Proto for Boost mailing list page: Re: [proto] Compiling in debug mode

Subject: Re: [proto] Compiling in debug mode
From: Daniel Oberhoff (daniel.oberhoff_at_[hidden])
Date: 2011-05-13 03:46:26

Am Freitag, den 13.05.2011, 09:59 +0700 schrieb Eric Niebler:
> On 5/13/2011 5:45 AM, Bart Janssens wrote:
> > Hi guys,

[..]

> > Is anyone aware of
> > tweaks for GCC that reduce memory usage, but still produce useful
> > debug info (just using -g now, no optimization)?
> 
> I'll leave this for the gcc experts.
> 
> > I've gotten to the point where a compile can use upwards of 1.5GB for
> > a single test, resulting in much swapping, especially when compiling
> > with make -j2 (which I try to remember not to do, now ;).
> 
> Ouch. Do you have to use gcc? Perhaps clang might give you better results.
> 

Maybe, but if you want to keep on using gcc, you can pass it some extra
options that influence its internal memory manager (there is a garbage
collector inside gcc...). These work for me:

--param ggc-min-expand=30 --param ggc-min-heapsize=8192

in effect I think it is a space/speed tradeoff, though I haven't noticed
any major slowdown.

Best

Daniel