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On Wed, 2022-10-26 at 14:37 -0400, Rich Freeman wrote: |
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> Another possible issue is bad -march settings. That usually is an |
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> issue if you change your CPU and boot off of an existing hard drive. |
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> If you're going to upgrade your CPU you should rebuild all of @system |
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> (at least) with -march set to something very minimal. Don't assume |
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> that a newer CPU does everything an existing one does - they sometimes |
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> do drop instructions. You can set -mcpu to whatever you want, as a |
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> bad -mcpu will only cause minor performance issues. |
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Further reading on this: |
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https://wiki.gentoo.org/wiki/Safe_CFLAGS |
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I've always used this as a reference for helping ensure make.conf is |
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not only going to be well optimized, but produce reliable binaries. |
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