Use of mcheck during GDB development

[Florian Weimer <fweimer at redhat dot com>]

We need to get rid of the mcheck functionality in glibc because we 
really, really want to stop calling the malloc hook functions.

A future glibc version will provide a lightweight heap checker, with 
functionality comparable to mcheck (but thread-safe!) as linkable and 
LD_PRELOAD-able (perhaps under a different name than libmcheck).

How critical is the mcheck functionality to GDB development?  Would it 
be a problem if next glibc release would issue a deprecation warning 
without actually having a suitable replacement in-tree?

I want to get the deprecation notice out as soon as possible, but I 
might not be able to finish the mcheck replacement in time for the next 
glibc release.

Thanks,
Florian