ifeq ("$(origin O)", "command line")
  	OUTPUT := $(O)/
  endif

  # The default target of this Makefile is...

  all:

  include config/utilities.mak

  ifneq ($(OUTPUT),)
  # check that the output directory actually exists
  OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
  $(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
  endif

  # Define V to have a more verbose compile.

  #

  # Define PYTHON to point to the python binary if the default
  # `python' is not correct; for example: PYTHON=python2
  #
  # Define PYTHON_CONFIG to point to the python-config binary if
  # the default `$(PYTHON)-config' is not correct.
  #

  # Define ASCIIDOC8 if you want to format documentation with AsciiDoc 8
  #
  # Define DOCBOOK_XSL_172 if you want to format man pages with DocBook XSL v1.72.
  #

  # Define LDFLAGS=-static to build a static binary.

  #
  # Define EXTRA_CFLAGS=-m64 or EXTRA_CFLAGS=-m32 as appropriate for cross-builds.

  #
  # Define NO_DWARF if you do not want debug-info analysis feature at all.

  #
  # Define WERROR=0 to disable treating any warnings as errors.

  $(OUTPUT)PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
  	@$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT)
  -include $(OUTPUT)PERF-VERSION-FILE

  uname_M := $(shell uname -m 2>/dev/null || echo not)

  ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  				  -e s/arm.*/arm/ -e s/sa110/arm/ \
  				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
  				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  				  -e s/sh[234].*/sh/ )

  CC = $(CROSS_COMPILE)gcc
  AR = $(CROSS_COMPILE)ar

  # Additional ARCH settings for x86
  ifeq ($(ARCH),i386)
          ARCH := x86
  endif
  ifeq ($(ARCH),x86_64)

  	ARCH := x86

  	IS_X86_64 := 0
  	ifeq (, $(findstring m32,$(EXTRA_CFLAGS)))
  		IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1)
  	endif

  	ifeq (${IS_X86_64}, 1)
  		RAW_ARCH := x86_64
  		ARCH_CFLAGS := -DARCH_X86_64
  		ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S
  	endif

  endif

  # Treat warnings as errors unless directed not to
  ifneq ($(WERROR),0)
  	CFLAGS_WERROR := -Werror
  endif

  #
  # Include saner warnings here, which can catch bugs:
  #

  EXTRA_WARNINGS := -Wformat

  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wformat-security
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wformat-y2k
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wshadow
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Winit-self
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wpacked
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wredundant-decls

  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wstrict-aliasing=3
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wswitch-default
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wswitch-enum
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wno-system-headers
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wundef

  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wwrite-strings
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wbad-function-cast
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wmissing-declarations
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wmissing-prototypes
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wnested-externs
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wold-style-definition
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wstrict-prototypes
  EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wdeclaration-after-statement

  ifeq ("$(origin DEBUG)", "command line")
    PERF_DEBUG = $(DEBUG)
  endif
  ifndef PERF_DEBUG
    CFLAGS_OPTIMIZE = -O6
  endif

  CFLAGS = -fno-omit-frame-pointer -ggdb3 -Wall -Wextra -std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)

  EXTLIBS = -lpthread -lrt -lelf -lm

  ALL_CFLAGS = $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64

  ALL_LDFLAGS = $(LDFLAGS)
  STRIP ?= strip
  
  # Among the variables below, these:

  #   perfexecdir

  #   template_dir
  #   mandir
  #   infodir
  #   htmldir

  #   ETC_PERFCONFIG (but not sysconfdir)

  # can be specified as a relative path some/where/else;

  # this is interpreted as relative to $(prefix) and "perf" at

  # runtime figures out where they are based on the path to the executable.
  # This can help installing the suite in a relocatable way.

  # Make the path relative to DESTDIR, not to prefix
  ifndef DESTDIR

  prefix = $(HOME)

  endif

  bindir_relative = bin
  bindir = $(prefix)/$(bindir_relative)
  mandir = share/man
  infodir = share/info

  perfexecdir = libexec/perf-core

  sharedir = $(prefix)/share

  template_dir = share/perf-core/templates
  htmldir = share/doc/perf-doc

  ifeq ($(prefix),/usr)
  sysconfdir = /etc

  ETC_PERFCONFIG = $(sysconfdir)/perfconfig

  else
  sysconfdir = $(prefix)/etc

  ETC_PERFCONFIG = etc/perfconfig

  endif
  lib = lib

  export prefix bindir sharedir sysconfdir

  RM = rm -f

  MKDIR = mkdir

  FIND = find
  INSTALL = install

  # sparse is architecture-neutral, which means that we need to tell it
  # explicitly what architecture to check for. Fix this up for yours..
  SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__powerpc__

  -include config/feature-tests.mak

  ifeq ($(call try-cc,$(SOURCE_HELLO),-Werror -fstack-protector-all),y)
  	CFLAGS := $(CFLAGS) -fstack-protector-all

  endif

  ifeq ($(call try-cc,$(SOURCE_HELLO),-Werror -Wstack-protector),y)
         CFLAGS := $(CFLAGS) -Wstack-protector
  endif
  
  ifeq ($(call try-cc,$(SOURCE_HELLO),-Werror -Wvolatile-register-var),y)
         CFLAGS := $(CFLAGS) -Wvolatile-register-var
  endif

  
  ### --- END CONFIGURATION SECTION ---
  
  # Those must not be GNU-specific; they are shared with perl/ which may
  # be built by a different compiler. (Note that this is an artifact now
  # but it still might be nice to keep that distinction.)

