Re: [PATCH] powerpc: Don't add -mabi= flags when building with Clang

On Sun, Aug 18, 2019 at 12:13:21PM -0700, Nathan Chancellor wrote:

When building pseries_defconfig, building vdso32 errors out:

  error: unknown target ABI 'elfv1'

Commit 4dc831aa8813 ("powerpc: Fix compiling a BE kernel with a
powerpc64le toolchain") added these flags to fix building GCC but
clang is multitargeted and does not need these flags. The ABI is
properly set based on the target triple, which is derived from
CROSS_COMPILE.

You mean that LLVM does not *allow* you to select a different ABI, or
different ABI options, you always have to use the default.  (Everything
else you say is true for GCC as well).

(-mabi= does not set a "target ABI", fwiw, it is more subtle; please see
the documentation.  Unless LLVM is incompatible in that respect as well?)


Segher