Installed Qt SDK in Linux, errors building examples

[Compeau]

I installed the Qt SDK for Linux/X11 32-bit on a system using Red Hat Enterprise Linux 5. When I try to build some of the simple examples in Qt Creator, I get errors. Here is the error I get when I attempt to build the SDI example:

g++ -Wl,-rpath,/home/user/qtsdk-2010.02/qt/lib -o sdi main.o mainwindow.o moc_mainwindow.o qrc_sdi.o -L/home/user/qtsdk-2010.02/qt/lib -lQtGui -L/home/user/qtsdk-2010.02/qt/lib -L/usr/X11R6/lib -lQtCore -lpthread
/home/user/qtsdk-2010.02/qt/lib/libQtGui.so: undefined reference to `FcFreeTypeQueryFace'
collect2: ld returned 1 exit status
make: Leaving directory `/home/user/qtsdk-2010.02/qt/examples/mainwindows/sdi'
make: *** [sdi] Error 1
Exited with code 2.
Error while building project sdi
When executing build step 'Make'

Any idea what the cause of these errors are? Any help would be greatly appreciated.

[Lykurg]

Have a look at the requirements for Qt on X11: http://doc.trolltech.com/4.6/requirements-x11.html. Seems you are missing Free Type.

[Compeau]

I had an older version of FreeType installed in /usr/local, but thinking that maybe Qt4 needed a newer version, I downloaded and built the latest version of FreeType, and installed it in the same location (/usr/local). This does not fix the problem, I get the same error. here is the version of FreeType I have installed:

[user@localhost ~]$ freetype-config --version
10.0.4
[user@localhost ~]$ freetype-config --ftversion
2.3.12

Could this be an environment variable issue, or Qt4 looking in another path for FreeType?

[Compeau]

Do I need to build qmake? The qmake executable already exists in the sdk. I just don't know what I need to do to get Qt working for me.

[norobro]

On my Debian system 'FcFreeTypeQueryFace' is defined in fcfreetype.h which is in the development package of libfontconfig1. The Debian package name is "libfontconfig1-dev". Do you have all of the recommended dev packages installed as per Lykurg's link?

[Compeau]

On my Debian system 'FcFreeTypeQueryFace' is defined in fcfreetype.h which is in the development package of libfontconfig1. The Debian package name is "libfontconfig1-dev". Do you have all of the recommended dev packages installed as per Lykurg's link?

Ok, I got it working. For some reason the version of FontConfig installed on my system wasn't working with Qt (either because it was a too-old version, or it was installed in a location that Qt didn't look at). I installed the source for the latest version of FontConfig and built it, and now I can compile and run Qt projects.