| # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) |
| # Most of this file is copied from tools/lib/traceevent/Makefile |
| |
| LIBBPF_VERSION := $(shell \ |
| grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | \ |
| sort -rV | head -n1 | cut -d'_' -f2) |
| LIBBPF_MAJOR_VERSION := $(firstword $(subst ., ,$(LIBBPF_VERSION))) |
| |
| MAKEFLAGS += --no-print-directory |
| |
| # This will work when bpf is built in tools env. where srctree |
| # isn't set and when invoked from selftests build, where srctree |
| # is a ".". building_out_of_srctree is undefined for in srctree |
| # builds |
| ifndef building_out_of_srctree |
| srctree := $(patsubst %/,%,$(dir $(CURDIR))) |
| srctree := $(patsubst %/,%,$(dir $(srctree))) |
| srctree := $(patsubst %/,%,$(dir $(srctree))) |
| #$(info Determined 'srctree' to be $(srctree)) |
| endif |
| |
| INSTALL = install |
| |
| # Use DESTDIR for installing into a different root directory. |
| # This is useful for building a package. The program will be |
| # installed in this directory as if it was the root directory. |
| # Then the build tool can move it later. |
| DESTDIR ?= |
| DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))' |
| |
| include $(srctree)/tools/scripts/Makefile.arch |
| |
| ifeq ($(LP64), 1) |
| libdir_relative = lib64 |
| else |
| libdir_relative = lib |
| endif |
| |
| prefix ?= /usr/local |
| libdir = $(prefix)/$(libdir_relative) |
| man_dir = $(prefix)/share/man |
| man_dir_SQ = '$(subst ','\'',$(man_dir))' |
| |
| export man_dir man_dir_SQ INSTALL |
| export DESTDIR DESTDIR_SQ |
| |
| include $(srctree)/tools/scripts/Makefile.include |
| |
| # copy a bit from Linux kbuild |
| |
| ifeq ("$(origin V)", "command line") |
| VERBOSE = $(V) |
| endif |
| ifndef VERBOSE |
| VERBOSE = 0 |
| endif |
| |
| FEATURE_USER = .libbpf |
| FEATURE_TESTS = libelf libelf-mmap bpf reallocarray cxx |
| FEATURE_DISPLAY = libelf bpf |
| |
| INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi |
| FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES) |
| |
| check_feat := 1 |
| NON_CHECK_FEAT_TARGETS := clean TAGS tags cscope help |
| ifdef MAKECMDGOALS |
| ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) |
| check_feat := 0 |
| endif |
| endif |
| |
| ifeq ($(check_feat),1) |
| ifeq ($(FEATURES_DUMP),) |
| include $(srctree)/tools/build/Makefile.feature |
| else |
| include $(FEATURES_DUMP) |
| endif |
| endif |
| |
| export prefix libdir src obj |
| |
| # Shell quotes |
| libdir_SQ = $(subst ','\'',$(libdir)) |
| libdir_relative_SQ = $(subst ','\'',$(libdir_relative)) |
| |
| OBJ = $@ |
| N = |
| |
| LIB_TARGET = libbpf.a libbpf.so.$(LIBBPF_VERSION) |
| LIB_FILE = libbpf.a libbpf.so* |
| PC_FILE = libbpf.pc |
| |
| # Set compile option CFLAGS |
| ifdef EXTRA_CFLAGS |
| CFLAGS := $(EXTRA_CFLAGS) |
| else |
| CFLAGS := -g -Wall |
| endif |
| |
| ifeq ($(feature-libelf-mmap), 1) |
| override CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT |
| endif |
| |
| ifeq ($(feature-reallocarray), 0) |
| override CFLAGS += -DCOMPAT_NEED_REALLOCARRAY |
| endif |
| |
| # Append required CFLAGS |
| override CFLAGS += $(EXTRA_WARNINGS) |
| override CFLAGS += -Werror -Wall |
| override CFLAGS += -fPIC |
| override CFLAGS += $(INCLUDES) |
| override CFLAGS += -fvisibility=hidden |
| override CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 |
| |
| # flags specific for shared library |
