weak symbols and glibc versioning

[Mike Frysinger]

On Wednesday 06 January 2010 10:21:06 Ángel González wrote:
> I have a program for which I'd like to use "new" glibc features like
> accept4.
> Now, this program must work with an old glibc which doesn't provide
> those functions.

use a function pointer and during init, call dlopen() to search for the accept 
symbol in glibc.  if it isnt found, assign the function pointer to your local 
symbol.
-mike
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