When building with clang, via:
make LLVM=1 -C tools/testing/selftests
...clang warns that -no-pie is "unused during compilation".
This occurs because clang only wants to see -no-pie during linking. Here, we don't have a separate linking stage, so a compiler warning is unavoidable without (wastefully) restructuring the Makefile.
Avoid the warning by simply disabling that warning, for clang builds.
Acked-by: Muhammad Usama Anjum usama.anjum@collabora.com Signed-off-by: John Hubbard jhubbard@nvidia.com --- tools/testing/selftests/x86/Makefile | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile index d0bb32bd5538..5c8757a25998 100644 --- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -40,6 +40,13 @@ CFLAGS := -O2 -g -std=gnu99 -pthread -Wall $(KHDR_INCLUDES) # call32_from_64 in thunks.S uses absolute addresses. ifeq ($(CAN_BUILD_WITH_NOPIE),1) CFLAGS += -no-pie + +ifneq ($(LLVM),) +# clang only wants to see -no-pie during linking. Here, we don't have a separate +# linking stage, so a compiler warning is unavoidable without (wastefully) +# restructuring the Makefile. Avoid this by simply disabling that warning. +CFLAGS += -Wno-unused-command-line-argument +endif endif
define gen-target-rule-32