  BASIC_CFLAGS = -Iutil/include -Iarch/$(ARCH)/include

  BASIC_LDFLAGS =
  
  # Guard against environment variables
  BUILTIN_OBJS =

  LIB_H =
  LIB_OBJS =

  PYRF_OBJS =

  SCRIPT_SH =

  SCRIPT_SH += perf-archive.sh

  grep-libs = $(filter -l%,$(1))
  strip-libs = $(filter-out -l%,$(1))

  $(OUTPUT)python/perf.so: $(PYRF_OBJS)

  	$(QUIET_GEN)CFLAGS='$(BASIC_CFLAGS)' $(PYTHON_WORD) util/setup.py \

  	  --quiet build_ext; \
  	mkdir -p $(OUTPUT)python && \
  	cp $(PYTHON_EXTBUILD_LIB)perf.so $(OUTPUT)python/

  #
  # No Perl scripts right now:
  #

  SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH))

  #

  # Single 'perf' binary right now:

  #

  PROGRAMS += $(OUTPUT)perf

  LANG_BINDINGS =

  # what 'all' will build and 'install' will install, in perfexecdir

  ALL_PROGRAMS = $(PROGRAMS) $(SCRIPTS)

  # what 'all' will build but not install in perfexecdir

  OTHER_PROGRAMS = $(OUTPUT)perf

  
  # Set paths to tools early so that they can be used for version tests.
  ifndef SHELL_PATH
  	SHELL_PATH = /bin/sh
  endif
  ifndef PERL_PATH
  	PERL_PATH = /usr/bin/perl
  endif
  
  export PERL_PATH

  LIB_FILE=$(OUTPUT)libperf.a

  LIB_H += ../../include/linux/perf_event.h

  LIB_H += ../../include/linux/rbtree.h

  LIB_H += ../../include/linux/list.h

  LIB_H += ../../include/linux/const.h

  LIB_H += ../../include/linux/hash.h

  LIB_H += ../../include/linux/stringify.h

  LIB_H += util/include/linux/bitmap.h
  LIB_H += util/include/linux/bitops.h
  LIB_H += util/include/linux/compiler.h

  LIB_H += util/include/linux/const.h

  LIB_H += util/include/linux/ctype.h
  LIB_H += util/include/linux/kernel.h

  LIB_H += util/include/linux/list.h

  LIB_H += util/include/linux/module.h
  LIB_H += util/include/linux/poison.h
  LIB_H += util/include/linux/prefetch.h
  LIB_H += util/include/linux/rbtree.h

  LIB_H += util/include/linux/string.h

  LIB_H += util/include/linux/types.h

  LIB_H += util/include/linux/linkage.h

  LIB_H += util/include/asm/asm-offsets.h

  LIB_H += util/include/asm/bug.h

  LIB_H += util/include/asm/byteorder.h

  LIB_H += util/include/asm/hweight.h

  LIB_H += util/include/asm/swab.h
  LIB_H += util/include/asm/system.h

  LIB_H += util/include/asm/uaccess.h

  LIB_H += util/include/dwarf-regs.h

  LIB_H += util/include/asm/dwarf2.h
  LIB_H += util/include/asm/cpufeature.h

  LIB_H += perf.h

  LIB_H += util/annotate.h

  LIB_H += util/cache.h
  LIB_H += util/callchain.h

  LIB_H += util/build-id.h

  LIB_H += util/debug.h

  LIB_H += util/debugfs.h

  LIB_H += util/event.h

  LIB_H += util/evsel.h

  LIB_H += util/evlist.h

  LIB_H += util/exec_cmd.h

  LIB_H += util/types.h

  LIB_H += util/levenshtein.h

  LIB_H += util/map.h

  LIB_H += util/parse-options.h

  LIB_H += util/parse-events.h

  LIB_H += util/quote.h
  LIB_H += util/util.h

  LIB_H += util/xyarray.h

  LIB_H += util/header.h

  LIB_H += util/help.h

  LIB_H += util/session.h

  LIB_H += util/strbuf.h

  LIB_H += util/strlist.h

  LIB_H += util/strfilter.h

  LIB_H += util/svghelper.h

  LIB_H += util/run-command.h

  LIB_H += util/sigchain.h

  LIB_H += util/symbol.h

  LIB_H += util/color.h

  LIB_H += util/values.h

  LIB_H += util/sort.h

  LIB_H += util/hist.h

  LIB_H += util/thread.h

  LIB_H += util/thread_map.h

  LIB_H += util/trace-event.h

  LIB_H += util/probe-finder.h

  LIB_H += util/dwarf-aux.h

  LIB_H += util/probe-event.h

  LIB_H += util/pstack.h

  LIB_H += util/cpumap.h

  LIB_H += util/top.h

  LIB_H += $(ARCH_INCLUDE)

