1# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) 2 3ifeq ($(V),1) 4 Q = 5 msg = 6else 7 Q = @ 8 msg = @printf ' %-8s %s%s\n' "$(1)" "$(2)" "$(if $(3), $(3))"; 9endif 10 11LIBBPF_MAJOR_VERSION := 1 12LIBBPF_MINOR_VERSION := 1 13LIBBPF_PATCH_VERSION := 0 14LIBBPF_VERSION := $(LIBBPF_MAJOR_VERSION).$(LIBBPF_MINOR_VERSION).$(LIBBPF_PATCH_VERSION) 15LIBBPF_MAJMIN_VERSION := $(LIBBPF_MAJOR_VERSION).$(LIBBPF_MINOR_VERSION).0 16LIBBPF_MAP_VERSION := $(shell grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | sort -rV | head -n1 | cut -d'_' -f2) 17ifneq ($(LIBBPF_MAJMIN_VERSION), $(LIBBPF_MAP_VERSION)) 18$(error Libbpf release ($(LIBBPF_VERSION)) and map ($(LIBBPF_MAP_VERSION)) versions are out of sync!) 19endif 20 21define allow-override 22 $(if $(or $(findstring environment,$(origin $(1))),\ 23 $(findstring command line,$(origin $(1)))),,\ 24 $(eval $(1) = $(2))) 25endef 26 27$(call allow-override,CC,$(CROSS_COMPILE)cc) 28$(call allow-override,LD,$(CROSS_COMPILE)ld) 29 30TOPDIR = .. 31 32INCLUDES := -I. -I$(TOPDIR)/include -I$(TOPDIR)/include/uapi 33ALL_CFLAGS := $(INCLUDES) 34 35SHARED_CFLAGS += -fPIC -fvisibility=hidden -DSHARED 36 37CFLAGS ?= -g -O2 -Werror -Wall -std=gnu89 38ALL_CFLAGS += $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 $(EXTRA_CFLAGS) 39ALL_LDFLAGS += $(LDFLAGS) $(EXTRA_LDFLAGS) 40 41ifdef NO_PKG_CONFIG 42 ALL_LDFLAGS += -lelf -lz 43else 44 PKG_CONFIG ?= pkg-config 45 ALL_CFLAGS += $(shell $(PKG_CONFIG) --cflags libelf zlib) 46 ALL_LDFLAGS += $(shell $(PKG_CONFIG) --libs libelf zlib) 47endif 48 49OBJDIR ?= . 50SHARED_OBJDIR := $(OBJDIR)/sharedobjs 51STATIC_OBJDIR := $(OBJDIR)/staticobjs 52OBJS := bpf.o btf.o libbpf.o libbpf_errno.o netlink.o \ 53 nlattr.o str_error.o libbpf_probes.o bpf_prog_linfo.o \ 54 btf_dump.o hashmap.o ringbuf.o strset.o linker.o gen_loader.o \ 55 relo_core.o usdt.o 56SHARED_OBJS := $(addprefix $(SHARED_OBJDIR)/,$(OBJS)) 57STATIC_OBJS := $(addprefix $(STATIC_OBJDIR)/,$(OBJS)) 58 59STATIC_LIBS := $(OBJDIR)/libbpf.a 60ifndef BUILD_STATIC_ONLY 61 SHARED_LIBS := $(OBJDIR)/libbpf.so \ 62 $(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION) \ 63 $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION) 64 VERSION_SCRIPT := libbpf.map 65endif 66 67HEADERS := bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h \ 68 bpf_helpers.h bpf_helper_defs.h bpf_tracing.h \ 69 bpf_endian.h bpf_core_read.h skel_internal.h libbpf_version.h \ 70 usdt.bpf.h 71UAPI_HEADERS := $(addprefix $(TOPDIR)/include/uapi/linux/,\ 72 bpf.h bpf_common.h btf.h) 73 74PC_FILE := $(OBJDIR)/libbpf.pc 75 76INSTALL = install 77 78DESTDIR ?= 79 80HOSTARCH = $(firstword $(subst -, ,$(shell $(CC) -dumpmachine))) 81ifeq ($(filter-out %64 %64be %64eb %64le %64el s390x, $(HOSTARCH)),) 82 LIBSUBDIR := lib64 83else 84 LIBSUBDIR := lib 85endif 86 87# By default let the pc file itself use ${prefix} in includedir/libdir so that 88# the prefix can be overridden at runtime (eg: --define-prefix) 89ifndef LIBDIR 90 LIBDIR_PC := $$\{prefix\}/$(LIBSUBDIR) 91else 92 LIBDIR_PC := $(LIBDIR) 93endif 94PREFIX ?