debug output

[Simon Peyton Jones]

|  Could the problem be that ghc doesn’t support a -ddebug-output flag?
|  It has -dno-debug-output, but I don’t know of a way to reverse that
|  decision.

Yes, I think that's the problem.  I was surprised -- I thought everything had a negation.

Simon

|  -----Original Message-----
|  From: Richard Eisenberg [mailto:rae at cs.brynmawr.edu]
|  Sent: 24 April 2017 14:29
|  To: Ben Gamari <ben at smart-cactus.org>
|  Cc: Simon Peyton Jones <simonpj at microsoft.com>; ghc-devs <ghc-
|  devs at haskell.org>
|  Subject: Re: debug output
|  
|  Could the problem be that ghc doesn’t support a -ddebug-output flag?
|  It has -dno-debug-output, but I don’t know of a way to reverse that
|  decision.
|  
|  > On Apr 24, 2017, at 9:13 AM, Ben Gamari <ben at smart-cactus.org>
|  wrote:
|  >
|  > Simon Peyton Jones via ghc-devs <ghc-devs at haskell.org> writes:
|  >
|  >> mk/flavours/validate.mk has
|  >>
|  >> GhcStage2HcOpts    = -O -dcore-lint
|  >>
|  >> GhcLibHcOpts       = -O -dcore-lint
|  >> How can I override these in my validate.mk?  E.g.
|  >>
|  >> GhcLibHcOpts      += -ddebug-output
|  >> does not work.
|  >
|  > Are you sure this didn't work You added this line to mk/validate.mk,
|  > yes? Does mk/are-validating.mk exist? This seems to work for me.
|  >
|  > Cheers,
|  >
|  > - Ben
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