  LIB_H += util/cgroup.h

  LIB_OBJS += $(OUTPUT)util/abspath.o
  LIB_OBJS += $(OUTPUT)util/alias.o

  LIB_OBJS += $(OUTPUT)util/annotate.o

  LIB_OBJS += $(OUTPUT)util/build-id.o
  LIB_OBJS += $(OUTPUT)util/config.o
  LIB_OBJS += $(OUTPUT)util/ctype.o
  LIB_OBJS += $(OUTPUT)util/debugfs.o
  LIB_OBJS += $(OUTPUT)util/environment.o
  LIB_OBJS += $(OUTPUT)util/event.o

  LIB_OBJS += $(OUTPUT)util/evlist.o

  LIB_OBJS += $(OUTPUT)util/evsel.o

  LIB_OBJS += $(OUTPUT)util/exec_cmd.o
  LIB_OBJS += $(OUTPUT)util/help.o
  LIB_OBJS += $(OUTPUT)util/levenshtein.o
  LIB_OBJS += $(OUTPUT)util/parse-options.o
  LIB_OBJS += $(OUTPUT)util/parse-events.o
  LIB_OBJS += $(OUTPUT)util/path.o
  LIB_OBJS += $(OUTPUT)util/rbtree.o
  LIB_OBJS += $(OUTPUT)util/bitmap.o
  LIB_OBJS += $(OUTPUT)util/hweight.o

  LIB_OBJS += $(OUTPUT)util/run-command.o
  LIB_OBJS += $(OUTPUT)util/quote.o
  LIB_OBJS += $(OUTPUT)util/strbuf.o
  LIB_OBJS += $(OUTPUT)util/string.o
  LIB_OBJS += $(OUTPUT)util/strlist.o

  LIB_OBJS += $(OUTPUT)util/strfilter.o

  LIB_OBJS += $(OUTPUT)util/top.o

  LIB_OBJS += $(OUTPUT)util/usage.o
  LIB_OBJS += $(OUTPUT)util/wrapper.o
  LIB_OBJS += $(OUTPUT)util/sigchain.o
  LIB_OBJS += $(OUTPUT)util/symbol.o
  LIB_OBJS += $(OUTPUT)util/color.o
  LIB_OBJS += $(OUTPUT)util/pager.o
  LIB_OBJS += $(OUTPUT)util/header.o
  LIB_OBJS += $(OUTPUT)util/callchain.o
  LIB_OBJS += $(OUTPUT)util/values.o
  LIB_OBJS += $(OUTPUT)util/debug.o
  LIB_OBJS += $(OUTPUT)util/map.o

  LIB_OBJS += $(OUTPUT)util/pstack.o

  LIB_OBJS += $(OUTPUT)util/session.o
  LIB_OBJS += $(OUTPUT)util/thread.o

  LIB_OBJS += $(OUTPUT)util/thread_map.o

  LIB_OBJS += $(OUTPUT)util/trace-event-parse.o
  LIB_OBJS += $(OUTPUT)util/trace-event-read.o
  LIB_OBJS += $(OUTPUT)util/trace-event-info.o
  LIB_OBJS += $(OUTPUT)util/trace-event-scripting.o
  LIB_OBJS += $(OUTPUT)util/svghelper.o
  LIB_OBJS += $(OUTPUT)util/sort.o
  LIB_OBJS += $(OUTPUT)util/hist.o
  LIB_OBJS += $(OUTPUT)util/probe-event.o
  LIB_OBJS += $(OUTPUT)util/util.o

  LIB_OBJS += $(OUTPUT)util/xyarray.o

  LIB_OBJS += $(OUTPUT)util/cpumap.o

  LIB_OBJS += $(OUTPUT)util/cgroup.o

  
  BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
  
  BUILTIN_OBJS += $(OUTPUT)builtin-bench.o

  
  # Benchmark modules

  BUILTIN_OBJS += $(OUTPUT)bench/sched-messaging.o
  BUILTIN_OBJS += $(OUTPUT)bench/sched-pipe.o

  ifeq ($(RAW_ARCH),x86_64)
  BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy-x86-64-asm.o
  endif

  BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy.o
  
  BUILTIN_OBJS += $(OUTPUT)builtin-diff.o

  BUILTIN_OBJS += $(OUTPUT)builtin-evlist.o

  BUILTIN_OBJS += $(OUTPUT)builtin-help.o
  BUILTIN_OBJS += $(OUTPUT)builtin-sched.o
  BUILTIN_OBJS += $(OUTPUT)builtin-buildid-list.o
  BUILTIN_OBJS += $(OUTPUT)builtin-buildid-cache.o
  BUILTIN_OBJS += $(OUTPUT)builtin-list.o
  BUILTIN_OBJS += $(OUTPUT)builtin-record.o
  BUILTIN_OBJS += $(OUTPUT)builtin-report.o
  BUILTIN_OBJS += $(OUTPUT)builtin-stat.o
  BUILTIN_OBJS += $(OUTPUT)builtin-timechart.o
  BUILTIN_OBJS += $(OUTPUT)builtin-top.o

  BUILTIN_OBJS += $(OUTPUT)builtin-script.o

  BUILTIN_OBJS += $(OUTPUT)builtin-probe.o
  BUILTIN_OBJS += $(OUTPUT)builtin-kmem.o
  BUILTIN_OBJS += $(OUTPUT)builtin-lock.o

  BUILTIN_OBJS += $(OUTPUT)builtin-kvm.o

  BUILTIN_OBJS += $(OUTPUT)builtin-test.o

  BUILTIN_OBJS += $(OUTPUT)builtin-inject.o

  
  PERFLIBS = $(LIB_FILE)

  # Files needed for the python binding, perf.so
  # pyrf is just an internal name needed for all those wrappers.
  # This has to be in sync with what is in the 'sources' variable in
  # tools/perf/util/setup.py
  
  PYRF_OBJS += $(OUTPUT)util/cpumap.o
  PYRF_OBJS += $(OUTPUT)util/ctype.o
  PYRF_OBJS += $(OUTPUT)util/evlist.o
  PYRF_OBJS += $(OUTPUT)util/evsel.o
  PYRF_OBJS += $(OUTPUT)util/python.o
  PYRF_OBJS += $(OUTPUT)util/thread_map.o
  PYRF_OBJS += $(OUTPUT)util/util.o
  PYRF_OBJS += $(OUTPUT)util/xyarray.o

  #
  # Platform specific tweaks
  #
  
  # We choose to avoid "if .. else if .. else .. endif endif"
  # because maintaining the nesting to match is a pain.  If
  # we had "elif" things would have been much nicer...

  -include config.mak.autogen
  -include config.mak

  ifndef NO_DWARF

  FLAGS_DWARF=$(ALL_CFLAGS) -ldw -lelf $(ALL_LDFLAGS) $(EXTLIBS)

  ifneq ($(call try-cc,$(SOURCE_DWARF),$(FLAGS_DWARF)),y)

  	msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);

  	NO_DWARF := 1
  endif # Dwarf support
  endif # NO_DWARF
  
  -include arch/$(ARCH)/Makefile

  ifneq ($(OUTPUT),)
  	BASIC_CFLAGS += -I$(OUTPUT)
  endif

  FLAGS_LIBELF=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS)
  ifneq ($(call try-cc,$(SOURCE_LIBELF),$(FLAGS_LIBELF)),y)
  	FLAGS_GLIBC=$(ALL_CFLAGS) $(ALL_LDFLAGS)
  	ifneq ($(call try-cc,$(SOURCE_GLIBC),$(FLAGS_GLIBC)),y)
  		msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]/glibc-static);
  	else
  		msg := $(error No libelf.h/libelf found, please install libelf-dev/elfutils-libelf-devel);
  	endif

  endif

  ifneq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_COMMON)),y)
  	BASIC_CFLAGS += -DLIBELF_NO_MMAP

  endif

  ifndef NO_DWARF

  ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined)
  	msg := $(warning DWARF register mappings have not been defined for architecture $(ARCH), DWARF support disabled);
  else

  	BASIC_CFLAGS += -DDWARF_SUPPORT

  	EXTLIBS += -lelf -ldw

  	LIB_OBJS += $(OUTPUT)util/probe-finder.o

  	LIB_OBJS += $(OUTPUT)util/dwarf-aux.o

  endif # PERF_HAVE_DWARF_REGS
  endif # NO_DWARF

  ifdef NO_NEWT
  	BASIC_CFLAGS += -DNO_NEWT_SUPPORT
  else

  	FLAGS_NEWT=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) -lnewt
  	ifneq ($(call try-cc,$(SOURCE_NEWT),$(FLAGS_NEWT)),y)
  		msg := $(warning newt not found, disables TUI support. Please install newt-devel or libnewt-dev);
  		BASIC_CFLAGS += -DNO_NEWT_SUPPORT
  	else
  		# Fedora has /usr/include/slang/slang.h, but ubuntu /usr/include/slang.h
  		BASIC_CFLAGS += -I/usr/include/slang
  		EXTLIBS += -lnewt -lslang

