linux-kernel - [PATCH v5 01/68] selftests: Compile with -D_GNU

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Message-ID: <20240522005913.3540131-2-edliaw@google.com>
Date: Wed, 22 May 2024 00:56:47 +0000
From: Edward Liaw <edliaw@...gle.com>
To: shuah@...nel.org, "Mickaël Salaün" <mic@...ikod.net>, 
	"Günther Noack" <gnoack@...gle.com>, Christian Brauner <brauner@...nel.org>, 
	Richard Cochran <richardcochran@...il.com>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	"David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
	kernel-team@...roid.com, Edward Liaw <edliaw@...gle.com>, 
	linux-security-module@...r.kernel.org, netdev@...r.kernel.org, 
	linux-riscv@...ts.infradead.org, bpf@...r.kernel.org, 
	John Hubbard <jhubbard@...dia.com>
Subject: [PATCH v5 01/68] selftests: Compile with -D_GNU_SOURCE when including lib.mk

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@...dia.com>
Signed-off-by: Edward Liaw <edliaw@...gle.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