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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)
Add LIBBPF_VERSION LIBBPF_VERSION is already used to generate libbpf.pc file but was not actuall set. Set it same way it's done in kernel tree. Version is in sync with version script for DSO. Before: % grep Version src/libbpf.pc Version: After: % grep Version src/libbpf.pc Version: 0.0.2 Fixes: 93bc1d0 ("makefile: sync generate pkg-config file for libbpf") Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 16:37:26 -07:00
VERSION = 0
PATCHLEVEL = 0
libbpf: fix extraversion in Makefile The current LIBBPF_VERSION (0.0.3) doesn't match with ABI version LIBBPF_0.0.4. Fix the EXTRAVERSION portion.
2019-07-31 12:34:43 -07:00
EXTRAVERSION = 4
Add LIBBPF_VERSION LIBBPF_VERSION is already used to generate libbpf.pc file but was not actuall set. Set it same way it's done in kernel tree. Version is in sync with version script for DSO. Before: % grep Version src/libbpf.pc Version: After: % grep Version src/libbpf.pc Version: 0.0.2 Fixes: 93bc1d0 ("makefile: sync generate pkg-config file for libbpf") Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 16:37:26 -07:00
LIBBPF_VERSION = $(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
TOPDIR = ..
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
INCLUDES := -I. -I$(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
Build shared lib by default, add options to turn it off The vast majority of use cases want a shared library, so to be more user and packager friendly invert the makefile logic and always build both static and shared libraries by default. Add BUILD_STATIC_ONLY variable for the corner cases where only a static library is needed Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-29 16:29:49 +00:00
ifndef BUILD_STATIC_ONLY
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)
Makefile: use pkg-config to get libelf flags libbpf uses libelf symbols internally, so it depends on it and needs to link against it. Upstream this was fixed by linking directory to libelf: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=89dedaef49d36adc2bb5e7e4c38b52fa3013c7c8 For this project, intended to be used as a general library, try first to use pkg-config instead, and only fallback to just passing -lelf. This will be useful for cross compiling, among other cases. Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-28 19:31:46 +00:00
ALL_LDFLAGS += $(LDFLAGS)
ifdef NO_PKG_CONFIG
ALL_LDFLAGS += -lelf
else
PKG_CONFIG ?= pkg-config
ALL_CFLAGS += $(shell $(PKG_CONFIG) --cflags libelf)
ALL_LDFLAGS += $(shell $(PKG_CONFIG) --libs libelf)
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
OBJDIR ?= .
OBJS := $(addprefix $(OBJDIR)/,bpf.o btf.o libbpf.o libbpf_errno.o netlink.o \
build: add hashmap and btf_dump to OBJS list Fix Makefile to include expected object files. Fixes https://github.com/libbpf/libbpf/issues/52. Reported-by: Robert McCabe <robert.mccabe@rockwellcollins.com> Signed-off-by: Andrii Nakryiko <andriin@fb.com>
2019-05-30 15:07:51 -07:00
nlattr.o str_error.o libbpf_probes.o bpf_prog_linfo.o xsk.o \
btf_dump.o hashmap.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 := $(OBJDIR)/libbpf.a
Build shared lib by default, add options to turn it off The vast majority of use cases want a shared library, so to be more user and packager friendly invert the makefile logic and always build both static and shared libraries by default. Add BUILD_STATIC_ONLY variable for the corner cases where only a static library is needed Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-29 16:29:49 +00:00
