Hi,

due to some other topic discussed on the mailing list, I thought I'd check the dependencies of a simple lazarus project. The result is shown below.

I did this similar exercise a year or two ago, and the result has more than tripled !

I wonder, why all these dependencies ??
I mean, libselinux, libcairo, libexpat, libdirectfb, libfusion, libdirect (to name but a few), why do I need those ?

Besides making it more difficult to run a binary on another PC, I hate to think what this does to the startup time of a binary.

At some time, the KDE project tried to reduce startup time of their binaries by redefining their APIs so shared libs would load faster.

Looking at the below list, I think it is high time that Lazarus does the same. If this means that some GTK import units must be split up in pieces, then I'll be glad to take this task on me.

Michael.

Simple Lazarus app (GTK2) dependencies:

linux-vdso.so.1 => (0x00007fff6b231000)
libpthread.so.0 => /lib/libpthread.so.0 (0x00007fed28a87000) libdl.so.2 => /lib/libdl.so.2 (0x00007fed28883000) libX11.so.6 => /usr/lib/libX11.so.6 (0x00007fed2854c000) libgdk_pixbuf-2.0.so.0 => /usr/lib/libgdk_pixbuf-2.0.so.0 (0x00007fed28330000) libgtk-x11-2.0.so.0 => /usr/lib/libgtk-x11-2.0.so.0 (0x00007fed27d0e000) libgdk-x11-2.0.so.0 => /usr/lib/libgdk-x11-2.0.so.0 (0x00007fed27a60000) libgobject-2.0.so.0 => /usr/lib/libgobject-2.0.so.0 (0x00007fed27818000) libglib-2.0.so.0 => /lib/libglib-2.0.so.0 (0x00007fed2753a000) libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x00007fed27334000) libgmodule-2.0.so.0 => /usr/lib/libgmodule-2.0.so.0 (0x00007fed27130000) libpango-1.0.so.0 => /usr/lib/libpango-1.0.so.0 (0x00007fed26ee6000) libatk-1.0.so.0 => /usr/lib/libatk-1.0.so.0 (0x00007fed26cc4000) libcairo.so.2 => /usr/lib/libcairo.so.2 (0x00007fed26a41000) libc.so.6 => /lib/libc.so.6 (0x00007fed266be000)
/lib64/ld-linux-x86-64.so.2 (0x00007fed28cc8000)
libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007fed264a1000) libgio-2.0.so.0 => /usr/lib/libgio-2.0.so.0 (0x00007fed261ee000) librt.so.1 => /lib/librt.so.1 (0x00007fed25fe6000) libm.so.6 => /lib/libm.so.6 (0x00007fed25d62000)
libXext.so.6 => /usr/lib/libXext.so.6 (0x00007fed25b50000) libXrender.so.1 => /usr/lib/libXrender.so.1 (0x00007fed25946000) libXinerama.so.1 => /usr/lib/libXinerama.so.1 (0x00007fed25742000) libXi.so.6 => /usr/lib/libXi.so.6 (0x00007fed25532000) libXrandr.so.2 => /usr/lib/libXrandr.so.2 (0x00007fed25329000) libXcursor.so.1 => /usr/lib/libXcursor.so.1 (0x00007fed2511e000) libpangocairo-1.0.so.0 => /usr/lib/libpangocairo-1.0.so.0 (0x00007fed24f11000) libXcomposite.so.1 => /usr/lib/libXcomposite.so.1 (0x00007fed24d0e000) libXdamage.so.1 => /usr/lib/libXdamage.so.1 (0x00007fed24b0a000) libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0x00007fed24904000) libpangoft2-1.0.so.0 => /usr/lib/libpangoft2-1.0.so.0 (0x00007fed246da000) libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00007fed24453000) libz.so.1 => /lib/libz.so.1 (0x00007fed2423c000)
libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00007fed24007000) libpcre.so.3 => /lib/libpcre.so.3 (0x00007fed23dd8000) libpixman-1.so.0 => /usr/lib/libpixman-1.so.0 (0x00007fed23b7f000) libdirectfb-1.2.so.0 => /usr/lib/libdirectfb-1.2.so.0 (0x00007fed238fb000) libfusion-1.2.so.0 => /usr/lib/libfusion-1.2.so.0 (0x00007fed236f1000) libdirect-1.2.so.0 => /usr/lib/libdirect-1.2.so.0 (0x00007fed234d8000) libpng12.so.0 => /lib/libpng12.so.0 (0x00007fed232b0000) libxcb-render-util.so.0 => /usr/lib/libxcb-render-util.so.0 (0x00007fed230ac000) libxcb-render.so.0 => /usr/lib/libxcb-render.so.0 (0x00007fed22ea3000) libXau.so.6 => /usr/lib/libXau.so.6 (0x00007fed22c9e000) libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007fed22a98000) libresolv.so.2 => /lib/libresolv.so.2 (0x00007fed2287f000) libselinux.so.1 => /lib/libselinux.so.1 (0x00007fed22660000) libexpat.so.1 => /lib/libexpat.so.1 (0x00007fed22437000)

