selftests/sched_ext: Drop -rdynamic and stop clobbering LDFLAGS

CFLAGS passes the link-time flag -rdynamic to compile steps ($(CC) -c),
where it is unused. Under -Werror, Clang fails the build:

    $ make CC=clang-21
    clang-21: error: argument unused during compilation: '-rdynamic'
                     [-Werror,-Wunused-command-line-argument]

Nothing needs the exported symbols. Separately, LDFLAGS uses '=' rather than
'+=', discarding USERLDFLAGS from lib.mk.

Drop -rdynamic and append LDFLAGS with '+='. This fixes builds with
CC=clang-N while preserving USERLDFLAGS.

v2: Drop -rdynamic instead of moving it to LDFLAGS (Tejun Heo).

Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

0 files changed, 0 insertions, 0 deletions