  		LIB_OBJS += $(OUTPUT)util/ui/setup.o

  		LIB_OBJS += $(OUTPUT)util/ui/browser.o

  		LIB_OBJS += $(OUTPUT)util/ui/browsers/annotate.o

  		LIB_OBJS += $(OUTPUT)util/ui/browsers/hists.o

  		LIB_OBJS += $(OUTPUT)util/ui/browsers/map.o

  		LIB_OBJS += $(OUTPUT)util/ui/helpline.o

  		LIB_OBJS += $(OUTPUT)util/ui/progress.o

  		LIB_OBJS += $(OUTPUT)util/ui/util.o

  		LIB_H += util/ui/browser.h

  		LIB_H += util/ui/browsers/map.h

  		LIB_H += util/ui/helpline.h

  		LIB_H += util/ui/keysyms.h

  		LIB_H += util/ui/libslang.h

  		LIB_H += util/ui/progress.h

  		LIB_H += util/ui/util.h

  		LIB_H += util/ui/ui.h

  	endif

  endif

  ifdef NO_LIBPERL

  	BASIC_CFLAGS += -DNO_LIBPERL
  else

         PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
         PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
         PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))

  	PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`

  	FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)

  	ifneq ($(call try-cc,$(SOURCE_PERL_EMBED),$(FLAGS_PERL_EMBED)),y)
  		BASIC_CFLAGS += -DNO_LIBPERL
  	else

                 ALL_LDFLAGS += $(PERL_EMBED_LDFLAGS)
                 EXTLIBS += $(PERL_EMBED_LIBADD)

  		LIB_OBJS += $(OUTPUT)util/scripting-engines/trace-event-perl.o
  		LIB_OBJS += $(OUTPUT)scripts/perl/Perf-Trace-Util/Context.o
  	endif

  endif

  disable-python = $(eval $(disable-python_code))
  define disable-python_code
    BASIC_CFLAGS += -DNO_LIBPYTHON
    $(if $(1),$(warning No $(1) was found))
    $(warning Python support won't be built)
  endef
  
  override PYTHON := \
    $(call get-executable-or-default,PYTHON,python)
  
  ifndef PYTHON
    $(call disable-python,python interpreter)
    python-clean :=

  else

  
    PYTHON_WORD := $(call shell-wordify,$(PYTHON))

    # python extension build directories
    PYTHON_EXTBUILD     := $(OUTPUT)python_ext_build/
    PYTHON_EXTBUILD_LIB := $(PYTHON_EXTBUILD)lib/
    PYTHON_EXTBUILD_TMP := $(PYTHON_EXTBUILD)tmp/
    export PYTHON_EXTBUILD_LIB PYTHON_EXTBUILD_TMP
  
    python-clean := rm -rf $(PYTHON_EXTBUILD) $(OUTPUT)python/perf.so

  
    ifdef NO_LIBPYTHON
      $(call disable-python)
    else
  
      override PYTHON_CONFIG := \
        $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON)-config)
  
      ifndef PYTHON_CONFIG
        $(call disable-python,python-config tool)
      else
  
        PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
  
        PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
        PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
        PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS))
        PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
        FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
  
        ifneq ($(call try-cc,$(SOURCE_PYTHON_EMBED),$(FLAGS_PYTHON_EMBED)),y)
          $(call disable-python,Python.h (for Python 2.x))
        else
  
          ifneq ($(call try-cc,$(SOURCE_PYTHON_VERSION),$(FLAGS_PYTHON_EMBED)),y)
            $(warning Python 3 is not yet supported; please set)
            $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
            $(warning If you also have Python 2 installed, then)
            $(warning try something like:)
            $(warning $(and ,))
            $(warning $(and ,)  make PYTHON=python2)
            $(warning $(and ,))
            $(warning Otherwise, disable Python support entirely:)
            $(warning $(and ,))
            $(warning $(and ,)  make NO_LIBPYTHON=1)
            $(warning $(and ,))
            $(error   $(and ,))
          else
            ALL_LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
            EXTLIBS += $(PYTHON_EMBED_LIBADD)
            LIB_OBJS += $(OUTPUT)util/scripting-engines/trace-event-python.o
            LIB_OBJS += $(OUTPUT)scripts/python/Perf-Trace-Util/Context.o
            LANG_BINDINGS += $(OUTPUT)python/perf.so
          endif
  
        endif
      endif
    endif

  endif

  ifdef NO_DEMANGLE
  	BASIC_CFLAGS += -DNO_DEMANGLE
  else

          ifdef HAVE_CPLUS_DEMANGLE
  		EXTLIBS += -liberty
  		BASIC_CFLAGS += -DHAVE_CPLUS_DEMANGLE
          else
  		FLAGS_BFD=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) -lbfd
  		has_bfd := $(call try-cc,$(SOURCE_BFD),$(FLAGS_BFD))
  		ifeq ($(has_bfd),y)
  			EXTLIBS += -lbfd

  		else

  			FLAGS_BFD_IBERTY=$(FLAGS_BFD) -liberty
  			has_bfd_iberty := $(call try-cc,$(SOURCE_BFD),$(FLAGS_BFD_IBERTY))
  			ifeq ($(has_bfd_iberty),y)
  				EXTLIBS += -lbfd -liberty

