I am reading this remote so I cannot check all the details. Andreas Jaeger <aj(a)suse.de&gt; writes: Is there a documented guarantee this will never be needed? I'll happy to take your word for glibc related things, but isn't it is possible that for instance the gcc folk could decide to set it in libgcc.a? Or should I take your comment to mean that glic's malloc doesn't use the hook at all? Is the version in Debian potato an official released version. If not would it may be better just to make this patch when there is actually a version with this problem released? Jan P.S. I am interpreting your patch correctly as saying glibc doesn't actually define malloc_hook until after the first malloc.