forked from Minki/linux
292e1d73b1
bpf_helpers_doc.py script, used to generate bpf_helper_defs.h, unconditionally emits one informational message to stderr. Remove it and preserve stderr to contain only relevant errors. Also make sure script invocations command is muted by default in libbpf's Makefile. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200113073143.1779940-3-andriin@fb.com
311 lines
10 KiB
Makefile
311 lines
10 KiB
Makefile
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
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# Most of this file is copied from tools/lib/traceevent/Makefile
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LIBBPF_VERSION := $(shell \
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grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | \
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sort -rV | head -n1 | cut -d'_' -f2)
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LIBBPF_MAJOR_VERSION := $(firstword $(subst ., ,$(LIBBPF_VERSION)))
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MAKEFLAGS += --no-print-directory
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# This will work when bpf is built in tools env. where srctree
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# isn't set and when invoked from selftests build, where srctree
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# is a ".". building_out_of_srctree is undefined for in srctree
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# builds
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ifndef building_out_of_srctree
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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#$(info Determined 'srctree' to be $(srctree))
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endif
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INSTALL = install
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# Use DESTDIR for installing into a different root directory.
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# This is useful for building a package. The program will be
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# installed in this directory as if it was the root directory.
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# Then the build tool can move it later.
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DESTDIR ?=
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DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
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include $(srctree)/tools/scripts/Makefile.arch
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ifeq ($(LP64), 1)
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libdir_relative = lib64
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else
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libdir_relative = lib
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endif
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prefix ?= /usr/local
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libdir = $(prefix)/$(libdir_relative)
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man_dir = $(prefix)/share/man
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man_dir_SQ = '$(subst ','\'',$(man_dir))'
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export man_dir man_dir_SQ INSTALL
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export DESTDIR DESTDIR_SQ
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include $(srctree)/tools/scripts/Makefile.include
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# copy a bit from Linux kbuild
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ifeq ("$(origin V)", "command line")
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VERBOSE = $(V)
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endif
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ifndef VERBOSE
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VERBOSE = 0
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endif
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FEATURE_USER = .libbpf
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FEATURE_TESTS = libelf libelf-mmap zlib bpf reallocarray
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FEATURE_DISPLAY = libelf zlib bpf
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INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/uapi -I$(srctree)/tools/include/uapi
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FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES)
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check_feat := 1
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NON_CHECK_FEAT_TARGETS := clean TAGS tags cscope help
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ifdef MAKECMDGOALS
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ifeq ($(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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export prefix libdir src obj
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# Shell quotes
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libdir_SQ = $(subst ','\'',$(libdir))
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libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
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OBJ = $@
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N =
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LIB_TARGET = libbpf.a libbpf.so.$(LIBBPF_VERSION)
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LIB_FILE = libbpf.a libbpf.so*
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PC_FILE = libbpf.pc
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# Set compile option CFLAGS
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ifdef EXTRA_CFLAGS
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CFLAGS := $(EXTRA_CFLAGS)
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else
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CFLAGS := -g -Wall
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endif
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ifeq ($(feature-libelf-mmap), 1)
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override CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT
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endif
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ifeq ($(feature-reallocarray), 0)
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override CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
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endif
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# Append required CFLAGS
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override CFLAGS += $(EXTRA_WARNINGS)
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override CFLAGS += -Werror -Wall
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override CFLAGS += -fPIC
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override CFLAGS += $(INCLUDES)
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override CFLAGS += -fvisibility=hidden
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override CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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# flags specific for shared library
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SHLIB_FLAGS := -DSHARED
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ifeq ($(VERBOSE),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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# Disable command line variables (CFLAGS) override from top
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# level Makefile (perf), otherwise build Makefile will get
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# the same command line setup.
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MAKEOVERRIDES=
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all:
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export srctree OUTPUT CC LD CFLAGS V
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include $(srctree)/tools/build/Makefile.include
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SHARED_OBJDIR := $(OUTPUT)sharedobjs/
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STATIC_OBJDIR := $(OUTPUT)staticobjs/
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BPF_IN_SHARED := $(SHARED_OBJDIR)libbpf-in.o
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BPF_IN_STATIC := $(STATIC_OBJDIR)libbpf-in.o
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VERSION_SCRIPT := libbpf.map
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BPF_HELPER_DEFS := $(OUTPUT)bpf_helper_defs.h
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LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
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LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
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PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE))
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TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags)
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GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \
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cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \
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sed 's/\[.*\]//' | \
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awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}' | \
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sort -u | wc -l)
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VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \
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grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)
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CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
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all: fixdep
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$(Q)$(MAKE) all_cmd
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all_cmd: $(CMD_TARGETS) check
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$(BPF_IN_SHARED): force elfdep zdep bpfdep $(BPF_HELPER_DEFS)
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@(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \
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(diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \
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echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true
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@(test -f ../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \
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(diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \
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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
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@(test -f ../../include/uapi/linux/netlink.h -a -f ../../../include/uapi/linux/netlink.h && ( \