You don't but gtk does (or cairo or some xlib).

These are used by the gtk2 libs and vary by system. For example on ubuntu 64bit there is no libfusion, libdirectfb, libdirect.

You can check yourself:
ldd /usr/lib/libgtk-x11-2.0.so.0

So, any gtk2 program uses them.

Besides making it more difficult to run a binary on another PC, I hate to think what this does to the startup time of a binary.

If there is already another gtk program running the libs are already loaded.

If you find one that can be omitted please tell.

Mattias

I'll comment on libraries that might not be clear:

These three are needed by GTK. Pango is (basically) the "font backend", Cairo is the drawing backend while ATK is needed to provide accessibility features

Pango uses Cairo as a backend as well.

Pango uses FreeType to retrieve font informations (see next library).

libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00007fed24453000) libz.so.1 => /lib/libz.so.1 (0x00007fed2423c000) libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00007fed24007000)

This is needed to look for fonts installed in the system.

libpcre.so.3 => /lib/libpcre.so.3 (0x00007fed23dd8000)

Needed by glib2.

libpixman-1.so.0 => /usr/lib/libpixman-1.so.0 (0x00007fed23b7f000)

Lowlevel graphic operations, needed by cairo (can be compiled statically as well)

libdirectfb-1.2.so.0 => /usr/lib/libdirectfb-1.2.so.0 (0x00007fed238fb000)

Seems that direct FrameBuffer rendering was enabled for GTK or Cairo... so normally not needed.

libfusion-1.2.so.0 => /usr/lib/libfusion-1.2.so.0 (0x00007fed236f1000) libdirect-1.2.so.0 => /usr/lib/libdirect-1.2.so.0 (0x00007fed234d8000)

I don't know about these two.

libpng12.so.0 => /lib/libpng12.so.0 (0x00007fed232b0000)

This is needed by Cairo.

I don't know why this one is in there

libexpat.so.1 => /lib/libexpat.so.1 (0x00007fed22437000)

This is a XML library and used by fontconfig.

Regards,
Sven

Hm. I did a quick check:

fsb: >ldd /usr/lib/libgdk-x11-2.0.so.0 | wc -l
44
fsb: >ldd /usr/lib/libqt-mt.so.3.3.8 | wc -l
31

So Qt needs 31 libs, GTK uses 44. Many of the extra ones related to direct framebuffer access, which is total nonsense in a X environment.

Well, this reminds me why I use KDE and not Gnome.

How complete/stable is the Qt version of the LCL, and what version of Qt is needed ?

Michael.

The gnome projects likes to split libs in smaller modules. The number of libs is not that important. The size is more important:

A gtk2 program:
ldd testgtk2 | cut -d' ' -f 3 | grep lib | xargs cat | wc -c 14932491

A qt program:
ldd testqt | cut -d' ' -f 3 | grep lib | xargs cat | wc -c 53583219

So Qt uses about 50MB, GTK uses 15MB.

Well, this reminds me why I use KDE and not Gnome. How complete/stable is the Qt version of the LCL, and what version of Qt is needed ?

It is quite stable. It works well under KDE, not so well under Gnome. But this is not the fault of the LCL qt interface, but of QT.

