mird.h is not found

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=1622

Reported by Alexander Klimov, WIS alserkli@inbox.ru

I got error message
build/Pike/7.3/src/modules/Mird/mird_glue.c:25: mird.h: No such file or
directory

after I update CVS and run make CONFIGUREARGS="--prefix=/usr/local/gcc" sure

For some reason configure thinks checking for mird.h... no checking for mird_sync in -lmird... no checking if we can build libmird on this system... yes

but I (and gcc) can't find mird.h anywhere.