Although Linux author, Linus Torvalds, says that the official kernel compiler is gcc, several people tried to compile Linux kernel with Intel's compiler. There are patches available. Several people interested in Intel's compiler even did a mini benchmark on kernels compiled with gcc. For the whole story, ready the thread in the archive of Linux kernel mailing list.
LKML was very interesting reading today, James Ketrenos announced Intel PRO/Wireless 2100 Driver for Linux aka wireless part of Centrino. Should you buy system with this hardware, do not forget to read terms and conditions for the firmware for the Intel PRO/Wireless 2100...
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