mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-28 13:22:57 +00:00
29a9c10e41
Make it possible to build bpftool without libbfd. libbfd and libopcodes are typically provided in dev/dbg packages (binutils-dev in debian) which we usually don't have installed on the fleet machines and we'd like a way to have bpftool version that works without installing any additional packages. This excludes support for disassembling jit-ted code and prints an error if the user tries to use these features. Tested by: cat > FEATURES_DUMP.bpftool <<EOF feature-libbfd=0 feature-disassembler-four-args=1 feature-reallocarray=0 feature-libelf=1 feature-libelf-mmap=1 feature-bpf=1 EOF FEATURES_DUMP=$PWD/FEATURES_DUMP.bpftool make ldd bpftool | grep libbfd Signed-off-by: Stanislav Fomichev <sdf@google.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
148 lines
3.4 KiB
Makefile
148 lines
3.4 KiB
Makefile
include ../../scripts/Makefile.include
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include ../../scripts/utilities.mak
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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endif
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ifeq ($(V),1)
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Q =
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else
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Q = @
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endif
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BPF_DIR = $(srctree)/tools/lib/bpf/
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ifneq ($(OUTPUT),)
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BPF_PATH = $(OUTPUT)
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else
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BPF_PATH = $(BPF_DIR)
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endif
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LIBBPF = $(BPF_PATH)libbpf.a
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BPFTOOL_VERSION := $(shell make --no-print-directory -sC ../../.. kernelversion)
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$(LIBBPF): FORCE
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$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(OUTPUT) $(OUTPUT)libbpf.a
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$(LIBBPF)-clean:
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$(call QUIET_CLEAN, libbpf)
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$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(OUTPUT) clean >/dev/null
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prefix ?= /usr/local
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bash_compdir ?= /usr/share/bash-completion/completions
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CC = gcc
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CFLAGS += -O2
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CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wshadow -Wno-missing-field-initializers
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CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
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-I$(srctree)/kernel/bpf/ \
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-I$(srctree)/tools/include \
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-I$(srctree)/tools/include/uapi \
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-I$(srctree)/tools/lib/bpf \
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-I$(srctree)/tools/perf
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CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
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ifneq ($(EXTRA_CFLAGS),)
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CFLAGS += $(EXTRA_CFLAGS)
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endif
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ifneq ($(EXTRA_LDFLAGS),)
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LDFLAGS += $(EXTRA_LDFLAGS)
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endif
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LIBS = -lelf $(LIBBPF)
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INSTALL ?= install
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RM ?= rm -f
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FEATURE_USER = .bpftool
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FEATURE_TESTS = libbfd disassembler-four-args reallocarray
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FEATURE_DISPLAY = libbfd disassembler-four-args
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check_feat := 1
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NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
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ifdef MAKECMDGOALS
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ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
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check_feat := 0
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endif
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endif
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ifeq ($(check_feat),1)
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ifeq ($(FEATURES_DUMP),)
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include $(srctree)/tools/build/Makefile.feature
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else
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include $(FEATURES_DUMP)
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endif
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endif
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ifeq ($(feature-disassembler-four-args), 1)
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CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
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endif
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ifeq ($(feature-reallocarray), 0)
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CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
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endif
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include $(wildcard $(OUTPUT)*.d)
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all: $(OUTPUT)bpftool
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BFD_SRCS = jit_disasm.c
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SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
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ifeq ($(feature-libbfd),1)
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CFLAGS += -DHAVE_LIBBFD_SUPPORT
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SRCS += $(BFD_SRCS)
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LIBS += -lbfd -lopcodes
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endif
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OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
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$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
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$(QUIET_CC)$(COMPILE.c) -MMD -o $@ $<
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$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
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$(OUTPUT)%.o: %.c
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$(QUIET_CC)$(COMPILE.c) -MMD -o $@ $<
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clean: $(LIBBPF)-clean
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$(call QUIET_CLEAN, bpftool)
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$(Q)$(RM) $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
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$(call QUIET_CLEAN, core-gen)
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$(Q)$(RM) $(OUTPUT)FEATURE-DUMP.bpftool
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install: $(OUTPUT)bpftool
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$(call QUIET_INSTALL, bpftool)
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$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
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$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
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$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
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$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
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uninstall:
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$(call QUIET_UNINST, bpftool)
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$(Q)$(RM) $(DESTDIR)$(prefix)/sbin/bpftool
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$(Q)$(RM) $(DESTDIR)$(bash_compdir)/bpftool
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doc:
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$(call descend,Documentation)
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doc-clean:
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$(call descend,Documentation,clean)
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doc-install:
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$(call descend,Documentation,install)
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doc-uninstall:
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$(call descend,Documentation,uninstall)
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FORCE:
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.PHONY: all FORCE clean install uninstall
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.PHONY: doc doc-clean doc-install doc-uninstall
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.DEFAULT_GOAL := all
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