2f38304127
Turn previously auto-generated libbpf_version.h header into a normal
header file. This prevents various tricky Makefile integration issues,
simplifies the overall build process, but also allows to further extend
it with some more versioning-related APIs in the future.
To prevent accidental out-of-sync versions as defined by libbpf.map and
libbpf_version.h, Makefile checks their consistency at build time.
Simultaneously with this change bump libbpf.map to v0.6.
Also undo adding libbpf's output directory into include path for
kernel/bpf/preload, bpftool, and resolve_btfids, which is not necessary
because libbpf_version.h is just a normal header like any other.
Fixes: 0b46b75505 ("libbpf: Add LIBBPF_DEPRECATED_SINCE macro for scheduling API deprecations")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210913222309.3220849-1-andrii@kernel.org
87 lines
2.2 KiB
Makefile
87 lines
2.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
|
|
include ../../scripts/Makefile.include
|
|
include ../../scripts/Makefile.arch
|
|
|
|
srctree := $(abspath $(CURDIR)/../../../)
|
|
|
|
ifeq ($(V),1)
|
|
Q =
|
|
msg =
|
|
else
|
|
Q = @
|
|
msg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
|
|
MAKEFLAGS=--no-print-directory
|
|
endif
|
|
|
|
# always use the host compiler
|
|
AR = $(HOSTAR)
|
|
CC = $(HOSTCC)
|
|
LD = $(HOSTLD)
|
|
ARCH = $(HOSTARCH)
|
|
RM ?= rm
|
|
|
|
OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/
|
|
|
|
LIBBPF_SRC := $(srctree)/tools/lib/bpf/
|
|
SUBCMD_SRC := $(srctree)/tools/lib/subcmd/
|
|
|
|
BPFOBJ := $(OUTPUT)/libbpf/libbpf.a
|
|
LIBBPF_OUT := $(abspath $(dir $(BPFOBJ)))/
|
|
SUBCMDOBJ := $(OUTPUT)/libsubcmd/libsubcmd.a
|
|
|
|
BINARY := $(OUTPUT)/resolve_btfids
|
|
BINARY_IN := $(BINARY)-in.o
|
|
|
|
all: $(BINARY)
|
|
|
|
$(OUTPUT) $(OUTPUT)/libbpf $(OUTPUT)/libsubcmd:
|
|
$(call msg,MKDIR,,$@)
|
|
$(Q)mkdir -p $(@)
|
|
|
|
$(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
|
|
$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
|
|
|
|
$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)/libbpf
|
|
$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT) $(abspath $@)
|
|
|
|
CFLAGS := -g \
|
|
-I$(srctree)/tools/include \
|
|
-I$(srctree)/tools/include/uapi \
|
|
-I$(LIBBPF_SRC) \
|
|
-I$(SUBCMD_SRC)
|
|
|
|
LIBS = -lelf -lz
|
|
|
|
export srctree OUTPUT CFLAGS Q
|
|
include $(srctree)/tools/build/Makefile.include
|
|
|
|
$(BINARY_IN): $(BPFOBJ) fixdep FORCE | $(OUTPUT)
|
|
$(Q)$(MAKE) $(build)=resolve_btfids
|
|
|
|
$(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
|
|
$(call msg,LINK,$@)
|
|
$(Q)$(CC) $(BINARY_IN) $(LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
|
|
|
|
clean_objects := $(wildcard $(OUTPUT)/*.o \
|
|
$(OUTPUT)/.*.o.cmd \
|
|
$(OUTPUT)/.*.o.d \
|
|
$(OUTPUT)/libbpf \
|
|
$(OUTPUT)/libsubcmd \
|
|
$(OUTPUT)/resolve_btfids)
|
|
|
|
ifneq ($(clean_objects),)
|
|
clean: fixdep-clean
|
|
$(call msg,CLEAN,$(BINARY))
|
|
$(Q)$(RM) -rf $(clean_objects)
|
|
else
|
|
clean:
|
|
endif
|
|
|
|
tags:
|
|
$(call msg,GEN,,tags)
|
|
$(Q)ctags -R . $(LIBBPF_SRC) $(SUBCMD_SRC)
|
|
|
|
FORCE:
|
|
|
|
.PHONY: all FORCE clean tags
|