| SHLIB_FLAGS := -DSHARED |
| |
| ifeq ($(VERBOSE),1) |
| Q = |
| else |
| Q = @ |
| endif |
| |
| # Disable command line variables (CFLAGS) override from top |
| # level Makefile (perf), otherwise build Makefile will get |
| # the same command line setup. |
| MAKEOVERRIDES= |
| |
| all: |
| |
| export srctree OUTPUT CC LD CFLAGS V |
| include $(srctree)/tools/build/Makefile.include |
| |
| SHARED_OBJDIR := $(OUTPUT)sharedobjs/ |
| STATIC_OBJDIR := $(OUTPUT)staticobjs/ |
| BPF_IN_SHARED := $(SHARED_OBJDIR)libbpf-in.o |
| BPF_IN_STATIC := $(STATIC_OBJDIR)libbpf-in.o |
| VERSION_SCRIPT := libbpf.map |
| |
| LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET)) |
| LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE)) |
| PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE)) |
| |
| GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \ |
| cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \ |
| sed 's/\[.*\]//' | \ |
| awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}' | \ |
| sort -u | wc -l) |
| VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \ |
| grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l) |
| |
| CMD_TARGETS = $(LIB_TARGET) $(PC_FILE) |
| |
| CXX_TEST_TARGET = $(OUTPUT)test_libbpf |
| |
| ifeq ($(feature-cxx), 1) |
| CMD_TARGETS += $(CXX_TEST_TARGET) |
| endif |
| |
| TARGETS = $(CMD_TARGETS) |
| |
| all: fixdep |
| $(Q)$(MAKE) all_cmd |
| |
| all_cmd: $(CMD_TARGETS) check |
| |
| $(BPF_IN_SHARED): force elfdep bpfdep |
| @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \ |
| (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \ |
| echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true |
| @(test -f ../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \ |
| (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \ |
| echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf_common.h' differs from latest version at 'include/uapi/linux/bpf_common.h'" >&2 )) || true |
| @(test -f ../../include/uapi/linux/netlink.h -a -f ../../../include/uapi/linux/netlink.h && ( \ |
| (diff -B ../../include/uapi/linux/netlink.h ../../../include/uapi/linux/netlink.h >/dev/null) || \ |
| echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h'" >&2 )) || true |
| @(test -f ../../include/uapi/linux/if_link.h -a -f ../../../include/uapi/linux/if_link.h && ( \ |
| (diff -B ../../include/uapi/linux/if_link.h ../../../include/uapi/linux/if_link.h >/dev/null) || \ |
| echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_link.h' differs from latest version at 'include/uapi/linux/if_link.h'" >&2 )) || true |
| @(test -f ../../include/uapi/linux/if_xdp.h -a -f ../../../include/uapi/linux/if_xdp.h && ( \ |
| (diff -B ../../include/uapi/linux/if_xdp.h ../../../include/uapi/linux/if_xdp.h >/dev/null) || \ |
| echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'" >&2 )) || true |
| $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)" |
| |
| $(BPF_IN_STATIC): force elfdep bpfdep |
| $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(STATIC_OBJDIR) |
| |
| $(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION) |
| |
| $(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN_SHARED) |
| $(QUIET_LINK)$(CC) --shared -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \ |
| -Wl,--version-script=$(VERSION_SCRIPT) $^ -lelf -o $@ |
| @ln -sf $(@F) $(OUTPUT)libbpf.so |
