[Haskell-cafe] Re: Installing Haskell on OSX

Giuseppe Luigi Punzi glpunzi at lordzealon.com
Mon Jun 21 05:09:20 EDT 2010

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-
>>>  "_iconv_open", referenced from:
>>>      _hs_iconv_open in libHSbase-
>>>  "_iconv", referenced from:
>>>      _hs_iconv in libHSbase-
>>> 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
>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- | 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.

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