I have no /usr/lib64, only /usr/lib (which hosts the 64b libs) ans /usr/lib32 (for 32b libs). I know there used to be a different organization (with /usr/lib64) but it's a bit messy since.
I'll try with /usr/lib to begin.
EDIT: I have a problem during autogen:
The first warning doesn't seem to be a big issue but I'm not sure what package to install for xorg-server... xorg-dev?
configure: WARNING: doxygen not found - documentation targets will be skipped
configure: error: Package requirements (xorg-server >= 1.7.0 xproto xext kbproto inputproto randrproto) were not met:
No package 'xorg-server' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables XORG_CFLAGS
and XORG_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.