-D_GNU_SOURCE= will be provided by lib.mk CFLAGS, so -D_GNU_SOURCE should be dropped to prevent redefinition warnings. Signed-off-by: Edward Liaw <edliaw@xxxxxxxxxx> --- tools/testing/selftests/iommu/Makefile | 2 -- 1 file changed, 2 deletions(-) diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile index 32c5fdfd0eef..fd6477911f24 100644 --- a/tools/testing/selftests/iommu/Makefile +++ b/tools/testing/selftests/iommu/Makefile @@ -2,8 +2,6 @@ CFLAGS += -Wall -O2 -Wno-unused-function CFLAGS += $(KHDR_INCLUDES) -CFLAGS += -D_GNU_SOURCE - TEST_GEN_PROGS := TEST_GEN_PROGS += iommufd TEST_GEN_PROGS += iommufd_fail_nth -- 2.45.2.741.gdbec12cfda-goog