Embedded Linux Primer

M. Tim Jones posted a very interesting article about the gcc extensions used in the Linux kernel. Ever wondered why you can't compile a modern Linux kernel with "just any old toolchain"?

Check this out from Jones' article:
"GCC and Linux are a great pair. Although they are independent pieces of software, Linux is totally dependent on GCC to enable it on new architectures. Linux further exploits features in GCC, called extensions, for greater functionality and optimization. This article explores many of these important extensions and shows you how they're used within the Linux kernel."

http://www.ibm.com/developerworks/linux/library/l-gcc-hacks/index.html?ca=dgr-lnxw04GCCKernel&S_Tact=105AGX59&S_CMP=GRsitelnxw04

or click here:

GCC Hacks