Besides covering the most recently released versions of GCC, this book provides a complete command reference, explains how to use the info online help system, and covers material not covered in other texts, including profiling, test coverage, and how to build and install GCC on a variety of operating system and hardware platforms. It also covers how to integrate with other GNU development tools, including automake, autoconf, and libtool.
This is one of those books that truly changed my life. Prior to reading this book, I'd been building software from source code for so long that I really felt that I *should* know what exactly was going on. Heck, I'd even been patching code and using a few basic make flags. But this book ensures that you're not just hacking your way around GCC and actually helps you understand what is happening during the build process, what linking does and why it's important, how to fix problems, and so on.
It's a great read for people who compile software from source code and want to further their understanding of the process.
Also, it will make you appreciate GCC even more than you might already. I mean, I knew that GCC was a big deal but now i know /why/ it's a big deal.