Re: Has anyone had problems with GCC 4.0 and the kernel?

[Mikael Pettersson <mikpe@csd.uu.se>]

Scott Robert Ladd writes:
 > Hello,
 > 
 > I've had several inquiries recently in regard to compiling the kernel
 > with GCC 4.0. It seems folk are having problems, do a Google search, and
 > find my capsule review of GCC 4.0 at:
 > 
 > http://www.coyotegulch.com/reviews/gcc4/index.html
 > 
 > I'm not running a GCC 4.0-created kernel, but I had no problems
 > compiling it and running one a few weeks ago. Before I start looking
 > into this further, has anyone here had problems with GCC 4? Maybe I just
 > hallucinated that it compiled and booted... ;)

gcc-4.0.0 vanilla is broken and miscompiles some ipv4/sysctl stuff.
More recent 4.0.1 snapshots are OK.

I've been using gcc4 for 2.6 and 2.4 kernels since late January,
for both desktops and servers, and for i386/x86-64/ppc/ppc64.
Recent 2.6 kernels should work as-is, except perhaps in poorly
maintained drivers. The 2.4 kernels need fair amounts of patching,
99% of which is to prevent compile-time errors. These patches
are not yet merged into the standard 2.4 tree and may never be.