Bug#742149: mapnik: FTBFS on mipsen (virtual memory exhausted)

[Jérémy Lal]

> On 03/19/2014 09:28 PM, Aurelien Jarno wrote:
> > On Wed, Mar 19, 2014 at 09:18:20PM +0100, Sebastiaan Couwenberg wrote:
> I'm not sure what the best course of action is. But Jérémy suggested
> backporting a change from upstream, I'll give that a go tomorrow:
> 
> https://github.com/mapnik/mapnik/pull/2134

I've backported that patch and it seems it saves some memory.
Also i discovered hundreds of megabytes of memory usage can be saved by
disabling debugging symbols (-g0).

(Not uploading the fix yet because i'd like scons to not build twice,
once at build, once again at install target.)

Jérémy.