219 lines
5.5 KiB
Makefile
219 lines
5.5 KiB
Makefile
# Most of this file is copied from tools/lib/traceevent/Makefile
|
|
|
|
BPF_VERSION = 0
|
|
BPF_PATCHLEVEL = 0
|
|
BPF_EXTRAVERSION = 1
|
|
|
|
MAKEFLAGS += --no-print-directory
|
|
|
|
ifeq ($(srctree),)
|
|
srctree := $(patsubst %/,%,$(dir $(shell pwd)))
|
|
srctree := $(patsubst %/,%,$(dir $(srctree)))
|
|
srctree := $(patsubst %/,%,$(dir $(srctree)))
|
|
#$(info Determined 'srctree' to be $(srctree))
|
|
endif
|
|
|
|
# Makefiles suck: This macro sets a default value of $(2) for the
|
|
# variable named by $(1), unless the variable has been set by
|
|
# environment or command line. This is necessary for CC and AR
|
|
# because make sets default values, so the simpler ?= approach
|
|
# won't work as expected.
|
|
define allow-override
|
|
$(if $(or $(findstring environment,$(origin $(1))),\
|
|
$(findstring command line,$(origin $(1)))),,\
|
|
$(eval $(1) = $(2)))
|
|
endef
|
|
|
|
# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
|
|
$(call allow-override,CC,$(CROSS_COMPILE)gcc)
|
|
$(call allow-override,AR,$(CROSS_COMPILE)ar)
|
|
|
|
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 ','\'',$(man_dir))'
|
|
|
|
export man_dir man_dir_SQ INSTALL
|
|
export DESTDIR DESTDIR_SQ
|
|
|
|
include ../../scripts/Makefile.include
|
|
|
|
# copy a bit from Linux kbuild
|
|
|
|
ifeq ("$(origin V)", "command line")
|
|
VERBOSE = $(V)
|
|
endif
|
|
ifndef VERBOSE
|
|
VERBOSE = 0
|
|
endif
|
|
|
|
FEATURE_USER = .libbpf
|
|
FEATURE_TESTS = libelf libelf-getphdrnum libelf-mmap bpf
|
|
FEATURE_DISPLAY = libelf bpf
|
|
|
|
INCLUDES = -I. -I$(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))
|
|
plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
|
|
|
|
LIB_FILE = libbpf.a libbpf.so
|
|
|
|
VERSION = $(BPF_VERSION)
|
|
PATCHLEVEL = $(BPF_PATCHLEVEL)
|
|
EXTRAVERSION = $(BPF_EXTRAVERSION)
|
|
|
|
OBJ = $@
|
|
N =
|
|
|
|
LIBBPF_VERSION = $(BPF_VERSION).$(BPF_PATCHLEVEL).$(BPF_EXTRAVERSION)
|
|
|
|
# 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-libelf-getphdrnum), 1)
|
|
override CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT
|
|
endif
|
|
|
|
# Append required CFLAGS
|
|
override CFLAGS += $(EXTRA_WARNINGS)
|
|
override CFLAGS += -Werror -Wall
|
|
override CFLAGS += -fPIC
|
|
override CFLAGS += $(INCLUDES)
|
|
|
|
ifeq ($(VERBOSE),1)
|
|
Q =
|
|
else
|
|
Q = @
|
|
endif
|
|
|
|
# Disable command line variables (CFLAGS) overide 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
|
|
LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
|
|
|
|
CMD_TARGETS = $(LIB_FILE)
|
|
|
|
TARGETS = $(CMD_TARGETS)
|
|
|
|
all: fixdep $(VERSION_FILES) all_cmd
|
|
|
|
all_cmd: $(CMD_TARGETS)
|
|
|
|
$(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: tools/include/uapi/linux/bpf.h differs from kernel" >&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: tools/include/uapi/linux/bpf_common.h differs from kernel" >&2 )) || true
|
|
$(Q)$(MAKE) $(build)=libbpf
|
|
|
|
$(OUTPUT)libbpf.so: $(BPF_IN)
|
|
$(QUIET_LINK)$(CC) --shared $^ -o $@
|
|
|
|
$(OUTPUT)libbpf.a: $(BPF_IN)
|
|
$(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
|
|
|
|
define update_dir
|
|
(echo $1 > $@.tmp; \
|
|
if [ -r $@ ] && cmp -s $@ $@.tmp; then \
|
|
rm -f $@.tmp; \
|
|
else \
|
|
echo ' UPDATE $@'; \
|
|
mv -f $@.tmp $@; \
|
|
fi);
|
|
endef
|
|
|
|
define do_install
|
|
if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
|
|
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
|
|
fi; \
|
|
$(INSTALL) $1 '$(DESTDIR_SQ)$2'
|
|
endef
|
|
|
|
install_lib: all_cmd
|
|
$(call QUIET_INSTALL, $(LIB_FILE)) \
|
|
$(call do_install,$(LIB_FILE),$(libdir_SQ))
|
|
|
|
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) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd \
|
|
$(RM) 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)
|