After further research I'm thinking about dropping the libunwind support. The backtrace()/backtrace_symbols() API is more widely available: darwin, freebsd, linux, netbsd, openbsd (via port), solaris, and of course it's built-in, whereas libunwind is only available for linux, freebsd, hpux, solaris, and requires an external dependency.
-- Peter Eisentraut http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
