| # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) |
| # Most of this file is copied from tools/lib/traceevent/Makefile |
| |
| RM ?= rm |
| srctree := $(realpath $(srctree)) |
| |
| VERSION_SCRIPT := libbpf.map |
| LIBBPF_VERSION := $(shell \ |
| grep -oE '^LIBBPF_([0-9.]+)' $(VERSION_SCRIPT) | \ |
| sort -rV | head -n1 | cut -d'_' -f2) |
| LIBBPF_MAJOR_VERSION := $(word 1,$(subst ., ,$(LIBBPF_VERSION))) |
| LIBBPF_MINOR_VERSION := $(word 2,$(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 $(srctree)/tools/scripts/Makefile.include |
| |
| # copy a bit from Linux kbuild |
| |
| INCLUDES = -I$(or $(OUTPUT),.) \ |
| -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi \ |
| -I$(srctree)/tools/arch/$(SRCARCH)/include |
| |
| 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 -O2 |
| endif |
| |
| # Append required CFLAGS |
| override CFLAGS += -std=gnu89 |
| override CFLAGS += $(EXTRA_WARNINGS) -Wno-switch-enum |
| override CFLAGS += -Werror -Wall |
| override CFLAGS += $(INCLUDES) |
| override CFLAGS += -fvisibility=hidden |
| override CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 |
| override CFLAGS += $(CLANG_CROSS_FLAGS) |
| |
| # flags specific for shared library |
| SHLIB_FLAGS := -DSHARED -fPIC |
| |
| # Disable command line variables (CFLAGS) override from top |
| # level Makefile (perf), otherwise build Makefile will get |
| # the same command line setup. |
| MAKEOVERRIDES= |
| |
| all: |
| |
| OUTPUT ?= ./ |
| OUTPUT := $(abspath $(OUTPUT))/ |
| 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 |
| BPF_HELPER_DEFS := $(OUTPUT)bpf_helper_defs.h |
| BPF_GENERATED := $(BPF_HELPER_DEFS) |
| |
| LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET)) |
| LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE)) |
| PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE)) |
| |
| TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags) |
| |
| 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|ABS/ {print $$NF}' | \ |
| sort -u | wc -l) |
| VERSIONED_SYM_COUNT = $(shell readelf --dyn-syms --wide $(OUTPUT)libbpf.so | \ |
| sed 's/\[.*\]//' | \ |
| awk '/GLOBAL/ && /DEFAULT/ && !/UND|ABS/ {print $$NF}' | \ |
| grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l) |
| |
| CMD_TARGETS = $(LIB_TARGET) $(PC_FILE) |
| |
| all: fixdep |
| $(Q)$(MAKE) all_cmd |
| |
| all_cmd: $(CMD_TARGETS) check |
| |
| $(SHARED_OBJDIR) $(STATIC_OBJDIR): |
| $(Q)mkdir -p $@ |
| |
| $(BPF_IN_SHARED): force $(BPF_GENERATED) | $(SHARED_OBJDIR) |
| @(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/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 |
| $(SILENT_MAKE) -C $(srctree)/tools/build CFLAGS= LDFLAGS= OUTPUT=$(SHARED_OBJDIR) $(SHARED_OBJDIR)fixdep |
| $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)" |
| |
| $(BPF_IN_STATIC): force $(BPF_GENERATED) | $(STATIC_OBJDIR) |
| $(SILENT_MAKE) -C $(srctree)/tools/build CFLAGS= LDFLAGS= OUTPUT=$(STATIC_OBJDIR) $(STATIC_OBJDIR)fixdep |
| $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(STATIC_OBJDIR) |
| |
| $(BPF_HELPER_DEFS): $(srctree)/tools/include/uapi/linux/bpf.h |
| $(QUIET_GEN)$(srctree)/scripts/bpf_doc.py --header \ |
| --file $(srctree)/tools/include/uapi/linux/bpf.h > $(BPF_HELPER_DEFS) |
| |
| $(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION) |
| |
| $(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN_SHARED) $(VERSION_SCRIPT) |
| $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) \ |
| --shared -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \ |
| -Wl,--version-script=$(VERSION_SCRIPT) $< -lelf -lz -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) -f $@; $(AR) rcs $@ $^ |
| |
| $(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_version |
| |
| check_abi: $(OUTPUT)libbpf.so $(VERSION_SCRIPT) |
