[gccsdk] march=armv4 machines

Using gcc -E -dM foo.c
I noticed that when using march=armv4 that gcc sets __ARM_ARCH_4__ 1
otherwise it will be __ARM_ARCH_3__ 1
using -mfpu=vfp sets __ARM_ARCH_6ZK__ 1

Just want to be clear on what RISC OS machines these cover with regard to
assembler routines.
None applied for smaller than __ARM_ARCH_4__ so perhaps a recipe for
earlier than arch 4 could be described as the default?

Also, for the vfp useage, is there anything extra to be specified to build
for the vfp directory library for either/both static and shared?
I think it just puts it in abi-2 .0 if left alone?

Thanks for any help
RonM.



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