ifndef BUILD_STATIC_ONLY
Add symlinks for DSO Add symlinks with version suffix in a way similar to how it's done in kernel tree. The differences with kernel tree version: * LIBS is used to handle both files and targets w/o separation; * Version symlink is created in corresponding target as opposed to do everything in libbpf.so.$(LIBBPF_VERSION). Example: % OBJDIR=build DESTDIR=root make install ... % find root/ ! -type d -exec ls -l {} + -rw-r--r--. 1 rdna users 6046 Apr 2 18:09 root/usr/include/bpf/bpf.h -rw-r--r--. 1 rdna users 3485 Apr 2 18:09 root/usr/include/bpf/btf.h -rw-r--r--. 1 rdna users 16454 Apr 2 18:09 root/usr/include/bpf/libbpf.h -rw-r--r--. 1 rdna users 602030 Apr 2 18:09 root/usr/lib64/libbpf.a lrwxrwxrwx. 1 rdna users 11 Apr 2 18:09 root/usr/lib64/libbpf.so -> libbpf.so.0 lrwxrwxrwx. 1 rdna users 15 Apr 2 18:09 root/usr/lib64/libbpf.so.0 -> libbpf.so.0.0.2 -rwxr-xr-x. 1 rdna users 377640 Apr 2 18:09 root/usr/lib64/libbpf.so.0.0.2 -rw-r--r--. 1 rdna users 241 Apr 2 18:09 root/usr/lib64/pkgconfig/libbpf.pc Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 18:07:41 -07:00
LIBS += $(OBJDIR)/libbpf.so \
$(OBJDIR)/libbpf.so.$(VERSION) \
$(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
Enable version script for DSO building Version script was synced from kernel tree but not enabled in Makefile. Enable it same way it's done in kernel tree. % readelf -s --wide src/libbpf.so | grep -Eo '[^ ]+@LIBBPF_.*' | \ cut -d@ -f 3 | sort | uniq -c 121 LIBBPF_0.0.1 29 LIBBPF_0.0.2 Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 16:33:00 -07:00
VERSION_SCRIPT := libbpf.map
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
AF_XDP: Fix install_headers to also install AF_XDP ones Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
2019-05-21 16:09:46 +02:00
HEADERS := bpf.h libbpf.h btf.h xsk.h libbpf_util.h
Install bpf_common.h in install_uapi_headers (#12) bpf_common.h is hardly ever changed so it was not installed together with other uapi headers. Some environments are still prefer to be consistent and install all relevant uapi headers so add bpf_common.h to uapi headers. Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-02-15 14:43:41 -08:00
UAPI_HEADERS := $(addprefix $(TOPDIR)/include/uapi/linux/,bpf.h bpf_common.h \
btf.h)
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
Fix libbpf.pc target OBJDIR was not specified for libbpf.pc. It works by default since default value of OBJDIR is current directory, but breaks as soon as OBJDIR is set to some other directory: % OBJDIR=build DESTDIR=root make install ... ar rcs build/libbpf.a build/bpf.o build/btf.o build/libbpf.o build/libbpf_errno.o build/netlink.o build/nlattr.o build/str_error.o build/libbpf_probes.o build/bpf_prog_linfo.o build/xsk.o cc -shared -lelf build/bpf.o build/btf.o build/libbpf.o build/libbpf_errno.o build/netlink.o build/nlattr.o build/str_error.o build/libbpf_probes.o build/bpf_prog_linfo.o build/xsk.o -o build/libbpf.so make: *** No rule to make target `libbpf.pc', needed by `all'. Stop. Fix it. Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-03-29 14:33:20 -07:00
PC_FILE := $(OBJDIR)/libbpf.pc
makefile: sync generate pkg-config file for libbpf Generate a libbpf.pc file at build time so that users can rely on pkg-config to find the library, its CFLAGS and LDFLAGS. This has been applied on bpf-next, so the corresponding change is backported here: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=dd399ac9e343c7573c47d6820e4a23013c54749d Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-28 19:07:41 +00:00
