Have configure work without flags on Debian/Ubuntu

On a Debian/Ubuntu system, you have to help configure to find the JS library:

xulrunner_gre_version=`xulrunner --gre-version`
./configure -with-js-lib=/usr/lib/xulrunner-devel${xulrunner_gre_version}/lib/ -with-js-include=/usr/lib/xulrunner-devel${xulrunner_gre_version}/include/ && make

It seems that Yelp is able to do this on it's own using special m4 macros[1].

I would like the CouchDB configure script to be able to find the JS library without requiring extra arguments.

[1] http://www.google.com/codesearch/p?#ErvFMsc8kPE/pub/GNOME/desktop/2.16/2.16.0/sources/yelp-2.16.0.tar.gz|U-t_e2pgMiw/yelp-2.16.0/configure.in
http://www.google.com/codesearch/p?#ErvFMsc8kPE/pub/GNOME/desktop/2.16/2.16.0/sources/yelp-2.16.0.tar.gz|U-t_e2pgMiw/yelp-2.16.0/m4/gecko.m4&d=8