809216233555 ("selftests/harness: remove use of LINE_MAX") introduced asprintf into kselftest_harness.h, which is a GNU extension and needs _GNU_SOURCE to either be defined prior to including headers or with the -D_GNU_SOURCE flag passed to the compiler.
Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX") Signed-off-by: Edward Liaw edliaw@google.com --- tools/testing/selftests/prctl/Makefile | 1 + 1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile index 01dc90fbb509..23d319a7a322 100644 --- a/tools/testing/selftests/prctl/Makefile +++ b/tools/testing/selftests/prctl/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 +CFLAGS += -D_GNU_SOURCE ifndef CROSS_COMPILE uname_M := $(shell uname -m 2>/dev/null || echo not) ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/) -- 2.45.0.rc0.197.gbae5840b3b-goog