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 = 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
makefile: sync generate pkg-config file for libbpf Generate a libbpf.pc file at build time so that users can rely on pkg-config to find the library, its CFLAGS and LDFLAGS. This has been applied on bpf-next, so the corresponding change is backported here: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=dd399ac9e343c7573c47d6820e4a23013c54749d Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-28 19:07:41 +00:00
all: $(LIBS) $(PC_FILE)
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
$(OBJDIR)/libbpf.a: $(OBJS)
$(AR) rcs $@ $^
Add symlinks for DSO Add symlinks with version suffix in a way similar to how it's done in kernel tree. The differences with kernel tree version: * LIBS is used to handle both files and targets w/o separation; * Version symlink is created in corresponding target as opposed to do everything in libbpf.so.$(LIBBPF_VERSION). Example: % OBJDIR=build DESTDIR=root make install ... % find root/ ! -type d -exec ls -l {} + -rw-r--r--. 1 rdna users 6046 Apr 2 18:09 root/usr/include/bpf/bpf.h -rw-r--r--. 1 rdna users 3485 Apr 2 18:09 root/usr/include/bpf/btf.h -rw-r--r--. 1 rdna users 16454 Apr 2 18:09 root/usr/include/bpf/libbpf.h -rw-r--r--. 1 rdna users 602030 Apr 2 18:09 root/usr/lib64/libbpf.a lrwxrwxrwx. 1 rdna users 11 Apr 2 18:09 root/usr/lib64/libbpf.so -> libbpf.so.0 lrwxrwxrwx. 1 rdna users 15 Apr 2 18:09 root/usr/lib64/libbpf.so.0 -> libbpf.so.0.0.2 -rwxr-xr-x. 1 rdna users 377640 Apr 2 18:09 root/usr/lib64/libbpf.so.0.0.2 -rw-r--r--. 1 rdna users 241 Apr 2 18:09 root/usr/lib64/pkgconfig/libbpf.pc Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 18:07:41 -07:00
$(OBJDIR)/libbpf.so: $(OBJDIR)/libbpf.so.$(VERSION)
ln -sf $(^F) $@
$(OBJDIR)/libbpf.so.$(VERSION): $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
ln -sf $(^F) $@
$(OBJDIR)/libbpf.so.$(LIBBPF_VERSION): $(OBJS)
Enable version script for DSO building Version script was synced from kernel tree but not enabled in Makefile. Enable it same way it's done in kernel tree. % readelf -s --wide src/libbpf.so | grep -Eo '[^ ]+@LIBBPF_.*' | \ cut -d@ -f 3 | sort | uniq -c 121 LIBBPF_0.0.1 29 LIBBPF_0.0.2 Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 16:33:00 -07:00
$(CC) -shared $(ALL_LDFLAGS) -Wl,--version-script=$(VERSION_SCRIPT) \
Add SONAME to DSO Adopting common practice that was adopted earlier in kernel tree. Resulting DSO: % readelf -d root/usr/lib64/libbpf.so | grep SONAME 0x000000000000000e (SONAME) Library soname: [libbpf.so.0] Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 18:41:41 -07:00
-Wl,-soname,libbpf.so.$(VERSION) \
Enable version script for DSO building Version script was synced from kernel tree but not enabled in Makefile. Enable it same way it's done in kernel tree. % readelf -s --wide src/libbpf.so | grep -Eo '[^ ]+@LIBBPF_.*' | \ cut -d@ -f 3 | sort | uniq -c 121 LIBBPF_0.0.1 29 LIBBPF_0.0.2 Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 16:33:00 -07:00
$^ -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
makefile: sync generate pkg-config file for libbpf Generate a libbpf.pc file at build time so that users can rely on pkg-config to find the library, its CFLAGS and LDFLAGS. This has been applied on bpf-next, so the corresponding change is backported here: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=dd399ac9e343c7573c47d6820e4a23013c54749d Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-28 19:07:41 +00:00
