ttmkfdir sometimes doesn't generate strings for fonts. For
example, the fonts in /usr/share/enlightenment/E-docs (from
the enlightenment package) are not recognized by ttmkfdir.
Some fonts are recognized.
The ttmkfdir at
does create entries for these fonts, and in general more
than the freetype package's version.
PS - freetype was not listed as a category.
this has been fixed for the next release.