Since verion 8.1 of the Intel C++ compiler is out, I decided to upgrade to it.
In order to do that, I first uninstalled all other Intel compilers and tools I had on my system (C++ 8.0 with substitute headers, Fortran 8.0 and idb 7.3.2). I left only the license files where they were (/opt/licenses). Subsequently, I downloaded the latest 8.1 package from premier.intel.com (package l_cc_p_8.1.021.tar.gz) and unpacked it with the command:
gzip -cd l_cc_p_8.1.021.tar.gz | tar -x