libc bug with __mmap linkage?

[Douglas Greiman]

The mmap linker symbol is weak, presumably so that one may replace it
with their own version. However, the corresponding strong __mmap symbol
is only a local symbol, not global (external), and so cannot be called
by a replacement mmap(). Is this a bug?

By comparison, __libc_malloc and __gettimeofday are external symbols.

I looked at glibc-2.1.3 and glibc-2.2.2 (Redhat 6.2 and 7.1
respectively).

-- 
Douglas Greiman
Software Engineer
Google!