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arm-none fixups - Remove "-unknown" from `llvm_target` for arm\*v7r-none-eabi\* targets. - Remove redundant `c_enum_min_bits` option from the thumbv4t-none-eabi target. - Fix comments about GCC/Clang's enum width for arm-none targets. Previously part of #110482, which is a larger change to add a new target. These nits were found along the way.
rustc_target
contains some very low-level details that are
specific to different compilation targets and so forth.
For more information about how rustc works, see the rustc dev guide.