Building hadoop-0.22 branch on Centos6

[Graeme Seaton]

Hi,

Trying to build the hadoop-0.22 branch on Centos 6.1 and fails (on both 
32 and 64 bit versions) with:

     [exec] In file included from recordio.cc:22:
     [exec] xmlarchive.hh:77: error: conflicting return type specified 
for 'virtual unsigned int hadoop::MyBinInputStream::curPos() const'
     [exec] /usr/include/xercesc/util/BinInputStream.hpp:41: error:   
overriding 'virtual XMLFilePos xercesc_3_0::BinInputStream::curPos() const'
     [exec] xmlarchive.hh: In member function 'virtual 
xercesc_3_0::BinInputStream* hadoop::MyInputSource::makeStream() const':
     [exec] xmlarchive.hh:97: error: cannot allocate an object of 
abstract type 'hadoop::MyBinInputStream'
     [exec] xmlarchive.hh:71: note:   because the following virtual 
functions are pure within 'hadoop::MyBinInputStream':
     [exec] /usr/include/xercesc/util/BinInputStream.hpp:43: note:      
virtual XMLSize_t xercesc_3_0::BinInputStream::readBytes(XMLByte*, 
XMLSize_t)
     [exec] /usr/include/xercesc/util/BinInputStream.hpp:67: note:      
virtual const XMLCh* xercesc_3_0::BinInputStream::getContentType() const

Version of xerces is:

rpm -qa | grep xerces-c
xerces-c-3.0.1-20.el6.x86_64
xerces-c-devel-3.0.1-20.el6.x86_64

Is there a dependency on xereces-c 3.1 (or earlier versions)?  Have 
searched G but not found any solutions.  Will I need to install xerces-c 
3.1 manually?

Regards,

Graeme