ghc-7.10.1-rc1 build GC log messages

Sergei Trofimovich slyich at
Thu Dec 25 11:15:14 UTC 2014

On Wed, 24 Dec 2014 20:27:27 +0100
Tuncer Ayaz <tuncer.ayaz at> wrote:

> Building ghc-7.10.1-rc1, I see the following new messages:
> HC [stage 1] compiler/stage2/build/Dwarf.p_o
> <<ghc: 607994600 bytes, 145 GCs, 14478288/51516200 avg/max bytes
> residency (8 samples), 103M in use, 0.00 INIT (0.00 elapsed), 0.88 MUT
> (1.10 elapsed), 0.76 GC (0.77 elapsed) :ghc>>
> Is this a debug log or normal from now on during a ghc build?
> I don't mind, but I just wanted to make sure it's not a mistakenly
> enabled debug flag somewhere.

It is a normal flag and was present long ago on build system:
but happened to break a couple of releases ago.
Was fixed in

You can disable it by putting
in mk/


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