ubuntu/vbox/vboxsf/Makefile.include.header

   1 # $Id: Makefile.include.header $
   2 ## @file
   3 # VirtualBox Guest Additions kernel module Makefile, common parts.
   4 #
   5 # (For 2.6.x, the main file must be called 'Makefile'!)
   6 #
   7
   8 #
   9 # Copyright (C) 2006-2017 Oracle Corporation
  10 #
  11 # This file is part of VirtualBox Open Source Edition (OSE), as
  12 # available from http://www.virtualbox.org. This file is free software;
  13 # you can redistribute it and/or modify it under the terms of the GNU
  14 # General Public License (GPL) as published by the Free Software
  15 # Foundation, in version 2 as it comes in the "COPYING" file of the
  16 # VirtualBox OSE distribution. VirtualBox OSE is distributed in the
  17 # hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
  18 #
  19
  20 # Testing:
  21 # * Building with KERN_DIR set uses the value specified and
  22 #   the default value for the unspecified one if any.
  23
  24 #
  25 # These file should be included by the Makefiles for any kernel modules we
  26 # build as part of the Guest Additions.  The intended way of doing this is as
  27 # follows:
  28 #
  29 # # Linux kbuild sets this to our source directory if we are called from
  30 # # there
  31 # obj ?= $(CURDIR)
  32 # include $(obj)/Makefile.include.header
  33 # MOD_NAME = <name of the module to be built, without extension>
  34 # MOD_OBJS = <list of object files which should be included>
  35 # MOD_DEFS = <any additional defines which this module needs>
  36 # MOD_INCL = <any additional include paths which this module needs>
  37 # MOD_CFLAGS = <any additional CFLAGS which this module needs>
  38 # include $(obj)/Makefile.include.footer
  39 #
  40 # The kmk kBuild define KBUILD_TARGET_ARCH is available.
  41 #
  42
  43
  44 #
  45 # First, figure out which architecture we're targeting and the build type.
  46 # (We have to support basic cross building (ARCH=i386|x86_64).)
  47 # While at it, warn about BUILD_* vars found to help with user problems.
  48 #
  49 ifeq ($(filter-out x86_64 amd64 AMD64,$(shell dpkg-architecture -qDEB_HOST_GNU_CPU)),)
  50  BUILD_TARGET_ARCH_DEF := amd64
  51 else
  52  BUILD_TARGET_ARCH_DEF := x86
  53 endif
  54 ifneq ($(filter-out amd64 x86,$(BUILD_TARGET_ARCH)),)
  55  $(warning Ignoring unknown BUILD_TARGET_ARCH value '$(BUILD_TARGET_ARCH)'.)
  56  BUILD_TARGET_ARCH :=
  57 endif
  58 ifeq ($(BUILD_TARGET_ARCH),)
  59  ifeq ($(ARCH),x86_64)
  60   BUILD_TARGET_ARCH := amd64
  61  else
  62   ifeq ($(ARCH),i386)
  63    BUILD_TARGET_ARCH := x86
  64   else
  65    BUILD_TARGET_ARCH := $(BUILD_TARGET_ARCH_DEF)
  66   endif
  67  endif
  68 else
  69  ifneq ($(BUILD_TARGET_ARCH),$(BUILD_TARGET_ARCH_DEF))
  70   $(warning Using BUILD_TARGET_ARCH='$(BUILD_TARGET_ARCH)' from the $(origin BUILD_TARGET_ARCH).)
  71  endif
  72 endif
  73
  74 ifneq ($(filter-out release profile debug strict,$(BUILD_TYPE)),)
  75  $(warning Ignoring unknown BUILD_TYPE value '$(BUILD_TYPE)'.)
  76  BUILD_TYPE :=
  77 endif
  78 ifeq ($(BUILD_TYPE),)
  79  BUILD_TYPE := release
  80 else
  81  ifneq ($(BUILD_TYPE),release)
  82   $(warning Using BUILD_TYPE='$(BUILD_TYPE)' from the $(origin BUILD_TYPE).)
  83  endif
  84 endif
  85 ifeq ($(USERNAME),)
  86  USERNAME := noname
  87 endif
  88
  89 ifeq ($(KERNELRELEASE),)
  90
  91  #
  92  # building from this directory
  93  #
  94
  95  # kernel base directory
  96  ifdef KERN_DIR
  97   ifndef KERN_VER
  98    ifeq ($(filter %/build,$(KERN_DIR)),)
  99     $(error The variable KERN_DIR must be a kernel build folder and end with /build without a trailing slash, or KERN_VER must be set)
 100    endif
 101   endif
 102  endif
 103
 104  ifndef KERN_VER
 105   ifdef KERN_DIR
 106    KERN_VER = $(notdir $(patsubst %/build,%,$(KERN_DIR)))
 107    ifeq ($(shell expr $(KERN_VER) : '[0-9]*\.[0-9]*.[0-9]*'),0)
 108     $(error The kernel build folder path must end in <version>/build, or the variable KERN_VER must be set)
 109    endif
 110   endif
 111  KERN_VER ?= $(shell uname -r)
 112  endif
 113
 114  # guess kernel major version (24 or later)
 115  ifeq ($(shell if grep '"2\.4\.' /lib/modules/$(KERN_VER)/build/include/linux/version.h > /dev/null 2>&1; then echo yes; fi),yes)
 116   KERN_VERSION := 24
 117  else
 118   KERN_VERSION := 26
 119  endif
 120
 121 else # neq($(KERNELRELEASE),)
 122
 123  #
 124  # building from kbuild (make -C <kernel_directory> M=`pwd`)
 125  #
 126
 127  # guess kernel version (24 or 26)
 128  ifeq ($(shell if echo "$(VERSION).$(PATCHLEVEL)." | grep '2\.4\.' > /dev/null; then echo yes; fi),yes)
 129   KERN_VERSION := 24
 130  else
 131   KERN_VERSION := 26
 132  endif
 133
 134  KERN_VER := $(KERNELRELEASE)
 135
 136 endif # neq($(KERNELRELEASE),)
 137
 138 # Kernel build folder
 139 KERN_DIR := $(srctree)
 140 ifneq ($(shell if test -d $(KERN_DIR); then echo yes; fi),yes)
 141  $(error Error: unable to find the headers of the Linux kernel to build against. \
 142           Specify KERN_VER=<version> (currently $(KERN_VER)) and run Make again)
 143 endif
 144 # Kernel include folder
 145 KERN_INCL := $(KERN_DIR)/include
 146 # module install folder
 147 INSTALL_MOD_DIR ?= misc
 148 MODULE_DIR := $(INSTALL_MOD_PATH)/lib/modules/$(KERN_VER)/$(INSTALL_MOD_DIR)
 149
 150 # debug - show guesses.
 151 ifdef DEBUG
 152 $(warning dbg: INSTALL_MOD_PATH = $(INSTALL_MOD_PATH))
 153 $(warning dbg: INSTALL_MOD_DIR  = $(INSTALL_MOD_DIR))
 154 $(warning dbg: KERN_DIR         = $(KERN_DIR))
 155 $(warning dbg: KERN_INCL        = $(KERN_INCL))
 156 $(warning dbg: KERN_VERSION     = $(KERN_VERSION))
 157 $(warning dbg: MODULE_DIR       = $(MODULE_DIR))
 158 endif