Hi everyone,

I am using lastest version of Qt 4.6.1.
Current i write some program for image process.
When i compile the program, i got the following error,

Running build steps for project mypro...
Configuration unchanged, skipping QMake step.
Starting: /usr/bin/make -w
make: Entering directory `/home/czhang/mypro/mypro'
/home/czhang/qtsdk-2010.01/qt/bin/qmake -spec ../../qtsdk-2010.01/qt/mkspecs/linux-g++ -unix CONFIG+=debug -o Makefile mypro.pro
make: Leaving directory `/home/czhang/mypro/mypro'
make: Entering directory `/home/czhang/mypro/mypro'
g++ -Wl,-rpath,/home/czhang/qtsdk-2010.01/qt/lib -o mypro main.o mainwindow.o pwdialog.o globVar.o prefenencedialog.o dbeditdialog.o dbdialog.o dbsearchdialog.o newrecorddialog.o moc_mainwindow.o moc_pwdialog.o moc_prefenencedialog.o moc_dbeditdialog.o moc_dbdialog.o moc_dbsearchdialog.o moc_newrecorddialog.o -L/home/czhang/qtsdk-2010.01/qt/lib -lqextserialport -lQtSql -L/home/czhang/qtsdk-2010.01/qt/lib -lQtGui -L/usr/X11R6/lib -lQtCore -lpthread
make: Leaving directory `/home/czhang/mypro/mypro'
/usr/lib/libfontconfig.so.1: undefined reference to `FT_Select_Size'
collect2: ld returned 1 exit status
make: *** [mypro] Error 1
Exited with code 2.
Error while building project mypro
When executing build step 'Make'
I googled a lot. someone mentioned about the freetype on my system is either too old or too new to the system.
I checked my freetype package has been installed already.

Qt Code: 
  1. [root@s-c cz]# yum install freetype
  2. Loaded plugins: presto, refresh-packagekit
  3. adobe-linux-i386                                                     |  951 B     00:00     
  4. updates/metalink                                                     | 5.9 kB     00:00     
  5. Setting up Install Process
  6. Package freetype-2.3.11-3.fc12.i686 already installed and latest version
  7. Nothing to do
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can anyone give me a hint please?
Thanks in advance.