  			else

  				FLAGS_BFD_IBERTY_Z=$(FLAGS_BFD_IBERTY) -lz
  				has_bfd_iberty_z := $(call try-cc,$(SOURCE_BFD),$(FLAGS_BFD_IBERTY_Z))
  				ifeq ($(has_bfd_iberty_z),y)
  					EXTLIBS += -lbfd -liberty -lz

  				else

  					FLAGS_CPLUS_DEMANGLE=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) -liberty
  					has_cplus_demangle := $(call try-cc,$(SOURCE_CPLUS_DEMANGLE),$(FLAGS_CPLUS_DEMANGLE))
  					ifeq ($(has_cplus_demangle),y)
  						EXTLIBS += -liberty
  						BASIC_CFLAGS += -DHAVE_CPLUS_DEMANGLE
  					else
  						msg := $(warning No bfd.h/libbfd found, install binutils-dev[el]/zlib-static to gain symbol demangling)
  						BASIC_CFLAGS += -DNO_DEMANGLE
  					endif

  				endif
  			endif
  		endif

  	endif
  endif

  
  ifdef NO_STRLCPY
  	BASIC_CFLAGS += -DNO_STRLCPY
  else
  	ifneq ($(call try-cc,$(SOURCE_STRLCPY),),y)
  		BASIC_CFLAGS += -DNO_STRLCPY
  	endif
  endif

  ifneq ($(findstring $(MAKEFLAGS),s),s)
  ifndef V
  	QUIET_CC       = @echo '   ' CC $@;
  	QUIET_AR       = @echo '   ' AR $@;
  	QUIET_LINK     = @echo '   ' LINK $@;

  	QUIET_MKDIR    = @echo '   ' MKDIR $@;

  	QUIET_GEN      = @echo '   ' GEN $@;

  endif
  endif
  
  ifdef ASCIIDOC8
  	export ASCIIDOC8
  endif
  
  # Shell quote (do not use $(call) to accommodate ancient setups);

  ETC_PERFCONFIG_SQ = $(subst ','\'',$(ETC_PERFCONFIG))

  
  DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
  bindir_SQ = $(subst ','\'',$(bindir))
  bindir_relative_SQ = $(subst ','\'',$(bindir_relative))
  mandir_SQ = $(subst ','\'',$(mandir))
  infodir_SQ = $(subst ','\'',$(infodir))

  perfexecdir_SQ = $(subst ','\'',$(perfexecdir))

  template_dir_SQ = $(subst ','\'',$(template_dir))
  htmldir_SQ = $(subst ','\'',$(htmldir))
  prefix_SQ = $(subst ','\'',$(prefix))
  
  SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))

  LIBS = -Wl,--whole-archive $(PERFLIBS) -Wl,--no-whole-archive -Wl,--start-group $(EXTLIBS) -Wl,--end-group

  ALL_CFLAGS += $(BASIC_CFLAGS)

  ALL_CFLAGS += $(ARCH_CFLAGS)

  ALL_LDFLAGS += $(BASIC_LDFLAGS)

  export INSTALL SHELL_PATH

  
  
  ### Build rules
  
  SHELL = $(SHELL_PATH)

  all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS)

  
  please_set_SHELL_PATH_to_a_more_modern_shell:
  	@$$(:)
  
  shell_compatibility_test: please_set_SHELL_PATH_to_a_more_modern_shell

  strip: $(PROGRAMS) $(OUTPUT)perf
  	$(STRIP) $(STRIP_OPTS) $(PROGRAMS) $(OUTPUT)perf

  $(OUTPUT)perf.o: perf.c $(OUTPUT)common-cmds.h $(OUTPUT)PERF-CFLAGS

  	$(QUIET_CC)$(CC) -DPERF_VERSION='"$(PERF_VERSION)"' \
  		'-DPERF_HTML_PATH="$(htmldir_SQ)"' \

  		$(ALL_CFLAGS) -c $(filter %.c,$^) -o $@

  $(OUTPUT)perf: $(OUTPUT)perf.o $(BUILTIN_OBJS) $(PERFLIBS)

  	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) $(ALL_LDFLAGS) $(OUTPUT)perf.o \
                 $(BUILTIN_OBJS) $(LIBS) -o $@

  $(OUTPUT)builtin-help.o: builtin-help.c $(OUTPUT)common-cmds.h $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) \

  		'-DPERF_HTML_PATH="$(htmldir_SQ)"' \
  		'-DPERF_MAN_PATH="$(mandir_SQ)"' \

  		'-DPERF_INFO_PATH="$(infodir_SQ)"' $<

  $(OUTPUT)builtin-timechart.o: builtin-timechart.c $(OUTPUT)common-cmds.h $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) \