| @if [ "$(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 --dyn-syms --wide $(OUTPUT)libbpf.so | \ |
| sed 's/\[.*\]//' | \ |
| awk '/GLOBAL/ && /DEFAULT/ && !/UND|ABS/ {print $$NF}'| \ |
| grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | \ |
| sort -u > $(OUTPUT)libbpf_versioned_syms.tmp; \ |
| diff -u $(OUTPUT)libbpf_global_syms.tmp \ |
| $(OUTPUT)libbpf_versioned_syms.tmp; \ |
| rm $(OUTPUT)libbpf_global_syms.tmp \ |
| $(OUTPUT)libbpf_versioned_syms.tmp; \ |
| exit 1; \ |
| fi |
| |
| HDR_MAJ_VERSION := $(shell grep -oE '^$(pound)define LIBBPF_MAJOR_VERSION ([0-9]+)$$' libbpf_version.h | cut -d' ' -f3) |
| HDR_MIN_VERSION := $(shell grep -oE '^$(pound)define LIBBPF_MINOR_VERSION ([0-9]+)$$' libbpf_version.h | cut -d' ' -f3) |
| |
| check_version: $(VERSION_SCRIPT) libbpf_version.h |
| @if [ "$(HDR_MAJ_VERSION)" != "$(LIBBPF_MAJOR_VERSION)" ]; then \ |
| echo "Error: libbpf major version mismatch detected: " \ |
| "'$(HDR_MAJ_VERSION)' != '$(LIBBPF_MAJOR_VERSION)'" >&2; \ |
| exit 1; \ |
| fi |
| @if [ "$(HDR_MIN_VERSION)" != "$(LIBBPF_MINOR_VERSION)" ]; then \ |
| echo "Error: libbpf minor version mismatch detected: " \ |
| "'$(HDR_MIN_VERSION)' != '$(LIBBPF_MINOR_VERSION)'" >&2; \ |
| exit 1; \ |
| fi |
| |
| define do_install_mkdir |
| if [ ! -d '$(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) |
| |
| SRC_HDRS := bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h \ |
| bpf_helpers.h bpf_tracing.h bpf_endian.h bpf_core_read.h \ |
| skel_internal.h libbpf_version.h usdt.bpf.h |
| GEN_HDRS := $(BPF_GENERATED) |
| |
| INSTALL_PFX := $(DESTDIR)$(prefix)/include/bpf |
| INSTALL_SRC_HDRS := $(addprefix $(INSTALL_PFX)/, $(SRC_HDRS)) |
| INSTALL_GEN_HDRS := $(addprefix $(INSTALL_PFX)/, $(notdir $(GEN_HDRS))) |
| |
| $(INSTALL_SRC_HDRS): $(INSTALL_PFX)/%.h: %.h |
| $(call QUIET_INSTALL, $@) \ |
| $(call do_install,$<,$(prefix)/include/bpf,644) |
| |
| $(INSTALL_GEN_HDRS): $(INSTALL_PFX)/%.h: $(OUTPUT)%.h |
| $(call QUIET_INSTALL, $@) \ |
| $(call do_install,$<,$(prefix)/include/bpf,644) |
| |
| install_headers: $(BPF_GENERATED) $(INSTALL_SRC_HDRS) $(INSTALL_GEN_HDRS) |
| $(call QUIET_INSTALL, libbpf_headers) |
| |
| install_pkgconfig: $(PC_FILE) |
| $(call QUIET_INSTALL, $(PC_FILE)) \ |
| $(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644) |
| |
| install: install_lib install_pkgconfig install_headers |
| |
| clean: fixdep-clean |
| $(call QUIET_CLEAN, libbpf) $(RM) -rf $(CMD_TARGETS) \ |
| *~ .*.d .*.cmd LIBBPF-CFLAGS $(BPF_GENERATED) \ |
| $(SHARED_OBJDIR) $(STATIC_OBJDIR) \ |
| $(addprefix $(OUTPUT), \ |
| *.o *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) *.pc) |
| |
| PHONY += force cscope tags check check_abi check_version |
| force: |
| |
| cscope: |
| ls *.c *.h > cscope.files |
| cscope -b -q -I $(srctree)/include -f cscope.out |
| |
| tags: |
| $(RM) -f TAGS tags |
| ls *.c *.h | xargs $(TAGS_PROG) -a |
| |
| # 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) |
| |
| # Delete partially updated (corrupted) files on error |
| .DELETE_ON_ERROR: |
| |
| help: |
| @echo 'libbpf common targets:' |
| @echo ' HINT: use "V=1" to enable verbose build' |
| @echo ' all - build libraries and pkgconfig' |
| @echo ' clean - remove all generated files' |
| @echo ' check - check ABI and version info' |
| @echo '' |
| @echo 'libbpf install targets:' |
| @echo ' HINT: use "prefix"(defaults to "/usr/local") or "DESTDIR" (defaults to "/")' |
| @echo ' to adjust target destination, e.g. "make prefix=/usr/local install"' |
| @echo ' install - build and install all headers, libraries and pkgconfig' |
| @echo ' install_headers - install only headers to include/bpf' |
| @echo '' |
| @echo 'libbpf make targets:' |
| @echo ' tags - use ctags to make tag information for source code browsing' |
| @echo ' cscope - use cscope to make interactive source code browsing database' |
