[boost] config macro for presence of unordered containers?

Subject: [boost] config macro for presence of unordered containers?
From: David Abrahams (dave_at_[hidden])
Date: 2008-12-15 16:02:52

Hi John,

I'd like to suppress GCC's backward-compatibility warnings by using
<unordered_set> instead of <backward/hash_set> or whatever it is, but I
can't find a config macro that tells me <unordered_set> is available.
Can we set one up, or something else I can use for that purpose?

Thanks,

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com