RE: (not) catching ^C in ghc-built application

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For a quick workaround, if you install your own handler *after* calling startupHaskell(), you should be able to override GHC's.

The thing is, that's what I'm already doing. At least, Haskell is in charge of the execution, and does quite a lot of things before calling out to an I/O action written in C, which then sets the handler.

My best guess is that the use of signal() is incompatible with the POSIX sigaction() used by the RTS.

That's possible I guess. Could you try using sigaction() instead? Cheers, Simon