[Bug target/69894] New: [6 Regression] dependency of gcc-plugin.h not installed on aarch64-linux-gnu

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69894

            Bug ID: 69894
           Summary: [6 Regression] dependency of gcc-plugin.h not
                    installed on aarch64-linux-gnu
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

seen when trying to build the gcc-python-plugin on aarch64-linux-gnu.

config/aarch64/aarch64-opts.h: fatal error: aarch64-arches.def: No such file or
directory.

what is the correct fix, add it to tm_file in config.gcc?