Re: [Haskell-cafe] Re: Resending: MissingH: profiler support?

On 1/12/07, Gregory Wright wrote:

Hi John,

On Jan 11, 2007, at 8:06 PM, John Goerzen wrote:

...

On 2007-01-11, Chris Eidhof wrote:

...

Hey,

does anyone know about this? Resending as I got no replies (yet) ;)

Just for the record, I have no idea; I've never really used profiling and couldn't figure out how to make it work in general (at least not in a short amount of time).

Are you sure your problem is restricted to MissingH? I can't think of anything special about it that would throw off profiling.

-- John

Does MissingH's cabal file have a line

Ghc-Prof-Options: -prof -auto-all

?

The rhs of the option is added to compiler command line when the --enable-library-profiling option is included to configure. Without this, the --enable-library-profiling switch doesn't do anything. (Arguably a bug that cabal silently does nothing instead of reporting an error.)

Cabal will build a profiling version of the library whether or not you have ghc-prof-options. Using '-auto-all' only adds more cost centres which you most likely don't want (unless you're working on the library itself). One might argue, however, that the convenience of having --enable-library-profiling on by default is worth the doubled build time. -- Cheers, Lemmih