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Date: Wed, 22 May 2024 00:56:47 +0000
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Subject: [PATCH v5 01/68] selftests: Compile with -D_GNU_SOURCE when including lib.mk
From: Edward Liaw <edliaw@google.com>
To: shuah@kernel.org, "=?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?=" <mic@digikod.net>, 
	"=?UTF-8?q?G=C3=BCnther=20Noack?=" <gnoack@google.com>, Christian Brauner <brauner@kernel.org>, 
	Richard Cochran <richardcochran@gmail.com>, Paul Walmsley <paul.walmsley@sifive.com>, 
	Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, 
	Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, 
	"David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, 
	Jesper Dangaard Brouer <hawk@kernel.org>, John Fastabend <john.fastabend@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, 
	kernel-team@android.com, Edward Liaw <edliaw@google.com>, 
	linux-security-module@vger.kernel.org, netdev@vger.kernel.org, 
	linux-riscv@lists.infradead.org, bpf@vger.kernel.org, 
	John Hubbard <jhubbard@nvidia.com>
Content-Type: text/plain; charset="UTF-8"

lib.mk will add -D_GNU_SOURCE to CFLAGS by default.  This will make it
unnecessary to add #define _GNU_SOURCE in the source code.

Suggested-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Edward Liaw <edliaw@google.com>
---
 tools/testing/selftests/lib.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 429535816dbd..e782f4c96aee 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -188,6 +188,9 @@ endef
 clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
 	$(CLEAN)
 
+# Build with _GNU_SOURCE by default
+CFLAGS += -D_GNU_SOURCE
+
 # Enables to extend CFLAGS and LDFLAGS from command line, e.g.
 # make USERCFLAGS=-Werror USERLDFLAGS=-static
 CFLAGS += $(USERCFLAGS)
-- 
2.45.1.288.g0e0cd299f1-goog