= /usr 95LIBDIR ?= $(PREFIX)/$(LIBSUBDIR) 96INCLUDEDIR ?= $(PREFIX)/include 97UAPIDIR ?= $(PREFIX)/include 98 99TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags) 100 101all: $(STATIC_LIBS) $(SHARED_LIBS) $(PC_FILE) 102 103$(OBJDIR)/libbpf.a: $(STATIC_OBJS) 104 $(call msg,AR,$@) 105 $(Q)$(AR) rcs $@ $^ 106 107$(OBJDIR)/libbpf.so: $(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION) 108 $(Q)ln -sf $(^F) $@ 109 110$(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION): $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION) 111 $(Q)ln -sf $(^F) $@ 112 113$(OBJDIR)/libbpf.so.$(LIBBPF_VERSION): $(SHARED_OBJS) 114 $(call msg,CC,$@) 115 $(Q)$(CC) -shared -Wl,--version-script=$(VERSION_SCRIPT) \ 116 -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \ 117 $^ $(ALL_LDFLAGS) -o $@ 118 119$(OBJDIR)/libbpf.pc: force 120 $(Q)sed -e "s|@PREFIX@|$(PREFIX)|" \ 121 -e "s|@LIBDIR@|$(LIBDIR_PC)|" \ 122 -e "s|@VERSION@|$(LIBBPF_VERSION)|" \ 123 < libbpf.pc.template > $@ 124 125$(STATIC_OBJDIR) $(SHARED_OBJDIR): 126 $(call msg,MKDIR,$@) 127 $(Q)mkdir -p $@ 128 129$(STATIC_OBJDIR)/%.o: %.c | $(STATIC_OBJDIR) 130 $(call msg,CC,$@) 131 $(Q)$(CC) $(ALL_CFLAGS) $(CPPFLAGS) -c $< -o $@ 132 133$(SHARED_OBJDIR)/%.o: %.c | $(SHARED_OBJDIR) 134 $(call msg,CC,$@) 135 $(Q)$(CC) $(ALL_CFLAGS) $(SHARED_CFLAGS) $(CPPFLAGS) -c $< -o $@ 136 137define do_install 138 $(call msg,INSTALL,$1) 139 $(Q)if [ ! -d '$(DESTDIR)$2' ]; then \ 140 $(INSTALL) -d -m 755 '$(DESTDIR)$2'; \ 141 fi; 142 $(Q)$(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR)$2' 143endef 144 145# Preserve symlinks at installation. 146define do_s_install 147 $(call msg,INSTALL,$1) 148 $(Q)if [ ! -d '$(DESTDIR)$2' ]; then \ 149 $(INSTALL) -d -m 755 '$(DESTDIR)$2'; \ 150 fi; 151 $(Q)cp -fR $1 '$(DESTDIR)$2' 152endef 153 154install: all install_headers install_pkgconfig 155 $(call do_s_install,$(STATIC_LIBS) $(SHARED_LIBS),$(LIBDIR)) 156 157install_headers: 158 $(call do_install,$(HEADERS),$(INCLUDEDIR)/bpf,644) 159 160# UAPI headers can be installed by a different package so they're not installed 161# in by install rule. 162install_uapi_headers: 163 $(call do_install,$(UAPI_HEADERS),$(UAPIDIR)/linux,644) 164 165install_pkgconfig: $(PC_FILE) 166 $(call do_install,$(PC_FILE),$(LIBDIR)/pkgconfig,644) 167 168clean: 169 $(call msg,CLEAN) 170 $(Q)rm -rf *.o *.a *.so *.so.* *.pc $(SHARED_OBJDIR) $(STATIC_OBJDIR) 171 172.PHONY: cscope tags force 173cscope: 174 $(call msg,CSCOPE) 175 $(Q)ls *.c *.h > cscope.files 176 $(Q)cscope -b -q -f cscope.out 177 178tags: 179 $(call msg,CTAGS) 180 $(Q)rm -f TAGS tags 181 $(Q)ls *.c *.h | xargs $(TAGS_PROG) -a 182 183force: 184