Thanks for help. Is there any tool to link all of the separate shared libraries
into one single shared library (libqt5.so) ?
Thanks,
Song
-----Original Message-----
From: Storm-Olsen Marius (Nokia-MP/Austin)
Sent: Monday, July 23, 2012 10:12 PM
To: Liu Song.7 (Nokia-MP/Beijing)
Cc: development@qt-project.org
Subject: Re: [Development] Use static qt libraries
Importance: High
On 23/07/2012 08:56, ext song.7....@nokia.com wrote:
> Hi,
>
> To use the static qt libraries, now I can build out all the
> libQtCore.a , libQtGui.a , libQtWidgets.a etc with option -static.
>
> Also I can create a new shared object libQtMaster.so which is composed
> of all of above static objects (libQtXXX.a),
This would be all wrong.
The only reason for compiling several modules into one would be (of the top of
my head) to
1) Get cross-module optimizations (which indicate also cross-compile-unit
optimizations, so you'll need a bin tools chain which can do that) to a) reduce
code size, and b) improve performance.
2) Reduce number of exported symbols.
3) Faster shared library load time.
To do this you would have to compile each of the modules as normal (shared
library), and then have a step which links all of the object files into one
shared library, maybe called just qt5.so
Configuring as static only to gather them into a shared lib is wrong.
> then I want my Qt application be dynamic linked with this libQtMain.so by:
>
> QT += master
>
> so how to create this new QT module "master" that can be used from the
> .pro files ?
This is also wrong, since this would require everyone to change the way they
create Qt projects. In this case you would want
QT += core gui network
to do the same thing, simply to add linking to this new qt5.so library.
That way you can keep projects working both with and without this magical
single library without further adjustments.
--
.marius
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