Sorry, but no, the *binary* toolchains are configured for ARMv7, and even if you pass the "-march=armv6" flag that doesn't change the configuration of libgcc and the other precompiled bit-and-bobs that get linked in.

If you build your own compiler from the Linaro sources then you can program it with any options you like. We test that ARMv5 works, so it's likely that ARMv6 will be fine (probably).

Andrew