Autoconf ignoring "WANT_AUTOCONF" should I fill a bug?

[Till Varoquaux]

Title says it all...
Usually the autoconf (resp. automake) ninary is a wrapper script to 
autoconf-$version_whatever$ (resp. automake...). However in debian and 
ubuntu it's a link (thanks to the update alternative system). The autotools 
are very pesky and you quite often have to choose your version depending on 
whatyou are building (for instance enlightenment stuff takes only recent 
versions).
This is generally done setting the WANT_AUTOCONF (resp. WANT_AUTOMAKE) 
environement variable. At least this works under gentoo and fedora. Should 
we be using a wrapper instead of a link (we could get this wrapper to work 
with update_alternative with some ugly fiddling)?
Sould I fill a bug?
P.S.:bug #13146 recommending to default to the last version would solve much 
hassle although not fully solving this in terms of being able to downgrad at 
need.
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