[Haskell-cafe] Re: Creating static libraries using GHC
simonmar at microsoft.com
Wed Jan 18 07:16:45 EST 2006
Tom Hawkins wrote:
> I have a chunk of Haskell code I would like wrap up and distribute as
> a library. Is there a way to build a static library (*.a) that
> includes my code plus the Haskell runtime, which C programs can easily
> link against? Here is what I have tried so far...
> ghc --make -fffi MyLib # Builds MyLib.o and MyLib_stub.o.
> gcc -c -I/usr/local/lib/ghc-6.4.1/include MyLibWrapper.c
> ar -r libMyLib.a MyLib.o MyLib_stub.o MyLibWrapper.o
> This works fine when I use ghc to compile and link a C program...
> ghc main.c libMyLib.a
> But if I use gcc, it throws a lot of unresolved references. I have no
> problem compiling with ghc, but the folks using my library probably
> won't have it installed.
> I added -v to ghc to see how it calls gcc; it seems to link in
> different libraries based on what Haskell libraries are being used,
> and it undefines a bunch is symbol references. Are there any switches
> to have ghc return a single archive with everything included?
No switches, I'm afraid. You'll need to include the complete contents
of libHSrts.a, and whatever packages you're using: probably at least
base and haskell98, i.e. libHSbase.a and libHShasekll98.a respectively.
I don't know if you can include the contents of a .a file directly
when building another .a file, if not you'll need to unpack these
archives and include their contents when building your archive.
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