hsc2hs on Mac

Simon Marlow marlowsd at gmail.com
Mon May 23 13:08:12 CEST 2011

On 17/05/2011 03:10, Kazu Yamamoto (山本和彦) wrote:
> Hello,
>>> Not directly.  hsc2hs calls the C compiler to determine these numbers.
>>> It seems it is calling gcc-4.0 rather than gcc-4.2.  It might be a bug
>>> that it is calling the wrong compiler, but that might just be
>>> misconfiguration in your environment, or in the Haskell Platform.
>>>> gcc-4.0 says sizeof (struct stat) is 108 while gcc-4.2 (default) says
>>>> that is 144.
>> It presumably depends on whether you're using the 32 or 64-bit version
>> of GHC.  Which is it?
> % file /Library/Frameworks/GHC.framework/Versions/7.0.3-i386/usr/lib/ghc-7.0.3/ghc
> /Library/Frameworks/GHC.framework/Versions/7.0.3-i386/usr/lib/ghc-7.0.3/ghc: Mach-O executable i386
> So, it's 32bit. (If 64bit, "file" displays "64bit".)

Ok, you are using GHC 32-bit on a system that normally compiles for 
64-bit by default.  That's fine, and it should work, but you might need 
to be careful when combining code compiled by gcc with code compiled by 
GHC.  In particular, you should use gcc -m32.


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