254 lines
7.6 KiB
Makefile
254 lines
7.6 KiB
Makefile
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
|
|
# Most of this file is copied from tools/lib/traceevent/Makefile
|
|
|
|
BPF_VERSION = 0
|
|
BPF_PATCHLEVEL = 0
|
|
BPF_EXTRAVERSION = 2
|
|
|
|
MAKEFLAGS += --no-print-directory
|
|
|
|
ifeq ($(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$(srctree)/tools/arch/$(ARCH)/include/uapi -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))
|
|
|
|
VERSION = $(BPF_VERSION)
|
|
PATCHLEVEL = $(BPF_PATCHLEVEL)
|
|
EXTRAVERSION = $(BPF_EXTRAVERSION)
|
|
|
|
OBJ = $@
|
|
N =
|
|
|
|
LIBBPF_VERSION = $(BPF_VERSION).$(BPF_PATCHLEVEL).$(BPF_EXTRAVERSION)
|
|
|
|
LIB_TARGET = libbpf.a libbpf.so.$(LIBBPF_VERSION)
|
|
LIB_FILE = libbpf.a libbpf.so*
|
|
|
|
# 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 += $(INCLUDES)
|
|
override CFLAGS += -fvisibility=hidden
|
|
|
|
ifeq ($(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
|
|
|
|
BPF_IN := $(OUTPUT)libbpf-in.o
|
|
VERSION_SCRIPT := libbpf.map
|
|
|
|
LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
|
|
LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
|
|
|
|
GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN) | \
|
|
awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {s++} END{print s}')
|
|
VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \
|
|
grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)
|
|
|
|
CMD_TARGETS = $(LIB_TARGET)
|
|
|
|
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): 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)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION)
|
|
|
|
$(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN)
|
|
$(QUIET_LINK)$(CC) --shared -Wl,-soname,libbpf.so.$(VERSION) \
|
|
-Wl,--version-script=$(VERSION_SCRIPT) $^ -lelf -o $@
|
|
@ln -sf $(@F) $(OUTPUT)libbpf.so
|
|
@ln -sf $(@F) $(OUTPUT)libbpf.so.$(VERSION)
|
|
|
|
$(OUTPUT)libbpf.a: $(BPF_IN)
|
|
$(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
|
|
|
|
$(OUTPUT)test_libbpf: test_libbpf.cpp $(OUTPUT)libbpf.a
|
|
$(QUIET_LINK)$(CXX) $(INCLUDES) $^ -lelf -o $@
|
|
|
|
check: check_abi
|
|
|
|
check_abi: $(OUTPUT)libbpf.so
|
|
@if [ "$(GLOBAL_SYM_COUNT)" != "$(VERSIONED_SYM_COUNT)" ]; then \
|
|
echo "Warning: Num of global symbols in $(BPF_IN)" \
|
|
"($(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 $(VERSION_SCRIPT)." >&2; \
|
|
exit 1; \
|
|
fi
|
|
|
|
define do_install_mkdir
|
|
if [ ! -d '$(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) $1 $(if $3,-m $3,) '$(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); \
|
|
$(call do_install,xsk.h,$(prefix)/include/bpf,644);
|
|
|
|
install: install_lib
|
|
|
|
### Cleaning rules
|
|
|
|
config-clean:
|
|
$(call QUIET_CLEAN, config)
|
|
$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
|
|
|
|
clean:
|
|
$(call QUIET_CLEAN, libbpf) $(RM) $(TARGETS) $(CXX_TEST_TARGET) \
|
|
*.o *~ *.a *.so *.so.$(VERSION) .*.d .*.cmd LIBBPF-CFLAGS
|
|
$(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)
|