I think this can definitely be clarified. I'll update the docs a little later today when I get a chance.
On Thu, Sep 12, 2013 at 1:35 PM, Simon Peyton-Jones <simo...@microsoft.com> wrote: > Is this something that could be clarified in GHC's documentation? Patch? > > Simon > > | -----Original Message----- > | From: ghc-devs [mailto:ghc-devs-boun...@haskell.org] On Behalf Of Kazu > | Yamamoto > | Sent: 12 September 2013 04:43 > | To: glasgow-haskell-users@haskell.org; ghc-d...@haskell.org > | Subject: Re: 7.8 Release Update > | > | Hi, > | > | Now I understand what is right and why I misunderstood. > | > | - GHC 7.8 provides three kinds of libraries: > | - static libraries > | - dynamic libraries > | - static libraries for profiling > | - GHCi uses dynamic libraries. > | - Programs complied with GHC 7.8 use static libraries. > | - When a library package is complied, both static one and dynamic > | one are created. > | - When "-p" or "--enabling-executable-profiling" are specified to > | cabal, static libraries for profiling are also created and used. > | > | So, we don't have to specify "--enable-shared"/"--disable-shared" to > | cabal in normal situation. > | > | There is no bug. Just I misunderstood. > | > | * Why did I misunderstand that programs are linked dynamically? > | > | I tried to support GHC 7.8 for doctest. Doctest uses GHCi internally. > | At the beginning, doctest cannot pass many tests if "--enable-shared" > | is not specified. This was fixed: > | > | https://github.com/sol/doctest-haskell/issues/58 > | > | Now, "--enable-shared" is not necessary even for doctest. > | > | * Why did I misunderstand that compiling programs for profiling fails? > | > | I specified --ghc-options="-prof -fprof-auto". "-prof" lets GHC 7.8 > | to produce both static and dynamic libraries for profiling. This > | resulted in build failure. > | > | Right procedure for profiling are: > | > | % cabal install -p --enable-executable-profiling > --ghc-options="-fprof-auto" -j3 > | > | or > | > | % cabal install -p --ghc-options="-fprof-auto" --only-dependencies -j3 > | % cabal configure --enable-executable-profiling > | % cabal build > | > | --Kazu > | > | > On 09/09/13 08:14, Edward Z. Yang wrote: > | >> Excerpts from Kazu Yamamoto (山本和彦)'s message of Sun Sep 08 > | >> 19:36:19 -0700 2013: > | >>> ---- > | >>> % make show VALUE=GhcLibWays > | >>> make -r --no-print-directory -f ghc.mk show > | >>> GhcLibWays="v p dyn" > | >>> ---- > | >> > | >> Yes, it looks like you are missing p_dyn from this list. I think > | >> this is a bug in the build system. When I look at ghc.mk > | >> it only verifies that the p way is present, not p_dyn; and I don't > | >> see any knobs which turn on p_dyn. > | >> > | >> However, I must admit to being a little confused; didn't we abandon > | >> dynamic by default and switch to only using dynamic for GHCi (in which > | >> case the profiling libraries ought not to matter)? > | > > | > I think Kazu is saying that when he builds something with profiling > | > using cabal-install, it fails because cabal-install tries to build a > | > dynamic version too. We don't want dyanmic/profiled libraries > | > (there's no point, you can't load them into GHCi). Perhaps this is > | > something that needs fixing in cabal-install? > | > > | > Cheers, > | > Simon > | > > | _______________________________________________ > | ghc-devs mailing list > | ghc-d...@haskell.org > | http://www.haskell.org/mailman/listinfo/ghc-devs > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users > -- Austin Seipp, Haskell Consultant Well-Typed LLP, http://www.well-typed.com/ _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