| @ln -sf $(@F) $(OUTPUT)libbpf.so.$(LIBBPF_MAJOR_VERSION) |
| |
| $(OUTPUT)libbpf.a: $(BPF_IN_STATIC) |
| $(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^ |
| |
| $(OUTPUT)test_libbpf: test_libbpf.cpp $(OUTPUT)libbpf.a |
| $(QUIET_LINK)$(CXX) $(INCLUDES) $^ -lelf -o $@ |
| |
| $(OUTPUT)libbpf.pc: |
| $(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \ |
| -e "s|@LIBDIR@|$(libdir_SQ)|" \ |
| -e "s|@VERSION@|$(LIBBPF_VERSION)|" \ |
| < libbpf.pc.template > $@ |
| |
| check: check_abi |
| |
| check_abi: $(OUTPUT)libbpf.so |
| @if [ "$(GLOBAL_SYM_COUNT)" != "$(VERSIONED_SYM_COUNT)" ]; then \ |
| echo "Warning: Num of global symbols in $(BPF_IN_SHARED)" \ |
| "($(GLOBAL_SYM_COUNT)) does NOT match with num of" \ |
| "versioned symbols in $^ ($(VERSIONED_SYM_COUNT))." \ |
| "Please make sure all LIBBPF_API symbols are" \ |
| "versioned in $(VERSION_SCRIPT)." >&2; \ |
| readelf -s --wide $(BPF_IN_SHARED) | \ |
| cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \ |
| sed 's/\[.*\]//' | \ |
| awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'| \ |
| sort -u > $(OUTPUT)libbpf_global_syms.tmp; \ |
| readelf -s --wide $(OUTPUT)libbpf.so | \ |
| grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | \ |
| sort -u > $(OUTPUT)libbpf_versioned_syms.tmp; \ |
| diff -u $(OUTPUT)libbpf_global_syms.tmp \ |
| $(OUTPUT)libbpf_versioned_syms.tmp; \ |
| rm $(OUTPUT)libbpf_global_syms.tmp \ |
| $(OUTPUT)libbpf_versioned_syms.tmp; \ |
| exit 1; \ |
| fi |
| |
| define do_install_mkdir |
| if [ ! -d '$(DESTDIR_SQ)$1' ]; then \ |
| $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \ |
| fi |
| endef |
| |
| define do_install |
| if [ ! -d '$(DESTDIR_SQ)$2' ]; then \ |
| $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \ |
| fi; \ |
| $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2' |
| endef |
| |
| install_lib: all_cmd |
| $(call QUIET_INSTALL, $(LIB_TARGET)) \ |
| $(call do_install_mkdir,$(libdir_SQ)); \ |
| cp -fpR $(LIB_FILE) $(DESTDIR)$(libdir_SQ) |
| |
| install_headers: |
| $(call QUIET_INSTALL, headers) \ |
| $(call do_install,bpf.h,$(prefix)/include/bpf,644); \ |
| $(call do_install,libbpf.h,$(prefix)/include/bpf,644); \ |
| $(call do_install,btf.h,$(prefix)/include/bpf,644); \ |
| $(call do_install,libbpf_util.h,$(prefix)/include/bpf,644); \ |
| $(call do_install,xsk.h,$(prefix)/include/bpf,644); |
| |
| install_pkgconfig: $(PC_FILE) |
| $(call QUIET_INSTALL, $(PC_FILE)) \ |
| $(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644) |
| |
| install: install_lib install_pkgconfig |
| |
| ### Cleaning rules |
| |
| config-clean: |
| $(call QUIET_CLEAN, config) |
| $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null |
| |
| clean: |
| $(call QUIET_CLEAN, libbpf) $(RM) -rf $(TARGETS) $(CXX_TEST_TARGET) \ |
| *.o *~ *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) .*.d .*.cmd \ |
| *.pc LIBBPF-CFLAGS $(SHARED_OBJDIR) $(STATIC_OBJDIR) |
| $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf |
| |
| |
| |
| PHONY += force elfdep bpfdep |
| force: |
| |
| elfdep: |
| @if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit 1 ; fi |
| |
| bpfdep: |
| @if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit 1 ; fi |
| |
| # Declare the contents of the .PHONY variable as phony. We keep that |
| # information in a variable so we can use it in if_changed and friends. |
| .PHONY: $(PHONY) |
