On Tue, 18 May 2021 13:58:57 -0700, Nick Desaulniers wrote:

Until clang-12, clang would attempt to assemble 32b powerpc assembler in
64b emulation mode when using a 64b target triple with -m32, leading to
errors during the build of the compat VDSO. Simply disable all of
CONFIG_COMPAT; users should upgrade to the latest release of clang for
proper support.

Applied to powerpc/next.

[1/1] powerpc: Kconfig: disable CONFIG_COMPAT for clang < 12
      https://git.kernel.org/powerpc/c/6fcb574125e673f33ff058caa54b4e65629f3a08

cheers