Official toolchain builder here, and yes, the lower 3 errors are harmless for FRC*. The first error is for simulation, and if you aren't using simulation, is safe to ignore. I could have sworn that error was fixed in November though....
*Those errors are because we only install "arm-frc-..." prefixed tools, and using the plugins eclipse only uses them. However, the generic eclipse C/C++ tools that aren't used for FRC expect non-prefixed. Those 3 errors will only matter if you do local C/C++ dev for your system, not FRC dev.
See
http://www.chiefdelphi.com/forums/sh...d.php?t=132042 for more details:
Having said that, you can make them go away by prefixing the value listed in the error with "arm-frc-linux-gnueabi-". I'm afraid I don't remember where it is off the top of my head but can provide the exact value if you copy-paste the entire error.