Multiple C threads -> one unthreaded GHC RTS

Albert Y. C. Lai trebla at
Thu Sep 28 20:57:44 UTC 2017

Suppose I have a C program with multiple C threads calling Haskell 
functions, maybe the same Haskell function too, and the GHC RTS used is 
the unthreaded one. What will go wrong?

I ask because Cabal/cabal-install has recently added building of 
export-to-C shared libraries, i.e., the "foreign-library" section. It 
sees to all the technical details, very nice, I'm very happy about this 
addition, but it chooses the unthreaded GHC RTS.


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