  		'-DPERF_HTML_PATH="$(htmldir_SQ)"' \
  		'-DPERF_MAN_PATH="$(mandir_SQ)"' \

  		'-DPERF_INFO_PATH="$(infodir_SQ)"' $<

  $(OUTPUT)common-cmds.h: util/generate-cmdlist.sh command-list.txt

  $(OUTPUT)common-cmds.h: $(wildcard Documentation/perf-*.txt)

  	$(QUIET_GEN). util/generate-cmdlist.sh > $@+ && mv $@+ $@

  $(SCRIPTS) : % : %.sh
  	$(QUIET_GEN)$(INSTALL) '$@.sh' '$(OUTPUT)$@'

  # These can record PERF_VERSION

  $(OUTPUT)perf.o perf.spec \

  	$(SCRIPTS) \

  	: $(OUTPUT)PERF-VERSION-FILE

  $(OUTPUT)%.o: %.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $<
  $(OUTPUT)%.s: %.c $(OUTPUT)PERF-CFLAGS

  	$(QUIET_CC)$(CC) -S $(ALL_CFLAGS) $<

  $(OUTPUT)%.o: %.S
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $<

  $(OUTPUT)util/exec_cmd.o: util/exec_cmd.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) \

  		'-DPERF_EXEC_PATH="$(perfexecdir_SQ)"' \

  		'-DBINDIR="$(bindir_relative_SQ)"' \
  		'-DPREFIX="$(prefix_SQ)"' \
  		$<

  $(OUTPUT)util/config.o: util/config.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<

  $(OUTPUT)util/ui/browser.o: util/ui/browser.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DENABLE_SLFUTURE_CONST $<

  $(OUTPUT)util/ui/browsers/annotate.o: util/ui/browsers/annotate.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DENABLE_SLFUTURE_CONST $<

  $(OUTPUT)util/ui/browsers/hists.o: util/ui/browsers/hists.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DENABLE_SLFUTURE_CONST $<

  $(OUTPUT)util/ui/browsers/map.o: util/ui/browsers/map.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DENABLE_SLFUTURE_CONST $<

  $(OUTPUT)util/rbtree.o: ../../lib/rbtree.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<

  $(OUTPUT)util/scripting-engines/trace-event-perl.o: util/scripting-engines/trace-event-perl.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow $<

  $(OUTPUT)scripts/perl/Perf-Trace-Util/Context.o: scripts/perl/Perf-Trace-Util/Context.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-nested-externs $<

  $(OUTPUT)util/scripting-engines/trace-event-python.o: util/scripting-engines/trace-event-python.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $(PYTHON_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow $<

  $(OUTPUT)scripts/python/Perf-Trace-Util/Context.o: scripts/python/Perf-Trace-Util/Context.c $(OUTPUT)PERF-CFLAGS
  	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $(PYTHON_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-nested-externs $<

  $(OUTPUT)perf-%: %.o $(PERFLIBS)

  	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)

  $(LIB_OBJS) $(BUILTIN_OBJS): $(LIB_H)

  $(patsubst perf-%,%.o,$(PROGRAMS)): $(LIB_H) $(wildcard */*.h)

  # we compile into subdirectories. if the target directory is not the source directory, they might not exists. So
  # we depend the various files onto their directories.
  DIRECTORY_DEPS = $(LIB_OBJS) $(BUILTIN_OBJS) $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h

  $(DIRECTORY_DEPS): | $(sort $(dir $(DIRECTORY_DEPS)))

  # In the second step, we make a rule to actually create these directories
  $(sort $(dir $(DIRECTORY_DEPS))):
  	$(QUIET_MKDIR)$(MKDIR) -p $@ 2>/dev/null

  $(LIB_FILE): $(LIB_OBJS)
  	$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(LIB_OBJS)

  help:
  	@echo 'Perf make targets:'
  	@echo '  doc		- make *all* documentation (see below)'
  	@echo '  man		- make manpage documentation (access with man <foo>)'
  	@echo '  html		- make html documentation'
  	@echo '  info		- make GNU info documentation (access with info <foo>)'
  	@echo '  pdf		- make pdf documentation'
  	@echo '  TAGS		- use etags to make tag information for source browsing'
  	@echo '  tags		- use ctags to make tag information for source browsing'
  	@echo '  cscope	- use cscope to make interactive browsing database'
  	@echo ''
  	@echo 'Perf install targets:'
  	@echo '  NOTE: documentation build requires asciidoc, xmlto packages to be installed'
  	@echo '  HINT: use "make prefix=<path> <install target>" to install to a particular'
  	@echo '        path like make prefix=/usr/local install install-doc'
  	@echo '  install	- install compiled binaries'
  	@echo '  install-doc	- install *all* documentation'
  	@echo '  install-man	- install manpage documentation'
  	@echo '  install-html	- install html documentation'
  	@echo '  install-info	- install GNU info documentation'
  	@echo '  install-pdf	- install pdf documentation'
  	@echo ''
  	@echo '  quick-install-doc	- alias for quick-install-man'
  	@echo '  quick-install-man	- install the documentation quickly'
  	@echo '  quick-install-html	- install the html documentation quickly'
  	@echo ''
  	@echo 'Perf maintainer targets:'
  	@echo '  distclean		- alias to clean'
  	@echo '  clean			- clean all binary objects and build output'

