[XeTeX] font selection debugging

[Vladimir Volovich]

"VV" == Vladimir Volovich writes:

 VV> what is the reason for different font pickup? how can it be
 VV> debugged?

> i tried setting FC_DEBUG=5 env.var. but got no useful debugging info from
> \font calls (i see debugging info on the first call to \font, showing
> how fontconfig reads available fonts, but no debugging for font matching
> at all, and subsequent \font calls show no debugging info whatsoever).

also, if i run e.g. \font\xxa="ArTarumianGrqiNor_U BoldItalic/I/ICU" at 10pt
is there an equivalent fc-match command i can run to get the same font
as xetex would get?

Best,
v.