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I have a patch from Arthur Baars to build profiling libraries for GHC. I'm wondering how people think it should be integrated? Should we have a --prof option that JUST builds profiling libraries, or which builds both non profiling and profiling?

--with-prof sounds good, which would build (and install etc.) the prof way in addition to the normal way.

I agree.

In the future we might need more of these (eg. --with-smp), but since each one needs a different flag to GHC I don't think there's anything more general we can reasonably do.

I can envisage --with-tracing too, to build a Hat-enabled version of a package, which involves not only extra compiler flags but extra pre-processor and library dependencies too. In general, do you think these flags should combine in a linear fashion (one of each 'way') or cross-product (all possible permutations)? Regards, Malcolm