jeff p wrote:
In case anyone else finds this useful...
My linking problem was finally resolved by using the -fvia-C flag
when compiling with ghc.
Thanks to Stefan O'Rear who pointed out the possibility and wrote:
Does using -fvia-C help at all? The C compiler understands header
files and is sometimes better equipped to resolve things.
If -fvia-C fixes your problem, then your code has a bug, strictly speaking. If
your foreign call requires some information from a header file, then the right
way to call it is by making a small C wrapper function and calling that.
Bear in mind that we'll be deprecating -fvia-C in the future, and also that you
might want your code to work in GHCi too, which doesn't read any header files
when compiling foreign imports.
Cheers,
Simon
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