Bug: Fix PPC64 native/POWER10 baseline builds #30372
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Wide versions of GCC (≤13) produce ambiguous bugs with compiler target attributes when `-mcpu/host` flags are provided via environment variables or via Meson build, leading to an inability to raise the default baseline to POWER10. This is fixed by enabling the newly added Highway option `-DHWY_DISABLE_ATTR` to address the issue, as reported to Highway. This patch also fixes the Clang build bug reported by explicitly adding `-mvsx` along with `-mcpu`.
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Wide versions of GCC (≤13) produce ambiguous bugs with compiler target attributes when
-mcpu/hostflags are provided via environment variables or via Meson build,leading to an inability to raise the default baseline to POWER10.
This is fixed by enabling the newly added Highway option
-DHWY_DISABLE_ATTRto address the issue,as reported to Highway. This patch also fixes the Clang build bug reported by explicitly
adding
-mvsxalong with-mcpu.