[Bug 214904] head -r309179 clang 3.9.0 TARGET_ARCH=powerpc64 cross-built buildkernel stops for: rejected assembler notation

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214904 --- Comment #1 from Mark Millard --- (In reply to Mark Millard from comment #0) I've now also tried this on a powerpc64 running a minor variant of head -r309179 and it gets the same result that the amd64 cross build

clang 3.9.0 buildkernel on old powerpc64's vs. trying to build hwpmc_e500.o and the like. . .

[Note: At present I can buildworld using WITH_LIB32= on powerpc64 for TARGET_ARCH=powerpc64 via clang 3.9.0 from a minor variant of head -r309179 . That does not work for amd64 cross compiling to powerpc64 due to assembler notation rejections.] When I attempt to buildkernel (with WERROR= ) via