Question

I just finished porting the QT4.5.3 GUI lib with touchscreen lib tslib1.4.1 to arm9 based S3C2440;but I find programs are running slow.How to make Qt4.5.3 run more smoothly?
I have already read the references on http://doc.trolltech.com/4.7-snapshot/fine-tuning-features.html and http://doc.trolltech.com/4.7-snapshot/qt-performance.html Any other suggestion according to your experience?Thanks！

Answer 1

I use the S3C24xx too. I use Qt 4.6.2. Here is my compile configuration

@host:/qt-everywhere-opensource-src-4.6.2#./configure \
-opensource \
-confirm-license \
-release -shared \
-embedded arm \
-xplatform qws/linux-arm-g++ \
-depths 16,18,24 \
-fast \
-optimized-qmake \
-pch \
-qt-sql-sqlite \
-qt-libjpeg \
-qt-zlib \
-qt-libpng \
-qt-freetype \
-little-endian -host-little-endian \
-no-qt3support \
-no-libtiff -no-libmng \
-no-opengl \
-no-mmx -no-sse -no-sse2 \
-no-3dnow \
-no-openssl \
-no-webkit \
-no-qvfb \
-no-phonon \
-no-nis \
-no-opengl \
-no-cups \
-no-glib \
-no-xcursor -no-xfixes -no-xrandr -no-xrender \
-no-separate-debug-info \
-nomake examples -nomake tools -nomake docs \
-qt-mouse-tslib -I/usr/local/tslib/include -L/usr/local/tslib/lib

@host:/qt-everywhere-opensource-src-4.6.2# make
@host:/qt-everywhere-opensource-src-4.6.2# make install

Also notice that, if you change optimization level of compiler in file qt-everywhere-opensource-src-4.6.2/mkspecs/common/g++.conf from -O2 to -O0 may cause the Qt library run very slow.
Hope it is useful for you.