Centralize the _GNU_SOURCE definition to CFLAGS in lib.mk. Remove
redundant defines from Makefiles that import lib.mk. Convert any usage
of "#define _GNU_SOURCE 1" to "#define _GNU_SOURCE".
This uses the form "-D_GNU_SOURCE=", which is equivalent to
"#define _GNU_SOURCE".
Otherwise using "-D_GNU_SOURCE" is equivalent to "-D_GNU_SOURCE=1" and
"#define _GNU_SOURCE 1", which is less commonly seen in source code and
would require many changes in selftests to avoid redefinition warnings.
Suggested-by: John Hubbard <jhubbard@xxxxxxxxxx>
Signed-off-by: Edward Liaw <edliaw@xxxxxxxxxx>
---
tools/testing/selftests/exec/Makefile | 1 -
tools/testing/selftests/futex/functional/Makefile | 2 +-
tools/testing/selftests/intel_pstate/Makefile | 2 +-
tools/testing/selftests/iommu/Makefile | 2 --
tools/testing/selftests/kvm/Makefile | 2 +-
tools/testing/selftests/lib.mk | 3 +++
tools/testing/selftests/mm/thuge-gen.c | 2 +-
tools/testing/selftests/net/Makefile | 2 +-
tools/testing/selftests/net/tcp_ao/Makefile | 2 +-
tools/testing/selftests/proc/Makefile | 1 -
tools/testing/selftests/resctrl/Makefile | 2 +-
tools/testing/selftests/ring-buffer/Makefile | 1 -
tools/testing/selftests/riscv/mm/Makefile | 2 +-
tools/testing/selftests/sgx/Makefile | 2 +-
tools/testing/selftests/tmpfs/Makefile | 1 -
15 files changed, 12 insertions(+), 15 deletions(-)