(Sorry, sent my reply prematurely.)
I've tried to compile texinfo-4.2
I suggest getting texinfo 4.3, which I released yesterday. It has a
newer gettext, which defines LANG_SORBIAN (as 0x2e).
texinfo-4.2/info/man.c:475: storage size of 'timeout' isn't known in
Usually struct timeval is in sys/time.h, it seems. Probably it's
somewhere else in your setup?
Hope this helps,