You also have to config with "--enable-locale", which I think is off by default.
I don't see any easy way to check for this other than to simply do a "select 'a' < 'A'". The lc_collate information is stored in pg_control and doesn't appear to be shadowed in a PG table or otherwise available from SQL.
There's a "contrib" program to dig the information out from pg_control but we don't want to require folks to compile such optional utilities just to pass a bootstrap/install test and it would be unlikely to be included in distribution RPMs anyway.
I've e-mailed Tom Lane to see if there's a good way to do this other than the "select" hack ...