Hi! The r13-2943-g11a113d501ff64 made aarch64.h include aarch64-option-extensions.def, but that file isn't installed for building plugins.
The following patch should fix that, ok for trunk if it passes bootstrap/regtest + building plugin against it? 2022-12-20 Jakub Jelinek <ja...@redhat.com> * config/aarch64/t-aarch64 (OPTIONS_H_EXTRA): Add aarch64-option-extensions.def. --- gcc/config/aarch64/t-aarch64.jj 2022-04-04 13:55:46.001615509 +0200 +++ gcc/config/aarch64/t-aarch64 2022-12-20 11:31:03.245651809 +0100 @@ -22,7 +22,8 @@ TM_H += $(srcdir)/config/aarch64/aarch64 OPTIONS_H_EXTRA += $(srcdir)/config/aarch64/aarch64-cores.def \ $(srcdir)/config/aarch64/aarch64-arches.def \ $(srcdir)/config/aarch64/aarch64-fusion-pairs.def \ - $(srcdir)/config/aarch64/aarch64-tuning-flags.def + $(srcdir)/config/aarch64/aarch64-tuning-flags.def \ + $(srcdir)/config/aarch64/aarch64-option-extensions.def $(srcdir)/config/aarch64/aarch64-tune.md: s-aarch64-tune-md; @true s-aarch64-tune-md: $(srcdir)/config/aarch64/gentune.sh \ Jakub