Mattias

This is lazarus qtlcl dependency:

[linda at houston ~]$ ldd /usr/lib/lazarus/lazarus linux-gate.so.1 => (0x004fe000)
libpthread.so.0 => /lib/libpthread.so.0 (0x0032c000) libdl.so.2 => /lib/libdl.so.2 (0x00325000)
libQt4Pas.so.5 => /usr/lib/libQt4Pas.so.5 (0x06b8b000) libX11.so.6 => /usr/lib/libX11.so.6 (0x0016b000)
librt.so.1 => /lib/librt.so.1 (0x0037f000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x03435000)
libz.so.1 => /lib/libz.so.1 (0x00368000)
libc.so.6 => /lib/libc.so.6 (0x004ff000)
/lib/ld-linux.so.2 (0x0014c000)
libQtWebKit.so.4 => /usr/lib/libQtWebKit.so.4 (0x42159000) libQtGui.so.4 => /usr/lib/libQtGui.so.4 (0x02486000) libQtNetwork.so.4 => /usr/lib/libQtNetwork.so.4 (0x07447000) libQtCore.so.4 => /usr/lib/libQtCore.so.4 (0x06e61000) libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00856000) libm.so.6 => /lib/libm.so.6 (0x002f9000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00349000)
libxcb.so.1 => /usr/lib/libxcb.so.1 (0x004bb000)
libfreebl3.so => /lib/libfreebl3.so (0x034be000)
libXrender.so.1 => /usr/lib/libXrender.so.1 (0x007d5000) libsqlite3.so.0 => /usr/lib/libsqlite3.so.0 (0x037eb000) libphonon.so.4 => /usr/lib/libphonon.so.4 (0x07777000) libpulse-mainloop-glib.so.0 => /usr/lib/libpulse-mainloop-glib.so.0 (0x00df3000)
libpulse.so.0 => /usr/lib/libpulse.so.0 (0x0772e000) libglib-2.0.so.0 => /lib/libglib-2.0.so.0 (0x00689000) libQtDBus.so.4 => /usr/lib/libQtDBus.so.4 (0x00d33000) libQtXml.so.4 => /usr/lib/libQtXml.so.4 (0x07404000) libXi.so.6 => /usr/lib/libXi.so.6 (0x00110000)
libXrandr.so.2 => /usr/lib/libXrandr.so.2 (0x007ec000) libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0x0084f000) libXcursor.so.1 => /usr/lib/libXcursor.so.1 (0x00843000) libXinerama.so.1 => /usr/lib/libXinerama.so.1 (0x007e7000) libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x002b1000) libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x003f0000) libXext.so.6 => /usr/lib/libXext.so.6 (0x00120000) libgthread-2.0.so.0 => /lib/libgthread-2.0.so.0 (0x00131000) libpng12.so.0 => /usr/lib/libpng12.so.0 (0x00388000) libgobject-2.0.so.0 => /lib/libgobject-2.0.so.0 (0x00945000) libSM.so.6 => /usr/lib/libSM.so.6 (0x00137000)
libICE.so.6 => /usr/lib/libICE.so.6 (0x003b0000)
libssl.so.10 => /usr/lib/libssl.so.10 (0x00c90000) libcrypto.so.10 => /lib/libcrypto.so.10 (0x009e6000) libXau.so.6 => /usr/lib/libXau.so.6 (0x004db000)
libpulsecommon-0.9.21.so => /usr/lib/libpulsecommon-0.9.21.so (0x07562000)
libXtst.so.6 => /usr/lib/libXtst.so.6 (0x00d13000) libwrap.so.0 => /lib/libwrap.so.0 (0x02fb0000)
libsndfile.so.1 => /usr/lib/libsndfile.so.1 (0x03907000) libasyncns.so.0 => /usr/lib/libasyncns.so.0 (0x02fa8000) libdbus-1.so.3 => /lib/libdbus-1.so.3 (0x007f6000) libexpat.so.1 => /lib/libexpat.so.1 (0x00486000)
libuuid.so.1 => /lib/libuuid.so.1 (0x007e0000)
libgssapi_krb5.so.2 => /lib/libgssapi_krb5.so.2 (0x00c2d000) libkrb5.so.3 => /lib/libkrb5.so.3 (0x075b9000)
libcom_err.so.2 => /lib/libcom_err.so.2 (0x00141000) libk5crypto.so.3 => /lib/libk5crypto.so.3 (0x00c67000) libresolv.so.2 => /lib/libresolv.so.2 (0x004de000) libnsl.so.1 => /lib/libnsl.so.1 (0x02f8b000)
libFLAC.so.8 => /usr/lib/libFLAC.so.8 (0x03979000) libvorbisenc.so.2 => /usr/lib/libvorbisenc.so.2 (0x039b8000) libvorbis.so.0 => /usr/lib/libvorbis.so.0 (0x0348a000) libogg.so.0 => /usr/lib/libogg.so.0 (0x034b6000)
libkrb5support.so.0 => /lib/libkrb5support.so.0 (0x002a2000) libkeyutils.so.1 => /lib/libkeyutils.so.1 (0x00d2e000) libselinux.so.1 => /lib/libselinux.so.1 (0x00797000)

