I think part of what Ian is saying is that the default config for a Perf build for HEAD will build the dylib versions of all the libraries. Or am I not understanding the question?

eg: see the default make fileĀ https://github.com/ghc/ghc/blob/master/mk/build.mk.sample#L55-L75


On Mon, Dec 23, 2013 at 12:59 PM, Ben Gamari <bgamari.foss@gmail.com> wrote:
Ian Lynagh <igloo@earth.li> writes:

> You shouldn't need dynamic-by-default. It should Just Work in HEAD, both
> unregisterised and registerised.
>
Just to clarify, how does one configure GHCi to use dynamic linking now?
Should I interpret your message to mean that it is already configured
this way? Where in the tree is this configured?

To be perfectly clear, I want to ensure that dynamic linking is always
preferred over linking static objects with the RTS linker. Will this
happen as things stand? How does GHCi decide how to load a library? Is
this the role of GhcDynamic?

I'm still not really sure why `DYNAMIC_BY_DEFAULT` should be causing the
problems I'm observing. It seems to me that it is functionally equivalent
to passing the `-dynamic` flag as they both simply add `WayDyn` to DynFlag's
`ways` list. Do you have any idea where they might differ?

Cheers,

- Ben


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