$(OBJDIR)/libbpf.pc:
sed -e "s|@PREFIX@|$(PREFIX)|" \
-e "s|@LIBDIR@|$(LIBDIR)|" \
-e "s|@VERSION@|$(LIBBPF_VERSION)|" \
< libbpf.pc.template > $@
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
$(OBJDIR)/%.o: %.c
Makefile: pass CPPFLAGS to the compiler Distro tools like dpkg-buildpackage use the preprocessor flags to pass important flags, like hardening features. Pass CPPFLAGS to CC. Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-28 19:33:17 +00:00
$(CC) $(ALL_CFLAGS) $(CPPFLAGS) -c $< -o $@
Extend build and add install rules to Makefile Introduce multiple improvements to Makefile to make the build more flexible and support install: * Support overriding CFLAGS by user but keep required flags in place. ALL_FLAGS is used in Makefile as recommended in [1]. * Add additional BUILD_SHARED flag to build dynamically linked flavor of the library. If the flag is set, -fPIC is also passed to make it possible to build .so. * Support building in a separate directory provided by OBJDIR variable. * Add multiple install targets. By default the library itself and libbpf headers are installed (install target). UAPI headers can be optionally installed by user. * All installation paths, including PREFIX, library and include directories can be overridden. UAPI can be made different from include directory for libbpf headers. That makes it possible to keep latest <linux/bpf.h> in a place that doesn't conflict with the one installed e.g. by kernel-headers package and use it in user's build system. * Support DESTDIR (see [2]). * Support overriding LDFLAGS. * Use utilities such as rm directly as recommended in [3]. * Use compiler and related programs (such as ar) via make variables as recommended in [3]. * In clean rule remove all possible build artifacts not to rely on passed options (e.g. if build was done w/ BUILD_SHARED, but clean w/o it). * Document new build options in README. [1] https://www.gnu.org/software/make/manual/html_node/Command-Variables.html#Command-Variables [2] https://www.gnu.org/prep/standards/html_node/DESTDIR.html [3] https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html#Utilities-in-Makefiles Signed-off-by: Andrey Ignatov <rdna@fb.com>
2018-10-11 14:58:49 -07:00
define do_install
if [ ! -d '$(DESTDIR)$2' ]; then \
$(INSTALL) -d -m 755 '$(DESTDIR)$2'; \
fi; \
$(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR)$2'
endef
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
Add symlinks for DSO Add symlinks with version suffix in a way similar to how it's done in kernel tree. The differences with kernel tree version: * LIBS is used to handle both files and targets w/o separation; * Version symlink is created in corresponding target as opposed to do everything in libbpf.so.$(LIBBPF_VERSION). Example: % OBJDIR=build DESTDIR=root make install ... % find root/ ! -type d -exec ls -l {} + -rw-r--r--. 1 rdna users 6046 Apr 2 18:09 root/usr/include/bpf/bpf.h -rw-r--r--. 1 rdna users 3485 Apr 2 18:09 root/usr/include/bpf/btf.h -rw-r--r--. 1 rdna users 16454 Apr 2 18:09 root/usr/include/bpf/libbpf.h -rw-r--r--. 1 rdna users 602030 Apr 2 18:09 root/usr/lib64/libbpf.a lrwxrwxrwx. 1 rdna users 11 Apr 2 18:09 root/usr/lib64/libbpf.so -> libbpf.so.0 lrwxrwxrwx. 1 rdna users 15 Apr 2 18:09 root/usr/lib64/libbpf.so.0 -> libbpf.so.0.0.2 -rwxr-xr-x. 1 rdna users 377640 Apr 2 18:09 root/usr/lib64/libbpf.so.0.0.2 -rw-r--r--. 1 rdna users 241 Apr 2 18:09 root/usr/lib64/pkgconfig/libbpf.pc Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 18:07:41 -07:00
