2013/8/16 Darrell Anderson <darrella(a)hushmail.com>
Here is propoused patch which checks if demangle.h is
present.
Darrell, I have demangle.h on my system, so it's up to you to test
it.
Actually anybody can test --- just temporarily rename or move
/usr/include/demangle.h. :-)
The previous patch makes turning on the debug quite tricky, so better to
remove the ifdef's with NDEBUG in backtrace_symbols.c.
I've tested the build both with and without demangle.h and seems everything
is ok. so retest