  doc:
  	$(MAKE) -C Documentation all
  
  man:
  	$(MAKE) -C Documentation man
  
  html:
  	$(MAKE) -C Documentation html
  
  info:
  	$(MAKE) -C Documentation info
  
  pdf:
  	$(MAKE) -C Documentation pdf

  TAGS:
  	$(RM) TAGS
  	$(FIND) . -name '*.[hcS]' -print | xargs etags -a
  
  tags:
  	$(RM) tags
  	$(FIND) . -name '*.[hcS]' -print | xargs ctags -a
  
  cscope:
  	$(RM) cscope*
  	$(FIND) . -name '*.[hcS]' -print | xargs cscope -b
  
  ### Detect prefix changes
  TRACK_CFLAGS = $(subst ','\'',$(ALL_CFLAGS)):\

               $(bindir_SQ):$(perfexecdir_SQ):$(template_dir_SQ):$(prefix_SQ)

  $(OUTPUT)PERF-CFLAGS: .FORCE-PERF-CFLAGS

  	@FLAGS='$(TRACK_CFLAGS)'; \

  	    if test x"$$FLAGS" != x"`cat $(OUTPUT)PERF-CFLAGS 2>/dev/null`" ; then \

  		echo 1>&2 "    * new build flags or prefix"; \

  		echo "$$FLAGS" >$(OUTPUT)PERF-CFLAGS; \

              fi

  ### Testing rules

  # GNU make supports exporting all variables by "export" without parameters.
  # However, the environment gets quite big, and some programs have problems
  # with that.

  check: $(OUTPUT)common-cmds.h

  	if sparse; \
  	then \

  		for i in *.c */*.c; \

  		do \
  			sparse $(ALL_CFLAGS) $(SPARSE_FLAGS) $$i || exit; \
  		done; \
  	else \

  		exit 1; \
  	fi

  ### Installation rules

  ifneq ($(filter /%,$(firstword $(perfexecdir))),)
  perfexec_instdir = $(perfexecdir)

  else

  perfexec_instdir = $(prefix)/$(perfexecdir)

  endif

  perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))

  
  install: all
  	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(bindir_SQ)'

  	$(INSTALL) $(OUTPUT)perf '$(DESTDIR_SQ)$(bindir_SQ)'

  	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl/Perf-Trace-Util/lib/Perf/Trace'
  	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl/bin'

  	$(INSTALL) $(OUTPUT)perf-archive -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'

  	$(INSTALL) scripts/perl/Perf-Trace-Util/lib/Perf/Trace/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl/Perf-Trace-Util/lib/Perf/Trace'
  	$(INSTALL) scripts/perl/*.pl -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl'
  	$(INSTALL) scripts/perl/bin/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/perl/bin'

  	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/Perf-Trace-Util/lib/Perf/Trace'

  	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/bin'

  	$(INSTALL) scripts/python/Perf-Trace-Util/lib/Perf/Trace/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/Perf-Trace-Util/lib/Perf/Trace'

  	$(INSTALL) scripts/python/*.py -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python'
  	$(INSTALL) scripts/python/bin/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/bin'

  install-python_ext:
  	$(PYTHON_WORD) util/setup.py --quiet install --root='/$(DESTDIR_SQ)'

  install-doc:
  	$(MAKE) -C Documentation install
  
  install-man:
  	$(MAKE) -C Documentation install-man
  
  install-html:
  	$(MAKE) -C Documentation install-html
  
  install-info:
  	$(MAKE) -C Documentation install-info
  
  install-pdf:
  	$(MAKE) -C Documentation install-pdf
  
  quick-install-doc:
  	$(MAKE) -C Documentation quick-install
  
  quick-install-man:
  	$(MAKE) -C Documentation quick-install-man
  
  quick-install-html:
  	$(MAKE) -C Documentation quick-install-html

  ### Cleaning rules

  clean:

  	$(RM) $(LIB_OBJS) $(BUILTIN_OBJS) $(LIB_FILE) $(OUTPUT)perf-archive $(OUTPUT)perf.o $(LANG_BINDINGS)

  	$(RM) $(ALL_PROGRAMS) perf

  	$(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo $(OUTPUT)common-cmds.h TAGS tags cscope*

  	$(MAKE) -C Documentation/ clean

  	$(RM) $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)PERF-CFLAGS

  	$(python-clean)

  
  .PHONY: all install clean strip
  .PHONY: shell_compatibility_test please_set_SHELL_PATH_to_a_more_modern_shell

  .PHONY: .FORCE-PERF-VERSION-FILE TAGS tags cscope .FORCE-PERF-CFLAGS