Why won't Python 2/3 compile when I have valgrind installed?

Fri May 24 20:59:22 EDT 2013

This isn't a huge issue, but I'm wondering.  I'm running
Mac OS X, I tried to configure with --with-valgrind and
this is the error that I got:

configure: error: Valgrind support requested but headers not available

Now, I have valgrind installed, so it should work, yes?
If someone has any extra info on this, I'd appreciate it.
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