i build ovmf as part of my obs qemu/etc build

  https://build.opensuse.org/project/show/home:pgnd:Virtualization:qemu

builds with gcc9 have been working great for a _long_ time.

following/testing the GCC10-compatibility META

  Bug 1157217 - [META] GCC 10 package failures
   https://bugzilla.opensuse.org/show_bug.cgi?id=1157217

qemu builds w/ gcc10 were recently fixed

  Bug 1169728 - GCC 10: qemu build fails
   https://bugzilla.opensuse.org/show_bug.cgi?id=1169728

when I switch MY build to gcc10, ovmf build fails.

here's the GCC10+ovmf build log

  https://paste.opensuse.org/949a8539

so far, I can additionally verify that switching BACK to gcc9 cures the
failed-build problem;

i.e., gcc9 build's OK == "succeeded". status here:

 https://build.opensuse.org/project/show/home:pgnd:Virtualization:qemu

i understand that's a different statement than gcc10 _is_ the problem.