[Linux-mips-kernel]gcc-3.0.2 toolchain build script

[Johannes S. <js...@co...>]

After many experiments, using information from Bradley D. LaRonde's
http://www.ltc.com/~brad/mips/mipsel-linux-cross-toolchain-building.txt
and other sources, I succeded building a mipsel-linux
cross-toolchain for an i386-linux host with:

- binutils-2.11.92.0.10
- gcc-3.0.2
- glibc-2.2.3 + linuxthreads (w/o soft-float).

I chose to install everything in --prefix=/home/js/mipsel, so I don't
have to install anything as root (and potentially ruin my native
gcc/glibc installation...).

The current linux-mips kernel with my patch for the
NEC MobilePro 780 PDA (VR4121) could be compiled successfully
with it, and a busybox statically linked with the glibc
works, too.


Quirks: During kernel compilation I get lots of warnings like:
  Warning: The -march option is incompatible to -mipsN and therefore ignored.

Some postings I read on the binutils mailing list suggest
that this is a binutils bug, or maybe arch/mips/Makefile
must be adjusted for the current binutils.
Anyway, the stuff I tried seemed to work.

The attached build script contains some comments about which
tool versions I chose and why. OTOH, I would be especially
grateful if someone could explain to me what the real
differences are between gcc-3.0.2 and gcc-2.96.x.


Regards,
Johannes