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.
Link: https://lkml.kernel.org/r/20240625223454.1586259-2-edliaw@google.com
Signed-off-by: Edward Liaw <edliaw@google.com>
Suggested-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: André Almeida <andrealmeid@igalia.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Kees Cook <kees@kernel.org>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
# SPDX-License-Identifier: GPL-2.0
CFLAGS = -Wall
CFLAGS += -Wno-nonnull
-CFLAGS += -D_GNU_SOURCE
TEST_PROGS := binfmt_script.py
TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216 non-regular
# SPDX-License-Identifier: GPL-2.0
INCLUDES := -I../include -I../../ $(KHDR_INCLUDES)
-CFLAGS := $(CFLAGS) -g -O2 -Wall -D_GNU_SOURCE= -pthread $(INCLUDES) $(KHDR_INCLUDES)
+CFLAGS := $(CFLAGS) -g -O2 -Wall -pthread $(INCLUDES) $(KHDR_INCLUDES)
LDLIBS := -lpthread -lrt
LOCAL_HDRS := \
# SPDX-License-Identifier: GPL-2.0
-CFLAGS := $(CFLAGS) -Wall -D_GNU_SOURCE
+CFLAGS := $(CFLAGS) -Wall
LDLIBS += -lm
ARCH ?= $(shell uname -m 2>/dev/null || echo not)
CFLAGS += -Wall -O2 -Wno-unused-function
CFLAGS += $(KHDR_INCLUDES)
-CFLAGS += -D_GNU_SOURCE
-
TEST_GEN_PROGS :=
TEST_GEN_PROGS += iommufd
TEST_GEN_PROGS += iommufd_fail_nth
endif
CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \
-Wno-gnu-variable-sized-type-not-at-end -MD -MP -DCONFIG_64BIT \
- -D_GNU_SOURCE -fno-builtin-memcmp -fno-builtin-memcpy \
+ -fno-builtin-memcmp -fno-builtin-memcpy \
-fno-builtin-memset -fno-builtin-strnlen \
-fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \
-I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \
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)
sudo ipcs | awk '$1 == "0x00000000" {print $2}' | xargs -n1 sudo ipcrm -m
(warning this will remove all if someone else uses them) */
-#define _GNU_SOURCE 1
+#define _GNU_SOURCE
#include <sys/mman.h>
#include <linux/mman.h>
#include <stdlib.h>
# SPDX-License-Identifier: GPL-2.0
# Makefile for net selftests
-CFLAGS = -Wall -Wl,--no-as-needed -O2 -g
+CFLAGS += -Wall -Wl,--no-as-needed -O2 -g
CFLAGS += -I../../../../usr/include/ $(KHDR_INCLUDES)
# Additional include paths needed by kselftest.h
CFLAGS += -I../
LDLIBS += $(LIB) -pthread
LIBDEPS := lib/aolib.h Makefile
-CFLAGS := -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing
+CFLAGS += -Wall -O2 -g -fno-strict-aliasing
CFLAGS += $(KHDR_INCLUDES)
CFLAGS += -iquote ./lib/ -I ../../../../include/
# SPDX-License-Identifier: GPL-2.0-only
CFLAGS += -Wall -O2 -Wno-unused-function
-CFLAGS += -D_GNU_SOURCE
LDFLAGS += -pthread
TEST_GEN_PROGS :=
# SPDX-License-Identifier: GPL-2.0
-CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
+CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
CFLAGS += $(KHDR_INCLUDES)
TEST_GEN_PROGS := resctrl_tests
# SPDX-License-Identifier: GPL-2.0
CFLAGS += -Wl,-no-as-needed -Wall
CFLAGS += $(KHDR_INCLUDES)
-CFLAGS += -D_GNU_SOURCE
TEST_GEN_PROGS = map_test
# Originally tools/testing/arm64/abi/Makefile
# Additional include paths needed by kselftest.h and local headers
-CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.
+CFLAGS += -std=gnu99 -I.
TEST_GEN_FILES := mmap_default mmap_bottomup
endif
INCLUDES := -I$(top_srcdir)/tools/include
-HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC
+HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC $(CFLAGS)
HOST_LDFLAGS := -z noexecstack -lcrypto
ENCL_CFLAGS += -Wall -Werror -static-pie -nostdlib -ffreestanding -fPIE \
-fno-stack-protector -mrdrnd $(INCLUDES)
# SPDX-License-Identifier: GPL-2.0-only
CFLAGS += -Wall -O2
-CFLAGS += -D_GNU_SOURCE
TEST_GEN_PROGS :=
TEST_GEN_PROGS += bug-link-o-tmpfile
projects / thirdparty / linux.git / commitdiff
