[Haskell-cafe] Re: Installing Haskell on OSX

[Sudish Joseph]

Hi,

I ran into one problem worth mentioning while recompiling gtk and its
dependencies as universal libraries using macports: the pango port
refused to build with +universal (it fails when trying to merge the
i386 & x86_64 libs).  The pango-devel port does work with one small
tweak as described at https://trac.macports.org/ticket/22801.

Essentially, I had to comment out the "PortGroup muniversal 1.0" line
in the Portfile to get a working universal library for pango.

-Sudish

On Mon, Jun 21, 2010 at 5:09 AM, Giuseppe Luigi Punzi
<glpunzi at lordzealon.com> wrote:
> I died in more dependencies. One, ige-mac-integration. To avoid possible problems I uninstall all ports last night to reinstall full gtk2 with quartz.
>
> For now, i'm solving all of this and I hope to get it working this night.
>
> Sudish Joseph <sudish at gmail.com> wrote:
>
>>Antoine Latter <aslatter at gmail.com> writes:
>>> On Sun, Jun 20, 2010 at 12:53 PM, Giuseppe Luigi Punzi Ruiz
>>> <glpunzi at lordzealon.com> wrote:
>>>> Hi again,
>>>>
>>>> Yes, you are right, but now, "cabal install leksah" I get:
>>>>
>>
>>[...]
>>
>>>> Undefined symbols:
>>>>  "_iconv_close", referenced from:
>>>>      _hs_iconv_close in libHSbase-4.2.0.0.a(iconv.o)
>>>>  "_iconv_open", referenced from:
>>>>      _hs_iconv_open in libHSbase-4.2.0.0.a(iconv.o)
>>>>  "_iconv", referenced from:
>>>>      _hs_iconv in libHSbase-4.2.0.0.a(iconv.o)
>>>> ld: symbol(s) not found
>>
>>> This one is a bummer, and I see it all the time when I try to build a
>>> package linked against macports.
>>
>>This is caused by the two libiconv's in the system being
>>ABI-incompatible, sadly.  The ghc pkg available for download from
>>haskell.org is linked against the system /usr/lib/libiconv.dynlib, which
>>has iconv_open() as a function.  Macports has GNU libiconv which
>>#defines iconv_open to libiconv_open() in /opt/local/include/iconv.h.
>>
>>This then blows up as above when linking against other libraries in
>>macports - the linker pulls in GNU libiconv which lacks the symbols
>>needed as you see above.
>>
>>One workaround is to link GHC itself against the macports version of
>>libiconv (and libgmp) and have cabal-install link all subsequent
>>libraries against macports.  I did just that this weekend and now have a
>>working threadscope using the Quartz backend for gtk2, which is very
>>nice (no need to run the X server).
>>
>>Recipe for reproducing this build is included below (and I can also
>>provide the resulting ghc-6.12.3 pkg file if needed).
>>
>>Another possible option is to use Homebrew to install gtk2 and other
>>dependencies.  Homebrew prefers to use the system-provided libraries and
>>will not pull in GNU libiconv, so this should work with the existing GHC
>>pkg in theory.  I didn't pursue this since the homebrew 'gtk+' package
>>didn't seem to have the option to use Quartz instead of X11 as its
>>backend.
>>
>>Steps for linking the ghc runtime against macports:
>>
>>-  Specify EXTRA_CABAL_CONFIGURE_FLAGS in mk/build.mk as mentioned at
>>   the bottom of http://www.haskell.org/ghc/download_ghc_6_12_3.html
>>
>>   EXTRA_CABAL_CONFIGURE_FLAGS = --extra-include-dirs=/opt/local/include \
>>                                 --extra-lib-dirs=/opt/local/lib
>>
>>-  Use the --with-iconv-* and --with-gmp-* flags when configuring ghc.
>>
>>   ./configure --with-iconv-includes=/opt/local/include \
>>               --with-iconv-libraries=/opt/local/lib \
>>               --with-gmp-includes=/opt/local/include \
>>               --with-gmp-libraries=/opt/local/lib
>>
>>-  This produces a GHC runtime and libraries linked against macports:
>>
>>   % otool -L ghc
>>   ghc:
>>       /opt/local/lib/libncurses.5.dylib (compatibility version 5.0.0, current version 5.0.0)
>>       /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.0)
>>       /opt/local/lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.0.0)
>>       /opt/local/lib/libgmp.10.dylib (compatibility version 11.0.0, current version 11.1.0)
>>
>>   % nm HSbase-4.2.0.2.o | fgrep iconv
>>   001ff7f0 T _hs_iconv
>>   001ff7e0 T _hs_iconv_close
>>   001ff800 T _hs_iconv_open
>>            U _libiconv
>>            U _libiconv_close
>>            U _libiconv_open
>>
>>   ghc and included libraries use the macports libiconv, so linking
>>   against other libraries in macports (gtk2!) will work.
>>
>>-  Have cabal-install use macports as well for packages it installs by
>>   editing ~/.cabal/config and setting:
>>
>>   extra-include-dirs: /opt/local/include
>>   extra-lib-dirs: /opt/local/lib
>>
>>-  This gives, for e.g., threadscope linked against macports:
>>
>>   % otool -L ~/.cabal/bin/threadscope | egrep '(gtk|iconv)'
>>       /opt/local/lib/libgtk-quartz-2.0.0.dylib (compatibility version 2001.0.0, current version 2001.1.0)
>>       /opt/local/lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.0.0)
>>
>>-  Note that since the ghc runtime is still in 32-bit i386 mode, we
>>   need universal versions of most libraries in macports.  Recent
>>   versions of macports (1.9 for sure, maybe 1.8) make it simple to
>>   switch from an x86_64 library to a universal one:
>>
>>   % port install gtk2 +universal
>>
>>   This will recompile gtk2 and *all* dependent libraries as universal
>>   libraries which is exactly what you need.  You can then eliminate any
>>   inactive 64-bit libraries with:
>>
>>   % port -f uninstall inactive
>>
>>> Here's the last thread about with, with more links and discussion:
>>>
>>> http://thread.gmane.org/gmane.comp.lang.haskell.general/18064/
>>>
>>> The response by Jean-Marie Gaillourdet has worked for me in the past.
>>>
>>> Antoine
>>
>>Thanks for that link, I didn't think of overriding libiconv on a
>>per-package basis.
>>
>>-Sudish
>