/dev/shm/tdelibs/tdeio/tdeio/backtrace_symbols.c:57:22: fatal 
error: demangle.h: No such file or directory

We ran into this before with tdebase and we added 
DWITH_KDESKTOP_LOCK_BACKTRACE as a configure option in commit 
936d3cec 2013-01-26.

demangle.h is not supported in all distros.

I'll try to massage 936d3cec into tdelibs.

Darrell