It's pretty complete and stable, we are using it for our production. Gtk2 does not have chance with our needs.AFAIK you already seen our erp app at lazarus day last summer, it's qtlcl app :)
Minimum required qt version is 4.5.0, but if you use old KDE installations, probably you have to build it by yourself. If you want I can send you rpms maded for older distros (Qt-4.6.4).

zeljko

Mattias Gaertner wrote

It is quite stable. It works well under KDE, not so well under Gnome. But this is not the fault of the LCL qt interface, but of QT.

What's "not so well" under Gnome ? I guess that you have problem with metacity behaviour (or maybe with compiz, but gtk2 also have big trouble with it). Here it works ok under KDE, Xfce, WindowMaker,IceWM.

zeljko

I get quite a different count:

fsb: >ldd /usr/lib/libqt-mt.so.3.3.8 | cut -d' ' -f 3 | xargs cat | wc -c 7172681
fsb: >ldd /usr/lib/libgdk-x11-2.0.so.0 | cut -d' ' -f 3 | xargs cat | wc -c 9804745

7 vs. 9 Mb. Just for the Qt/Gtk library.

And that only size matters is not quite correct: for each library the number of symbols in the libraries must be resolved.
The more libraries must be resolved, the more work there is for the linker.

That was the main issue in KDE: to reduce the number of symbols to be resolved. This meant, less libraries.

Michael.

In our previous episode, Michael Van Canneyt said:

At some time, the KDE project tried to reduce startup time of their binaries by redefining their APIs so shared libs would load faster.

I thought the KDE problem was that their shared libs interfaced at the C++ level, exporting huge amounts of symbols per lib?

(something that we would get too with packages btw)

But libgdk does not contain all dependencies that a GTK application needs (can't comment on QT though).

Regards,
Sven

Indeed. for GTK, the problem is bigger:

fsb: >ldd /usr/lib/libgtk-x11-2.0.so.0 | cut -d' ' -f 3 | xargs cat | wc -c 10646417

It needs 10Mb, more than the Qt lib.

And I checked: the LCL app loads exactly the same list of libraries as the GTK lib itself. I don't have an LCL Qt app to compare with.

Michael.

You forgot to count libgtk-x11-2.0.so
ldd on gtk-x11 does not count gtk-x11 itself

Another difference for me was:

libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0xb7004000)

It needs 10Mb, more than the Qt lib.

No way, why do you think that /usr/lib/libqt-mt uses all Qt libs? In fact it uses *zero* other Qt libs =D

Here is what an LCL-Qt app uses:

