[xdebug-general] trying to install using pecl and getting this error?

pecl install xdebug
downloading xdebug-2.0.4.tgz ...
Starting to download xdebug-2.0.4.tgz (288,497 bytes)
.................................done: 288,497 bytes
67 source files, building
running: phpize
Configuring for:
PHP Api Version: 20041225
Zend Module Api No: 20060613
Zend Extension Api No: 220060519
building in /var/tmp/pear-build-root/xdebug-2.0.4
running: /root/tmp/pear/xdebug/configure
checking for egrep... grep -E
checking for a sed that does not truncate output... /bin/sed
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... configure: error: cannot run C
compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.
ERROR: `/root/tmp/pear/xdebug/configure' failed
Received on Wed Feb 04 2009 - 06:30:24 GMT