# Preserve symlinks at installation.
define do_s_install
if [ ! -d '$(DESTDIR)$2' ]; then \
$(INSTALL) -d -m 755 '$(DESTDIR)$2'; \
fi; \
cp -fpR $1 '$(DESTDIR)$2'
endef
makefile: sync generate pkg-config file for libbpf Generate a libbpf.pc file at build time so that users can rely on pkg-config to find the library, its CFLAGS and LDFLAGS. This has been applied on bpf-next, so the corresponding change is backported here: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=dd399ac9e343c7573c47d6820e4a23013c54749d Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-28 19:07:41 +00:00
install: all install_headers install_pkgconfig
Add symlinks for DSO Add symlinks with version suffix in a way similar to how it's done in kernel tree. The differences with kernel tree version: * LIBS is used to handle both files and targets w/o separation; * Version symlink is created in corresponding target as opposed to do everything in libbpf.so.$(LIBBPF_VERSION). Example: % OBJDIR=build DESTDIR=root make install ... % find root/ ! -type d -exec ls -l {} + -rw-r--r--. 1 rdna users 6046 Apr 2 18:09 root/usr/include/bpf/bpf.h -rw-r--r--. 1 rdna users 3485 Apr 2 18:09 root/usr/include/bpf/btf.h -rw-r--r--. 1 rdna users 16454 Apr 2 18:09 root/usr/include/bpf/libbpf.h -rw-r--r--. 1 rdna users 602030 Apr 2 18:09 root/usr/lib64/libbpf.a lrwxrwxrwx. 1 rdna users 11 Apr 2 18:09 root/usr/lib64/libbpf.so -> libbpf.so.0 lrwxrwxrwx. 1 rdna users 15 Apr 2 18:09 root/usr/lib64/libbpf.so.0 -> libbpf.so.0.0.2 -rwxr-xr-x. 1 rdna users 377640 Apr 2 18:09 root/usr/lib64/libbpf.so.0.0.2 -rw-r--r--. 1 rdna users 241 Apr 2 18:09 root/usr/lib64/pkgconfig/libbpf.pc Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 18:07:41 -07:00
$(call do_s_install,$(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
makefile: sync generate pkg-config file for libbpf Generate a libbpf.pc file at build time so that users can rely on pkg-config to find the library, its CFLAGS and LDFLAGS. This has been applied on bpf-next, so the corresponding change is backported here: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=dd399ac9e343c7573c47d6820e4a23013c54749d Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
2019-03-28 19:07:41 +00:00
install_pkgconfig: $(PC_FILE)
$(call do_install,$(PC_FILE),$(LIBDIR)/pkgconfig,644)
add a simple Makefile to build and clean up add missing macros, static inline functions, etc. add README to illustrate the purpose of this repo. Signed-off-by: Yonghong Song <yhs@fb.com>
2018-10-09 21:45:49 -07:00
clean:
Add symlinks for DSO Add symlinks with version suffix in a way similar to how it's done in kernel tree. The differences with kernel tree version: * LIBS is used to handle both files and targets w/o separation; * Version symlink is created in corresponding target as opposed to do everything in libbpf.so.$(LIBBPF_VERSION). Example: % OBJDIR=build DESTDIR=root make install ... % find root/ ! -type d -exec ls -l {} + -rw-r--r--. 1 rdna users 6046 Apr 2 18:09 root/usr/include/bpf/bpf.h -rw-r--r--. 1 rdna users 3485 Apr 2 18:09 root/usr/include/bpf/btf.h -rw-r--r--. 1 rdna users 16454 Apr 2 18:09 root/usr/include/bpf/libbpf.h -rw-r--r--. 1 rdna users 602030 Apr 2 18:09 root/usr/lib64/libbpf.a lrwxrwxrwx. 1 rdna users 11 Apr 2 18:09 root/usr/lib64/libbpf.so -> libbpf.so.0 lrwxrwxrwx. 1 rdna users 15 Apr 2 18:09 root/usr/lib64/libbpf.so.0 -> libbpf.so.0.0.2 -rwxr-xr-x. 1 rdna users 377640 Apr 2 18:09 root/usr/lib64/libbpf.so.0.0.2 -rw-r--r--. 1 rdna users 241 Apr 2 18:09 root/usr/lib64/pkgconfig/libbpf.pc Signed-off-by: Andrey Ignatov <rdna@fb.com>
2019-04-02 18:07:41 -07:00
rm -f *.o *.a *.so *.so.* *.pc
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