Cross-compiling Qt-4.8 fails due to undefined interface
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Hi,
I'm trying to cross-compile Qt-4.8 for ARM. I have an ARM chroot which contains the Qt-4.8 depedencies. I set the cross-compiler in
mkspecs/qws/linux-arm-g++ and I run the configure script with the following options:@./configure -opensource -arch arm -xplatform qws/linux-arm-g++ -release -openssl -no-cups -no-gtkstyle -no-webkit -nomake examples -nomake demos
-I$ARMROOT/usr/include -L$ARMROOT/usr/lib -L$ARMROOT/lib
-lX11 -lxcb -lXau -lXdmcp -lXext
--prefix=$ARMROOT/usr/local/Trolltech/Qt-4.8.0-arm-cross $*@NOTE: ARMROOT is the path of prepared ARM environment (chroot)
Then I launch the build with make which uses the cross-compiler well but I get the following error during the corelib's compilation:
@/usr/local/armv7-webkit/usr/local/src/qt/bin/moc -DQT_SHARED -DQT_BUILD_CORE_LIB -DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DELF_INTERPRETER="/lib64/ld-linux-x86-64.so.2" -DQLIBRARYINFO_EPOCROOT -DHB_EXPORT=Q_CORE_EXPORT -DQT_NO_DEBUG -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../mkspecs/qws/linux-arm-g++ -I. -I../../include -I../../include/QtCore -I.rcc/release-shared -Iglobal -I../../tools/shared -I../3rdparty/zlib -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I.moc/release-shared codecs/qtextcodecplugin.h -o .moc/release-shared/moc_qtextcodecplugin.cpp
QFSFileEngine::currentPath: stat(".") failed
QFSFileEngine::currentPath: stat(".") failed
codecs/qtextcodecplugin.h:73: Error: Undefined interface
make: *** [.moc/release-shared/moc_qtextcodecplugin.cpp] Error 1@I googled for similar problems and I found that the removement of some moc temporary files can solve this:
http://www.qtforum.org/article/31561/error-when-building-libraries.htmlProbably it worked for earlier versions of Qt but I haven't found any tmp directory or mocinclude.* files in Qt-4.8 sources.
One additional thing I tried both the released tarball and the source from the repository.
Any suggestions? Is there anybody who have met this problem earlier?
Thanks,
Peter -
The only way I could get it to compile was to patch it:
@Q_INTERFACES(QTextCodecFactoryInterface:QFactoryInterface)@
into
@Q_INTERFACES(QTextCodecFactoryInterface)@I have not gotten the whole of Qt to compile yet, so I haven't run anything and, consequently, don't know what effect this patch has on Qt's behaviour.
I wonder if the problem is compiler-related. I get a successful compile for my workstation, just running configure and make. It's g++ 4.6.1 on Ubuntu.
The target compiler (for use with crosstool-ng) is g++4.5.2. However, the docs for Qt don't suggest a particular version.Another thing I noticed, is that the include paths are not necessarily the same for a host build versus target build. Specifically, I have noticed that the critical include path
@-I../../include/QtCore@
is usually missing.
When put together with you comment regarding compilation "on a board", it seems that a bit of work is still required in order to do cross/target builds.