[Haskell-cafe] Shared library creating on Mac OS X

[Phil]

I¹ve made a bit of progress here after reading up on Darwin¹s GCC a bit
more:

ghc --make -no-hs-main -fPIC -optl '-dynamiclib' -optl '-undefined' -optl
'suppress' -optl '-flat_namespace'  -o Inv.dylib InverseNormal.hs

This dies when it links against haskell¹s own libraries, my guess is because
they are position dependant.  So the only way I see forward would be to
recompile haskell with ³­fPIC².

This seems like a lot of hassle, so I¹m shelving this for now ­ if anyone
has any other (less distruptive) ways to proceed give me a shout ­ even if
it means linking statically.

Cheers,

Phil.

Linker error now is:


ld: warning codegen with reference kind 13 in _stg_CAF_BLACKHOLE_info
prevents image from loading in dyld shared cache
ld: absolute addressing (perhaps -mdynamic-no-pic) used in
___stginit_haskell98_Array_ from
/usr/local/ghc/6.10.1/lib/ghc-6.10.1/haskell98-1.0.1.0/libHShaskell98-1.0.1.
0.a(Array__1.o) not allowed in slidable image
collect2: ld returned 1 exit status






On 10/01/2009 02:26, "Phil" <pbeadling at mail2web.com> wrote:

> Hi,
> 
> I¹m hitting a problem trying create shared haskell libs to be linked into a C
> program on Mac OS X.
> 
> I¹m using the latest download for Leopard from the GHC page:
> http://www.haskell.org/ghc/dist/6.10.1/witten/ghc-6.10.1-powerpc-apple-darwin.
> tar.bz2
> 
> I can get basic executables working fine (with a C main() #including ghc¹s
> stub header), using something like:
> ghc -optc-O invnorm.c InverseNormal.o InverseNormal_stub.o -o cTest
> 
> I started off using the following line to try to create a shared lib:
> 
>  ghc --make -no-hs-main -optl '-shared' -o Inv.so InverseNormal.hs
> 
> This doesn¹t work on mac os x because Apple¹s gcc annoyingly takes different
> switches, so I changed it to:
> 
> ghc --make -no-hs-main -optl '-dynamiclib' -o Inv.dylib InverseNormal.hs
> 
> Which still fails at the final link giving:
> 
> Linking Inv.dylib ...
> Undefined symbols:
>   "_environ", referenced from:
>       _environ$non_lazy_ptr in libHSbase-4.0.0.0.a(PrelIOUtils.o)
> ld: symbol(s) not found
> 
> I¹ve seen similar things before, and I believe if you have full control over
> the source you just slip in a:
> 
> #define environ (*_NSGetEnviron())
> 
> Sure enough, I can find references to environ in, for example HsBase.h
> 
> Problem (as I see it) is that references to environ are already wrapped up in
> the static lib libHSbase-4.0.0.0.a, so without recompiling Haskell we can¹t
> alter the C definition now.  However, given that packager must have made this
> behave when he compiled the distribution there must be a way to make Mac gcc
> accept _envrion symbols??
> 
> Has anyone seen this before / can confirm my analysis / and by any chance have
> a solution?
> 
> Many thanks,
> 
> Phil.
> 
> _______________________________________________
> Haskell-Cafe mailing list
> Haskell-Cafe at haskell.org
> http://www.haskell.org/mailman/listinfo/haskell-cafe

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.haskell.org/pipermail/haskell-cafe/attachments/20090110/7e94a36c/attachment.htm