[LLVMdev] Old DOUT

Chris Lattner clattner at apple.com
Thu Dec 10 15:53:12 PST 2009

On Dec 10, 2009, at 1:46 PM, David Greene wrote:

> On Thursday 10 December 2009 16:30, Anton Korobeynikov wrote:
>> Hello, David
>>> What replaced the old DOUT?
>> DEBUG(errs() << foo);
>> The reason is quite simple - DOUT in release mode was just /dev/null,
>> but the functions sending data to it were still called.
> errs() is no good.  I would want to keep errs() printing things out 
> immediately.  I need something else that buffers until program termination.
> So I would write the above as:
> DEBUG(dbgs() << foo);
> Does that sound reasonable?

If you're asking if a new dbgs() might be useful, "yes if specified well".  If you're asking if you can convert everything to using it, "no".

> There are some tricky cases where dump routines are used either to
> print error messages or to print debug information.  In those cases
> I may have to parameterize the dump routine with the stream.

What do you mean?


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