Ketil Malde wrote:
Now you see it, now you don't. :-/
* .a files in /local/lib/foo-0.0/ghc-xxxx/ -- check * .a files named libfoo.a -- check * -lfoo on the command line -- check
Using strace shows that the .a file is indeed being read by ghc, but I still get "undefined reference".
No idea, I'm afraid. ghc -v might help you. Try cut-and-pasting the linker command line and play around with ordering of -l options. As a matter of style, rather than using -lfoo on the command line you should use the extra-libraries field in the .cabal file.
Apologies for being dense, but I can't seem to make it work at all. Is there a cabalized library that does this (links to a .a type C library) that I can look at?
Some of the standard packages do this, eg. http://darcs.haskell.org/package/network comes with a small amount of C code. GHC doesn't currently use Cabal to build this, though. I'm sure there are other Cabal packages out there that link to .a libraries, it's quite a common thing to do. Cheers, Simon