On 2 nov 2009, at 03:30, Manuel M T Chakravarty wrote:
Chris Eidhof:
I'm trying to call a Haskell function from C, on OS X. There's an excellent post [1] by Tomáš Janoušek that explains how to do this on Linux. However, on OS X, it's different. First of all, it looks like the -no-hs-main flag is ignored, because I get the following error:
ghc -O2 --make -no-hs-main -optl '-shared' -optc '- DMODULE=Test' -o Test.so Test.hs module_init.c [1 of 1] Compiling Main ( Test.hs, Test.o )
Test.hs:1:0: The function `main' is not defined in module `Main'''
The flag -no-hs-main is a link-time flag that allows you to link without a main function, but you are getting a compile time error. It's as if you try to export main, but don't define it.
Have you had a look at http://www.haskell.org/ghc/docs/latest/html/users_guide/ffi-ghc.html#foreign... ?
Interesting! I didn't see that section before, thanks a lot. -chris