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(diff -B ../../include/uapi/linux/netlink.h ../../../include/uapi/linux/netlink.h >/dev/null) || \
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echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h'" >&2 )) || true
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@(test -f ../../include/uapi/linux/if_link.h -a -f ../../../include/uapi/linux/if_link.h && ( \
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(diff -B ../../include/uapi/linux/if_link.h ../../../include/uapi/linux/if_link.h >/dev/null) || \
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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
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@(test -f ../../include/uapi/linux/if_xdp.h -a -f ../../../include/uapi/linux/if_xdp.h && ( \
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(diff -B ../../include/uapi/linux/if_xdp.h ../../../include/uapi/linux/if_xdp.h >/dev/null) || \
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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
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$(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)"
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$(BPF_IN_STATIC): force elfdep zdep bpfdep $(BPF_HELPER_DEFS)
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$(Q)$(MAKE) $(build)=libbpf OUTPUT=$(STATIC_OBJDIR)
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$(BPF_HELPER_DEFS): $(srctree)/tools/include/uapi/linux/bpf.h
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$(QUIET_GEN)$(srctree)/scripts/bpf_helpers_doc.py --header \
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--file $(srctree)/tools/include/uapi/linux/bpf.h > $(BPF_HELPER_DEFS)
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$(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION)
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$(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN_SHARED)
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$(QUIET_LINK)$(CC) $(LDFLAGS) \
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--shared -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \
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-Wl,--version-script=$(VERSION_SCRIPT) $^ -lelf -lz -o $@
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@ln -sf $(@F) $(OUTPUT)libbpf.so
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@ln -sf $(@F) $(OUTPUT)libbpf.so.$(LIBBPF_MAJOR_VERSION)
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$(OUTPUT)libbpf.a: $(BPF_IN_STATIC)
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$(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
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$(OUTPUT)libbpf.pc:
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$(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
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-e "s|@LIBDIR@|$(libdir_SQ)|" \
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-e "s|@VERSION@|$(LIBBPF_VERSION)|" \
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< libbpf.pc.template > $@
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check: check_abi
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check_abi: $(OUTPUT)libbpf.so
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@if [ "$(GLOBAL_SYM_COUNT)" != "$(VERSIONED_SYM_COUNT)" ]; then \
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echo "Warning: Num of global symbols in $(BPF_IN_SHARED)" \
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"($(GLOBAL_SYM_COUNT)) does NOT match with num of" \
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"versioned symbols in $^ ($(VERSIONED_SYM_COUNT))." \
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"Please make sure all LIBBPF_API symbols are" \
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"versioned in $(VERSION_SCRIPT)." >&2; \
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readelf -s --wide $(BPF_IN_SHARED) | \
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cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \
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sed 's/\[.*\]//' | \
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awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'| \
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sort -u > $(OUTPUT)libbpf_global_syms.tmp; \
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readelf -s --wide $(OUTPUT)libbpf.so | \
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grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | \
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sort -u > $(OUTPUT)libbpf_versioned_syms.tmp; \
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diff -u $(OUTPUT)libbpf_global_syms.tmp \
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$(OUTPUT)libbpf_versioned_syms.tmp; \
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rm $(OUTPUT)libbpf_global_syms.tmp \
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$(OUTPUT)libbpf_versioned_syms.tmp; \
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exit 1; \
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fi
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define do_install_mkdir
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if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
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$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
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fi
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endef
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define do_install
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if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
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$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
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fi; \
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$(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR_SQ)$2'
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endef
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install_lib: all_cmd
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$(call QUIET_INSTALL, $(LIB_TARGET)) \
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$(call do_install_mkdir,$(libdir_SQ)); \
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cp -fpR $(LIB_FILE) $(DESTDIR)$(libdir_SQ)
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install_headers: $(BPF_HELPER_DEFS)
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$(call QUIET_INSTALL, headers) \
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$(call do_install,bpf.h,$(prefix)/include/bpf,644); \
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$(call do_install,libbpf.h,$(prefix)/include/bpf,644); \
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$(call do_install,btf.h,$(prefix)/include/bpf,644); \
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$(call do_install,libbpf_util.h,$(prefix)/include/bpf,644); \
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$(call do_install,libbpf_common.h,$(prefix)/include/bpf,644); \
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$(call do_install,xsk.h,$(prefix)/include/bpf,644); \
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$(call do_install,bpf_helpers.h,$(prefix)/include/bpf,644); \
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$(call do_install,$(BPF_HELPER_DEFS),$(prefix)/include/bpf,644); \
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$(call do_install,bpf_tracing.h,$(prefix)/include/bpf,644); \
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$(call do_install,bpf_endian.h,$(prefix)/include/bpf,644); \
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$(call do_install,bpf_core_read.h,$(prefix)/include/bpf,644);
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install_pkgconfig: $(PC_FILE)
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$(call QUIET_INSTALL, $(PC_FILE)) \
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$(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644)
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install: install_lib install_pkgconfig
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### Cleaning rules
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config-clean:
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$(call QUIET_CLEAN, config)
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$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
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clean:
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$(call QUIET_CLEAN, libbpf) $(RM) -rf $(CMD_TARGETS) \
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*~ .*.d .*.cmd LIBBPF-CFLAGS $(BPF_HELPER_DEFS) \
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$(SHARED_OBJDIR) $(STATIC_OBJDIR) \
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$(addprefix $(OUTPUT), \
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*.o *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) *.pc)
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$(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf
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PHONY += force elfdep zdep bpfdep cscope tags
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force:
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elfdep:
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@if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit 1 ; fi
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zdep:
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@if [ "$(feature-zlib)" != "1" ]; then echo "No zlib found"; exit 1 ; fi
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bpfdep:
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@if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit 1 ; fi
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cscope:
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ls *.c *.h > cscope.files
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cscope -b -q -I $(srctree)/include -f cscope.out
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tags:
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rm -f TAGS tags
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ls *.c *.h | xargs $(TAGS_PROG) -a
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# Declare the contents of the .PHONY variable as phony. We keep that
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# information in a variable so we can use it in if_changed and friends.
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.PHONY: $(PHONY)
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# Delete partially updated (corrupted) files on error
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.DELETE_ON_ERROR:
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