[Qt-interest] Qt 4.5.1 Windows GROWS 4Gb+

[Rohan McGovern]

On Monday 25 May 2009, ext Andreas Pakulat wrote:
> On 24.05.09 09:02:02, Miguel Cardenas wrote:
> > Hi
> >
> > Well, finally decided to make a single windows partition with
> > the whole disk to compile Qt 4.5.1. I did
> >
> > configure.exe -release -qt-gif -phonon -phonon-backend
> >
> > (the same as in Linux) and the result was a 7.5Gb directory
> > tree. Backed it up and deleted 'demos', 'examples' and 'doc',
> > but the tree is still over 4Gb.
> >
> > Why 4.5.1 is too large? 4.4.3 is ~1Gb only with the exact same
> > configure options, computer and compiler. Will the applications
> > be so large too?
>
> Because apparently QtSoftware changed the default compiler
> options between those releases. In particular they enabled a MSVC
> option which produces improvements during runtime of the library,
> but needs lots and lots of space during compilation for the
> object files. So if you want to decrease the disk-usage then just
> remove all the .obj files from your buildtree.
>

If you refer to the /LTCG (link time code generation) option... it 
has recently been turned back _off_ due to problems like this.  In 
Qt 4.5.2 it will be off by default.

-- 
Rohan McGovern
Qt Software, Nokia