Document -march=unset option behavior and usage #98
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Add documentation for the -march=unset option that allows ignoring previous -march options and deriving architecture from -mcpu. The -march=unset option is particularly useful for build systems and toolchain configurations where architecture should always be derived from CPU specification rather than potentially conflicting -march options.
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LLVM Patch: llvm/llvm-project#148321 |
cmuellner
approved these changes
Jul 31, 2025
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GCC patch has landed, so I believe it's settle down now :) |
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GCC commit 4a182418c89666e7594bcb0e5edc5194aa147910 ("RISC-V: Support CPUs in -march.") has not been reverted yet but should be reverted. |
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Add documentation for the -march=unset option that allows ignoring previous -march options and deriving architecture from -mcpu.
The -march=unset option is particularly useful for build systems and toolchain configurations where architecture should always be derived from CPU specification rather than potentially conflicting -march options.