intel compiler not finding (system) header files

[michael <linux@networkingnewsletter.org.uk>]

Folks, on my Debian dual-Xeon box, I have tried to install the Intel 
C/C++ compiler (ifc). I have followed Intel's instructions in "Platform 
Notes: Using Intel C++ Compiler on Unsupported Operating Systems". (This 
was essentially using 'alien' to convert rpm->deb, then dpkg and then 
sed INSTALLDIR to the name of the actual install directory for all .sh 
scripts)

However, when I try to compile code that has usual C++ headers in (eg 
"#include <iostream>") it fails to find them.

I presume it's not looking in the default system libraries...

Ideas?

Thanks, Michael
(tried to search past postings but keep getting timed out when 
attempting to access lists.debian.org)