Fix the error reported by clang:

In file included from mdwe_test.c:17: ./../kselftest_harness.h:1169:2: error: call to undeclared function 'asprintf'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1169 | asprintf(&test_name, "%s%s%s.%s", f->name, | ^ 1 warning generated.

The gcc reports it as warning:

In file included from mdwe_test.c:17: ../kselftest_harness.h: In function ‘__run_test’: ../kselftest_harness.h:1169:9: warning: implicit declaration of function ‘asprintf’; did you mean ‘vsprintf’? [-Wimplicit-function-declaration] 1169 | asprintf(&test_name, "%s%s%s.%s", f->name, | ^~~~~~~~ | vsprintf

Fix this by setting _GNU_SOURCE macro needed to get exposure to the asprintf().

Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- tools/testing/selftests/mm/mdwe_test.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c index 200bedcdc32e9..1e01d3ddc11c5 100644 --- a/tools/testing/selftests/mm/mdwe_test.c +++ b/tools/testing/selftests/mm/mdwe_test.c @@ -7,6 +7,7 @@ #include <linux/mman.h> #include <linux/prctl.h>

+#define _GNU_SOURCE #include <stdio.h> #include <stdlib.h> #include <sys/auxv.h>