gold: error: cannot find -lHSrts_thr_debug_p
> 
> We currently don't ship GHC with profiling + debug + threaded runtime. See my
> previous email on this:
> https://mail.haskell.org/pipermail/ghc-devs/2018-July/015982.html
> 
> I show a way to enable these runtimes in
> https://ghc.haskell.org/trac/ghc/ticket/15508
> 
> Hope this helps,
> 
> Ömer
> 
> Mateusz Kowalczyk <fuuzetsu at fuuzetsu.co.uk>, 14 Ağu 2018 Sal, 09:19
> tarihinde şunu yazdı:
> >
> > Hi all,
> >
> > I wanted to try our codebase with 8.6. I happened to already have 8.6.0.20180714 ready so I started with that.
> >
> > Compilation went well but I got a segfault when running a benchmark we have with profiling on. GDB told me the segfault was in stg_ap_ppppp_info in AutoApply.cmm which as I understand is generated. Strange but OK... I decided to try unprofiled with LLVM to see if some LLVM issue we had with current version (7.10.x) has gone away. Sadly I encountered a segfault during regular compilation (clean build, LLVM 6.0). I had no debugging symbols.
> >
> > Next I decided to try the beta1 version. I copied mk/build.mk.sample into mk/build.mk and added the following:
> >
> > GhcDebugged = YES
> > GhcStage1HcOpts = -DDEBUG
> > GhcStage2HcOpts = -DDEBUG
> >
> > I checked out the 8.6.1-beta1 tag then ran following.
> >
> > fuuzetsu at rubin:~/programming/ghc$ echo $PREFIX
> > /usr/local/ghc/ghc-8.6.1-beta1
> > fuuzetsu at rubin:~/programming/ghc$ ./configure --prefix=$PREFIX && make -j4 && make install
> >
> > After some time I was met with:
> >
> > /usr/bin/ld.gold: error: cannot find -lHSrts_thr_debug_p
> >
> > Also a long chain of messages about undefined refs you can find at [1].
> >
> > Considering I haven't touched any settings beyond adding debug flags, it surprised me a little that I can't build successfully. Please advise and feel free to ask for any specs.
> >
> > uname -a:
> > Linux rubin.tsuru.it 4.15.0-30-generic #32~16.04.1-Ubuntu SMP Thu Jul 26 20:25:39 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
> >
> >
> > [1]: https://gist.github.com/Fuuzetsu/7a65a963dd625386d13938ba1e22af5c
> >
> > --
> > Mateusz K.
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