[Haskell-cafe] Compiling a shared library on MacOS X

[Chris Eidhof]

I'm not sure if it is of any help, but at the haskell-wiki there's an article about how to communicate between Haskell and Objective-C using XCode: http://haskell.org/haskellwiki/Using_Haskell_in_an_Xcode_Cocoa_project

-chris

On 4 jan 2010, at 00:36, Ivan Miljenovic wrote:

> If I recall correctly, dynamic linking/shared library support is not
> yet available for OSX, as the Industrial Haskell Group does not have
> any knowledge of OSX (but is willing to pay someone who does to do the
> work).
> 
> 2010/1/4 Jean-Denis Koeck <jdkoeck at gmail.com>:
>> Hello,
>> I'm using the following cabal file to build a shared library with ghc:
>> 
>> Build-Type:            Simple
>> Executable libmylibrary.dll
>>   If os(windows)
>>     CPP-Options:        -DWIN32
>>   Extensions:           ForeignFunctionInterface
>>   Build-Depends:        ...
>>   Main-Is:              libmylibrary.hs
>>   Ghc-Options:          -W --make -no-hs-main -optl-shared -optl-s -O2
>> 
>> The resulting library is called from a C++ graphical user interface (using
>> Qt),
>> which worked great so far on Windows and Linux.
>> 
>> However, the compilation fails on MacOS X:
>> 
>> Undefined symbols:
>>   "_ZCMain_main_closure", referenced from:
>>       _ZCMain_main_closure$non_lazy_ptr in libHSrts.a(Main.o)
>>   "___stginit_ZCMain", referenced from:
>>       ___stginit_ZCMain$non_lazy_ptr in libHSrts.a(Main.o)
>> ld: symbol(s) not found
>> collect2: ld returned 1 exit status
>> 
>> I don't know much about shared libraries, even less about them on MacOS X :(
>> Any idea ?
>> 
>> Jean-Denis Koeck
>> 
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> 
> 
> 
> -- 
> Ivan Lazar Miljenovic
> Ivan.Miljenovic at gmail.com
> IvanMiljenovic.wordpress.com
> Joan Crawford  - "I, Joan Crawford, I believe in the dollar.
> Everything I earn, I spend." -
> http://www.brainyquote.com/quotes/authors/j/joan_crawford.html
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