Seems that uclibc has had the equivalent of libexecinfo (known as libubacktrace) for some time:
http://lists.uclibc.org/pipermail/uclibc-cvs/2010-September/028267.html

If you guys think it’s useful, the uclibc option appears to be UCLIBC_HAS_BACKTRACE.

If we do switch this on, we should at least:

- remove testing/libexecinfo from aports

• examine testing/apache-mod-backtrace

(from redmine: issue id 565, created on 2011-04-04, closed on 2011-04-30)