[felipe at localhost httpclient]$ ldd readhttpheaders linux-gate.so.1 => (0xffffe000)
libQt4Pas.so.5 => /usr/lib/libQt4Pas.so.5 (0xb7602000) libX11.so.6 => /usr/lib/libX11.so.6 (0xb74d0000)
libdl.so.2 => /lib/libdl.so.2 (0xb74cc000)
libc.so.6 => /lib/i686/libc.so.6 (0xb737a000)
libQtWebKit.so.4 => /usr/lib/libQtWebKit.so.4 (0xb630b000) libQtGui.so.4 => /usr/lib/libQtGui.so.4 (0xb5880000) libQtNetwork.so.4 => /usr/lib/libQtNetwork.so.4 (0xb5759000) libQtCore.so.4 => /usr/lib/libQtCore.so.4 (0xb54d8000) libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb53e7000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb53c9000)
libxcb.so.1 => /usr/lib/libxcb.so.1 (0xb53a9000)
/lib/ld-linux.so.2 (0xb7829000)
libsqlite3.so.0 => /usr/lib/libsqlite3.so.0 (0xb5305000) libphonon.so.4 => /usr/lib/libphonon.so.4 (0xb52a8000) libQtXmlPatterns.so.4 => /usr/lib/libQtXmlPatterns.so.4 (0xb4e8e000) libpthread.so.0 => /lib/i686/libpthread.so.0 (0xb4e76000) libXrender.so.1 => /usr/lib/libXrender.so.1 (0xb4e6b000) libm.so.6 => /lib/i686/libm.so.6 (0xb4e45000)
libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0xb4d6b000) libpng12.so.0 => /usr/lib/libpng12.so.0 (0xb4d24000) libz.so.1 => /lib/libz.so.1 (0xb4d11000)

Sorry, the list was incomplete. My KDE console has a wierd bug when selecting text =(

[felipe at localhost httpclient]$ ldd readhttpheaders linux-gate.so.1 => (0xffffe000)
libQt4Pas.so.5 => /usr/lib/libQt4Pas.so.5 (0xb7602000) libX11.so.6 => /usr/lib/libX11.so.6 (0xb74d0000)
libdl.so.2 => /lib/libdl.so.2 (0xb74cc000)
libc.so.6 => /lib/i686/libc.so.6 (0xb737a000)
libQtWebKit.so.4 => /usr/lib/libQtWebKit.so.4 (0xb630b000) libQtGui.so.4 => /usr/lib/libQtGui.so.4 (0xb5880000) libQtNetwork.so.4 => /usr/lib/libQtNetwork.so.4 (0xb5759000) libQtCore.so.4 => /usr/lib/libQtCore.so.4 (0xb54d8000) libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb53e7000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb53c9000)
libxcb.so.1 => /usr/lib/libxcb.so.1 (0xb53a9000)
/lib/ld-linux.so.2 (0xb7829000)
libsqlite3.so.0 => /usr/lib/libsqlite3.so.0 (0xb5305000) libphonon.so.4 => /usr/lib/libphonon.so.4 (0xb52a8000) libQtXmlPatterns.so.4 => /usr/lib/libQtXmlPatterns.so.4 (0xb4e8e000) libpthread.so.0 => /lib/i686/libpthread.so.0 (0xb4e76000) libXrender.so.1 => /usr/lib/libXrender.so.1 (0xb4e6b000) libm.so.6 => /lib/i686/libm.so.6 (0xb4e45000)
libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0xb4d6b000) libpng12.so.0 => /usr/lib/libpng12.so.0 (0xb4d24000) libz.so.1 => /lib/libz.so.1 (0xb4d11000)
libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb4c8c000) libgobject-2.0.so.0 => /usr/lib/libgobject-2.0.so.0 (0xb4c48000) libSM.so.6 => /usr/lib/libSM.so.6 (0xb4c3e000)
libICE.so.6 => /usr/lib/libICE.so.6 (0xb4c24000)
libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0xb4bf0000) libXext.so.6 => /usr/lib/libXext.so.6 (0xb4bdd000) libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0xb4bd7000) librt.so.1 => /lib/i686/librt.so.1 (0xb4bce000)
libXau.so.6 => /usr/lib/libXau.so.6 (0xb4bca000)
libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb4bc3000) libpulse.so.0 => /usr/lib/libpulse.so.0 (0xb4b7d000) libpulse-mainloop-glib.so.0 =>
/usr/lib/libpulse-mainloop-glib.so.0 (0xb4b76000)
libQtDBus.so.4 => /usr/lib/libQtDBus.so.4 (0xb4afc000) libpcre.so.0 => /lib/libpcre.so.0 (0xb4ac9000)
libxml2.so.2 => /usr/lib/libxml2.so.2 (0xb4988000) libpulsecommon-0.9.21.so => /usr/lib/libpulsecommon-0.9.21.so (0xb4934000)
libX11-xcb.so.1 => /usr/lib/libX11-xcb.so.1 (0xb4931000) libXtst.so.6 => /usr/lib/libXtst.so.6 (0xb492a000) libXi.so.6 => /usr/lib/libXi.so.6 (0xb491b000)
libxcb-atom.so.1 => /usr/lib/libxcb-atom.so.1 (0xb4916000) libwrap.so.0 => /usr/lib/libwrap.so.0 (0xb490d000) libsndfile.so.1 => /usr/lib/libsndfile.so.1 (0xb489d000) libFLAC.so.8 => /usr/lib/libFLAC.so.8 (0xb4860000) libvorbisenc.so.2 => /usr/lib/libvorbisenc.so.2 (0xb46e9000) libvorbis.so.0 => /usr/lib/libvorbis.so.0 (0xb46be000) libogg.so.0 => /usr/lib/libogg.so.0 (0xb46b7000)
libasyncns.so.0 => /usr/lib/libasyncns.so.0 (0xb46af000) libdbus-1.so.3 => /lib/libdbus-1.so.3 (0xb466c000) libcap.so.2 => /lib/libcap.so.2 (0xb4666000)
libQtXml.so.4 => /usr/lib/libQtXml.so.4 (0xb4623000) libnsl.so.1 => /lib/libnsl.so.1 (0xb460c000)
libresolv.so.2 => /lib/libresolv.so.2 (0xb45f6000)

