Linker error: undefined reference to `fstat'

Question

I am getting below linker errors while building Qt for embedded ARM linux platform, Any ideas what can be the reason? or How to solve it?

.obj/release-shared-emb-arm/qtconcurrentiteratekernel.o: In function getticks()': qtconcurrentiteratekernel.cpp:(.text+0x60): undefined reference toclock_gettime' .obj/release-shared-emb-arm/qthread_unix.o: In function set_thread_data(QThreadData*)': qthread_unix.cpp:(.text+0x40): undefined reference to__tls_get_addr' .obj/release-shared-emb-arm/qthread_unix.o: In function QThreadData::current()': qthread_unix.cpp:(.text+0x37c): undefined reference to__tls_get_addr' .obj/release-shared-emb-arm/qresource.o: In function QDynamicFileResourceRoot::registerSelf(QString const&)': qresource.cpp:(.text._ZN24QDynamicFileResourceRoot12registerSelfERK7QString[QDynamicFileResourceRoot::registerSelf(QString const&)]+0x88): undefined reference tofstat' .obj/release-shared-emb-arm/qfilesystemengine.o: In function QFileSystemEngine::fillMetaData(int, QFileSystemMetaData&)': qfilesystemengine.cpp:(.text+0x490): undefined reference tofstat' .obj/release-shared-emb-arm/qfilesystemengine_unix.o: In function QFileSystemEngine::currentPath()': qfilesystemengine_unix.cpp:(.text+0x34): undefined reference tostat' .obj/release-shared-emb-arm/qfilesystemengine_unix.o: In function QFileSystemEngine::removeDirectory(QFileSystemEntry const&, bool)': qfilesystemengine_unix.cpp:(.text+0x3bc): undefined reference to stat' .obj/release-shared-emb-arm/qfilesystemengine_unix.o: In function QFileSystemEngine::createDirectory(QFileSystemEntry const&, bool)': qfilesystemengine_unix.cpp:(.text+0x5c4): undefined reference tostat' .obj/release-shared-emb-arm/qfilesystemengine_unix.o: In function QFileSystemEngine::fillMetaData(QFileSystemEntry const&, QFileSystemMetaData&, QFlags<QFileSystemMetaData::MetaDataFlag>)': qfilesystemengine_unix.cpp:(.text+0xda4): undefined reference to lstat' qfilesystemengine_unix.cpp:(.text+0xe34): undefined reference to stat' .obj/release-shared-emb-arm/qtranslator.o: In function QTranslatorPrivate::do_load(QString const&)': qtranslator.cpp:(.text+0x1730): undefined reference to `fstat' collect2: ld returned 1 exit status make[1]: * [../../lib/libQtCore.so.4.8.0] Error 1

Answer 1

It seems like there's something wrong with your toolchain or qmake.conf. Try to manually link to libc and to rt library either in your qmake.conf or in the configure using -l and -L: http://doc.qt.nokia.com/stable/configure-options.html.