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7c422f5572
Adding the fixdep target into the Makefile.include to ease up building of fixdep helper, that needs to be built before we dive in to the build itself. The user can invoke the fixdep target to build the helper. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-8-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
199 lines
4.7 KiB
Makefile
199 lines
4.7 KiB
Makefile
# Most of this file is copied from tools/lib/traceevent/Makefile
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BPF_VERSION = 0
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BPF_PATCHLEVEL = 0
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BPF_EXTRAVERSION = 1
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MAKEFLAGS += --no-print-directory
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# Makefiles suck: This macro sets a default value of $(2) for the
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# variable named by $(1), unless the variable has been set by
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# environment or command line. This is necessary for CC and AR
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# because make sets default values, so the simpler ?= approach
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# won't work as expected.
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define allow-override
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$(if $(or $(findstring environment,$(origin $(1))),\
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$(findstring command line,$(origin $(1)))),,\
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$(eval $(1) = $(2)))
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endef
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# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
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$(call allow-override,CC,$(CROSS_COMPILE)gcc)
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$(call allow-override,AR,$(CROSS_COMPILE)ar)
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INSTALL = install
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# Use DESTDIR for installing into a different root directory.
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# This is useful for building a package. The program will be
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# installed in this directory as if it was the root directory.
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# Then the build tool can move it later.
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DESTDIR ?=
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DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
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LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
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ifeq ($(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 ','\'',$(man_dir))'
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export man_dir man_dir_SQ INSTALL
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export DESTDIR DESTDIR_SQ
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include ../../scripts/Makefile.include
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# copy a bit from Linux kbuild
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ifeq ("$(origin V)", "command line")
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VERBOSE = $(V)
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endif
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ifndef VERBOSE
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VERBOSE = 0
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endif
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(shell pwd)))
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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 $(srctree))
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endif
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FEATURE_USER = .libbpf
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FEATURE_TESTS = libelf libelf-getphdrnum libelf-mmap bpf
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FEATURE_DISPLAY = libelf bpf
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INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/arch/$(ARCH)/include/uapi -I$(srctree)/include/uapi
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FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES)
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include $(srctree)/tools/build/Makefile.feature
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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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plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
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LIB_FILE = libbpf.a libbpf.so
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VERSION = $(BPF_VERSION)
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PATCHLEVEL = $(BPF_PATCHLEVEL)
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EXTRAVERSION = $(BPF_EXTRAVERSION)
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OBJ = $@
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N =
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LIBBPF_VERSION = $(BPF_VERSION).$(BPF_PATCHLEVEL).$(BPF_EXTRAVERSION)
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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-libelf-getphdrnum), 1)
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override CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT
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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 += $(INCLUDES)
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ifeq ($(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) overide 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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BPF_IN := $(OUTPUT)libbpf-in.o
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LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
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CMD_TARGETS = $(LIB_FILE)
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TARGETS = $(CMD_TARGETS)
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all: fixdep $(VERSION_FILES) all_cmd
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all_cmd: $(CMD_TARGETS)
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$(BPF_IN): force elfdep bpfdep
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$(Q)$(MAKE) $(build)=libbpf
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$(OUTPUT)libbpf.so: $(BPF_IN)
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$(QUIET_LINK)$(CC) --shared $^ -o $@
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$(OUTPUT)libbpf.a: $(BPF_IN)
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$(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
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define update_dir
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(echo $1 > $@.tmp; \
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if [ -r $@ ] && cmp -s $@ $@.tmp; then \
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rm -f $@.tmp; \
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else \
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echo ' UPDATE $@'; \
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mv -f $@.tmp $@; \
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fi);
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endef
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define do_install
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if [ ! -d '$(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) $1 '$(DESTDIR_SQ)$2'
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endef
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install_lib: all_cmd
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$(call QUIET_INSTALL, $(LIB_FILE)) \
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$(call do_install,$(LIB_FILE),$(libdir_SQ))
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install: install_lib
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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) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d \
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$(RM) LIBBPF-CFLAGS
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$(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP
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PHONY += force elfdep bpfdep
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force:
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elfdep:
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@if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit -1 ; fi
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bpfdep:
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@if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit -1 ; fi
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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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