The docs of FT_Set_Debug_Hook talks about FT_DEBUG_HOOK_TRUETYPE,
defined in ftobjs.h. Since internal headers are no longer available,
this value isn't available either...
I've marked this as a bug in the docs, to be resolved in a forthcoming
version.
Werner
FreeType 2.2.1 has been released.
It is available from
http://savannah.nongnu.org/download/freetype/
or
http://sourceforge.net/project/showfiles.php?group_id=3157
The latter site also holds older versions of the FreeType library.
See below for the relevant snippet from the CHANGES