pre-built toolchains for arm

We have a number of options for cross-compiler toolchain.

• Pre-built toolchains:
  
  • CodeSourcery: This cross-compiler is used by almost all developers/companies using ARM devices. However, they only provide cross-compilers that work on x86/i386.
  • Emdebian: This cross-compiler is used by Debian. Available for amd64/x86_64 and i386/x86. 
  • Angstrom
• Tools for creating cross-compilers:
  
  • Crosstool-ng: Builds a cross-compiler from source. Non-distribution specific.
  • Crossdev: Gentoo's cross-compiler builder. Needs Gentoo.
  • Emdebian: Emdebian also provides ways to build your own toolchain.

Reference:
http://www.plugcomputer.org/plugwiki/index.php/Scratchbox2_based_cross_compiling