Issue Installing Root on Ubuntu 12.04 64bit

Hello all,

I am currently trying to install root 5.99 on Ubuntu 12.04 64 bit. I am having an issue when I try to run ./configure.

If I run ./configure linuxx8664gcc --enable-qt I get the ouptut as shown in attachment configx8664log.txt

However if I run ./configure --enable-qt configure seems to complete correctly, the log file is attachment configlog.txt

Is there a reason why the two should be different? Is root being configured correctly with ./confiugre --enable-qt even though it is being installed on a 64 bit operating system?
configlog.txt (257 KB)
configx8664log.txt (9.69 KB)