On 11.05.2014 09:20, Daniel Bowen wrote: > I have an embedded environment where we usenon-UI parts of Qt (Qt Core, Qt > Networking)on an ARM host processor. > > We’ve been using 4.8.4for a little while. There’s some other changes comingto > this code, and we’ve been looking to move > to5.xwith the upcoming 5.3. After working through several issues, I gotthe > release candidate ofQt5.3compiledfor this > processor. At first, libQt5Core.so.5.3.0was 6.6MB! With 4.8.4,we were able > to getlibQtCore4down to2.6 MB.
Here libQt5Core needs 3905596b after stripping (ARM, GCC 4.8.2, -O3) and with these options -no-c++11 -optimized-qmake -no-kms -no-cups -no-nis -no-iconv -system-zlib -system-pcre -no-pch -release -shared -largefile -opensource -confirm-license -gui -widgets --enable-linuxfb -no-directfb -no-xcb -opengl es2 -eglfs -openssl -no-fontconfig -no-gif -system-libjpeg -system-libpng -no-dbus -no-tslib -no-glib -no-icu -nomake examples For removing features you could also use 'qconfig' (now in the qttools package). http://qt-project.org/doc/qt-4.8/fine-tuning-features.html (Seems documentation got lost in Qt5) Peter > > So I started putting in -skip, -no-feature, etc.having features wewould still > use, but other things stripped out.I also > had a mkspec use -Os to optimize for size.Usingsomething likethis: > > OPENSSL_LIBS="-L(pathfor openssl)-lssl -lcrypto" ./configure -release > -opensource -prefix(pathfor > prefix)-extprefix(pathfor prefix)-shared -largefile -I(path for jpeg)-L(path > for jpeg)-sysroot(path for > sysroot)-xplatform linux-arm_v5t_le-g++ -confirm-license -system-zlib > -system-libpng -system-libjpeg -openssl-linked > -no-accessibility -no-freetype -no-harfbuzz -no-glib -no-gui -no-widgets > -no-cups -no-iconv -no-evdev -no-icu > -no-fontconfig -no-pch -no-dbus -no-xcb -no-directfb -no-linuxfb -no-kms > -no-opengl -nomake examples -nomake tests -skip > qtdeclarative -skip qtdoc -skip qtgraphicaleffects -skip qtlocation -skip > qtquick1 -skip qtquickcontrols -skip qtscript > -skip qttranslations -skip qtwebkit -skip qtwebkit-examples -skip qtx11extras > -skip qtxmlpatterns > -no-feature-TEXTHTMLPARSER -no-feature-TEXTODFWRITER -no-feature-CSSPARSER > -no-feature-CONCURRENT > -no-feature-DRAGANDDROP -no-feature-SESSIONMANAGER -no-feature-SHORTCUT > -no-feature-ACTION -no-feature-DOM > -no-feature-FILESYSTEMMODEL -no-feature-FILESYSTEMWATCHER > -no-feature-ITEMVIEWS -no-feature-DIRMODEL > -no-feature-STANDARDITEMMODEL -no-feature-PROXYMODEL > -no-feature-SORTFILTERPROXYMODEL -no-feature-IDENTITYPROXYMODEL > -no-feature-STRINGLISTMODEL -no-feature-LISTVIEW -no-feature-TABLEVIEW > -no-feature-TREEVIEW -no-feature-DATAWIDGETMAPPER > -no-feature-COLUMNVIEW -no-feature-MOVIE -no-feature-IMAGEFORMAT_PPM > -no-feature-IMAGEFORMAT_XBM > -no-feature-IMAGEFORMAT_XPM -no-feature-FREETYPE -no-feature-BIG_CODECS > -no-feature-ICONV -no-feature-FTP > -no-feature-ACCESSIBILITY -no-feature-ANIMATION -no-feature-STATEMACHINE > -no-feature-GESTURES -no-feature-DBUS > -no-feature-XMLSCHEMA-verbose > > It went down to 5.3 MB.5.3 MB was still too bit, so I went through the > features from qfeatures.txt, and > did“-no-feature”for every single feature listed. libQt5Core wouldn’t compile > without LIBRARY, SETTINGS and > REGULAREXPRESSION, so I took the“-no-feature”out for those things. Even with > all of that removed, libQt5Core.so.5.3.0 > was still4.3MBafterbeing stripped. Thatwould have some things removed though > that we want. > > Is there any way to get Qt Core to compile smaller, like under 3MB?Am I > missing anything to > skipor“-no-xyz”or“-nomake”or“-no-feature”? Why is libQt5Core.so.5.3.0 so > much bigger than libQtCore4.so.4.8.4? > > We may just need to moveto 4.8.6 and leave it there instead of jumping onto > 5.x. > > Thanks, > > -Daniel > > > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
