configure can't find libgsm development files, but they are installed

Wed Aug 5 10:35:03 CDT 2009

Since yesterday, configure has been giving me a "libgsm development files not found" warning even though they are installed on my system. This is on openSUSE 11.1, 32 bit.

Is anyone else seeing this, or is something borked on my system? (Any hints as to where I might look would be appreciated.) 
-- 
Rosanne DiMesio <dimesio at earthlink.net>