How important is mcheck?

GDB enables mcheck if available, unless Python with threading support is 
built in (which most distributions do).  I've proposed to deprecate 
mcheck in glibc, with a goal towards eventually replacing it with stubs 
unavailable to newly compiled programs.  GDB would still run (and 
compile), albeit without mcheck support.

I see two bug reports about issues discovered with mcheck, so maybe it 
is useful.

Could you move mcheck in-tree?  Then you'd be able to enable it 
regardless of Python threading support.

-- 
Florian Weimer / Red Hat Product Security Team