[redland-dev] cannot configure raptor2-2.0.6 on ubuntu 11.04

[Bob Morris]

on my Dell Studio XPS running Ubuntu 11.04.  raptor2-2.0.6 configure fails with
   "checking XML parser to use... configure: error: No XML parser
available - please install expat or libxml"

  Yet both libxml and expat are installed, e.g.
   ~:  ls -l /usr/lib/libxml2* returns
lrwxrwxrwx 1 root root      16 2011-11-12 15:23 /usr/lib/libxml2.so.2
-> libxml2.so.2.7.8
-rw-r--r-- 1 root root 1212948 2011-06-16 10:04 /usr/lib/libxml2.so.2.7.8

One thing: Dell curiously delivers the machine with an i386 kernel:
   ~: uname -a
Linux milne 2.6.38-13-generic-pae #53-Ubuntu SMP Mon Nov 28 19:41:58
UTC 2011 i686 athlon i386 GNU/Linux

however,  ./configure --build=i386
has the same failure to find libxml

On an Ubuntu 11.10 system with the x86_64 kernel,   raptor2-2.0.6
confirgured without incident

Suggestions welcome


--Bob Morris