Re: [PATCH] selftests/exec: build with -fPIE instead of -pie, to make clang happy

On Fri, May 03, 2024 at 07:23:01PM -0700, John Hubbard wrote:

clang doesn't deal well with "-pie -static": it warns that -pie is an unused option here. Changing to "-fPIE -static" solves this problem for clang, while keeping the gcc results identical.

The problem is visible when building via:

make LLVM=1 -C tools/testing/selftests

Again: gcc 13 produces identical binaries for all of these programs, both before and after this commit (using "-pie"), and after (using "-fPIE").

Also, the runtime results are the same for both clang and gcc builds.

Thanks for this! It got solved differently here: https://lkml.kernel.org/r/20240416152831.3199999-1-usama.anjum@collabora.com

Does that work for you as well?

-Kees