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This page contained rather dated instructions. Check out nios2ecos where there are instructions under nios2ecos/tools on how to build the Nios toolchain w/libstdc++ STL POSIX threads exceptions for eCos. The same approach should apply to arm7.

ZY1000 JTAG Debugger
ARM7/9/11, XScale, Cortex-M3
Fast. No drivers!