?
?

hat am 14. April 2011 um 10:17 geschrieben:

The libqt-mt library is only one lib of a qt program. ?
?

fsb: >ldd /usr/lib/libgdk-x11-2.0.so.0 | cut -d' ' -f 3 | xargs cat | wc -c 9804745?

And so is the libgdk of a gtk program.?
?

?

7 vs. 9 Mb. Just for the Qt/Gtk library.?

Please compare whole programs.?
?

?

And that only size matters is not quite correct: for each library the number of symbols in the libraries must be resolved. The more libraries must be resolved, the more work there is for the linker.?

Since you gave no proof for this statement, I will answer with another unproven:?
The bigger a library the more code, the more symbols must be resolved. ? ?
I don't know how to test the library loading time, but here are some timings of minimal gtk2/qt programs:
?
time ./testgtk2

real??? 0m0.035s
user??? 0m0.028s
sys???? 0m0.004s

time ./testqt

real??? 0m0.160s
user??? 0m0.088s
sys???? 0m0.032s

?

That was the main issue in KDE: to reduce the number of symbols to be resolved. This meant, less libraries.

I doubt that combining several libs into one accelerates much.

Mattias
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I know. But it's not relevant for the list.
It was just meant to demonstrate that loading libgtk-x11-2.0.so uses the same set of libs as an LCL app.

Like I said, I have no LCL Qt app to compare with.

But you are right, I didn't check all Qt libs. It didn't occur to me to check for uppercase Qt files.

Michael.

Mattias Gaertner wrote

> fsb: >ldd /usr/lib/libqt-mt.so.3.3.8 | cut -d' ' -f 3 | xargs cat | wc -c > 7172681? The libqt-mt library is only one lib of a qt program.

Yes. My bad, see my answer to Felipe. :/

? > 7 vs. 9 Mb. Just for the Qt/Gtk library.? Please compare whole programs.?

Since I don't have the needed Qt libs, that will be hard. Please disregard my timings.

It's not my statement. It's someone else's. see e.g.

http://lwn.net/Articles/192624/

and

http://keycorner.org/pub/text/doc/kde-slow.txt

I assume they knew what they were talking about.
?
Michael.

Mattias Gaertner wrote

The libqt-mt library is only one lib of a qt program.

no, libqt-mt is complete qt-3.XXX library. in Qt 4 they splitted core,gui etc.

zeljko