On Wed, May 18, 2022 at 03:38:18PM -0700, Nick Desaulniers wrote:
> (so it seems that the preprocessor definition of `__thumb2__` is
> dependent on `-march=`, not `-Wa,-march=`).

Yes, it will be. -Wa,... are only ever passed to the assembler and do
not affect the preprocessor nor the compiler with GCC.

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