undefined reference errors while compiling a QT program
[root@stack example1]# make
g++ -m64 -Wl,-O1 -Wl,-rpath,/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib -o example1 fac1.o    -L/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib -lQtGui -lQtCore -lpthread
/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib/libQtCore.so: undefined reference to `g_main_context_push_thread_default'
/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib/libQtCore.so: undefined reference to `inotify_init1@GLIBC_2.9'
/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib/libQtGui.so: undefined reference to `pipe2@GLIBC_2.9'
/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib/libQtCore.so: undefined reference to `g_main_context_pop_thread_default'
/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib/libQtGui.so: undefined reference to `FcFreeTypeQueryFace'
/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib/libQtGui.so: undefined reference to `FT_Library_SetLcdFilter'
/opt/QtSDK/Desktop/Qt/4.8.0/gcc/lib/libQtGui.so: undefined reference to `__longjmp_chk@GLIBC_2.11'
collect2: ld returned 1 exit status
make: *** [example1] Error 1
[root@stack example1]#