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Once that is done, then when building with clang, via: make LLVM=3D1 -C tools/testing/selftests ...the following error occurs: clang: error: cannot specify -o when generating multiple output files This is because clang, unlike gcc, won't accept invocations of this form: clang file1.c header2.h Fix this by using selftests/lib.mk facilities for tracking local header file dependencies: add them to LOCAL_HDRS, leaving only the .c files to be passed to the compiler. [1] https://lore.kernel.org/all/20240329-selftests-libmk-llvm-rfc-v1-1-2f9e= d7d1c49f@valentinobst.de/ Fixes: 8e289f454289 ("selftests/resctrl: Add resctrl.h into build deps") Cc: Ilpo J=C3=A4rvinen Signed-off-by: John Hubbard Acked-by: Reinette Chatre --- tools/testing/selftests/resctrl/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selft= ests/resctrl/Makefile index 2deac2031de9..021863f86053 100644 --- a/tools/testing/selftests/resctrl/Makefile +++ b/tools/testing/selftests/resctrl/Makefile @@ -5,6 +5,8 @@ CFLAGS +=3D $(KHDR_INCLUDES) =20 TEST_GEN_PROGS :=3D resctrl_tests =20 +LOCAL_HDRS +=3D $(wildcard *.h) + include ../lib.mk =20 -$(OUTPUT)/resctrl_tests: $(wildcard *.[ch]) +$(OUTPUT)/resctrl_tests: $(wildcard *.c) base-commit: f03359bca01bf4372cf2c118cd9a987a5951b1c8 prerequisite-patch-id: b901ece2a5b78503e2fb5480f20e304d36a0ea27 --=20 2.45.0