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libbpf/src/Makefile

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add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
TOPDIR = ..
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
INCLUDES := -I. -I$(TOPDIR)/include -I$(TOPDIR)/include/uapi
ALL_CFLAGS := $(INCLUDES)
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
FEATURE_REALLOCARRAY := $(shell $(TOPDIR)/scripts/check-reallocarray.sh)
ifneq ($(FEATURE_REALLOCARRAY),)
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
ALL_CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
endif
ifdef BUILD_SHARED
Symbols visibility (#3) * Sync from bpf-next Sync the following commits from bpf-next: commit ab9e08482122 ("libbpf: Per-symbol visibility for DSO") commit c034a177d3c8 ("bpf: bpftool, add flag to allow non-compat map definitions") Signed-off-by: Andrey Ignatov <rdna@fb.com> * Use -fvisibility=hidden by default for DSO This is Makefile part of: commit ab9e08482122 ("libbpf: Per-symbol visibility for DSO") See original commit for details.
2018-10-16 17:24:08 -07:00
ALL_CFLAGS += -fPIC -fvisibility=hidden
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
endif
CFLAGS ?= -g -O2 -Werror -Wall
ALL_CFLAGS += $(CFLAGS)
OBJDIR ?= .
OBJS := $(addprefix $(OBJDIR)/,bpf.o btf.o libbpf.o libbpf_errno.o netlink.o \
sync with latest bpf-next (#10) sync with latest bpf-next. tested with fb internal testcase and bcc. Signed-off-by: Yonghong Song <yhs@fb.com>
2019-02-07 21:58:07 -08:00
nlattr.o str_error.o libbpf_probes.o)
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
LIBS := $(OBJDIR)/libbpf.a
ifdef BUILD_SHARED
LIBS += $(OBJDIR)/libbpf.so
endif
HEADERS := bpf.h libbpf.h btf.h
UAPI_HEADERS := $(addprefix $(TOPDIR)/include/uapi/linux/,bpf.h btf.h)
INSTALL = install
DESTDIR ?=
ifeq ($(shell uname -m),x86_64)
LIBSUBDIR := lib64
else
LIBSUBDIR := lib
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
endif
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
PREFIX ?= /usr
LIBDIR ?= $(PREFIX)/$(LIBSUBDIR)
INCLUDEDIR ?= $(PREFIX)/include
UAPIDIR ?= $(PREFIX)/include
all: $(LIBS)
$(OBJDIR)/libbpf.a: $(OBJS)
$(AR) rcs $@ $^
$(OBJDIR)/libbpf.so: $(OBJS)
$(CC) -shared $(LDFLAGS) $^ -o $@
$(OBJDIR)/%.o: %.c
$(CC) $(ALL_CFLAGS) -c $< -o $@
define do_install
if [ ! -d '$(DESTDIR)$2' ]; then \
$(INSTALL) -d -m 755 '$(DESTDIR)$2'; \
fi; \
$(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR)$2'
endef
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
install: all install_headers
$(call do_install,$(LIBS),$(LIBDIR))
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
install_headers:
$(call do_install,$(HEADERS),$(INCLUDEDIR)/bpf,644)
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
# UAPI headers can be installed by a different package so they're not installed
# in by install rule.
install_uapi_headers:
$(call do_install,$(UAPI_HEADERS),$(UAPIDIR)/linux,644)
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
clean:
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
rm -f *.o *.a *.so
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