ubuntu/vbox/vboxguest/Makefile.include.header

   1 #
   2 # VirtualBox Guest Additions kernel module Makefile, common parts.
   3 #
   4 # (For 2.6.x, the main file must be called 'Makefile'!)
   5 #
   6 # Copyright (C) 2006-2015 Oracle Corporation
   7 #
   8 # This file is part of VirtualBox Open Source Edition (OSE), as
   9 # available from http://www.virtualbox.org. This file is free software;
  10 # you can redistribute it and/or modify it under the terms of the GNU
  11 # General Public License (GPL) as published by the Free Software
  12 # Foundation, in version 2 as it comes in the "COPYING" file of the
  13 # VirtualBox OSE distribution. VirtualBox OSE is distributed in the
  14 # hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
  15 #
  16
  17 # Testing:
  18 # * Building with KERN_DIR set uses the value specified and
  19 #   the default value for the unspecified one if any.
  20
  21 #
  22 # These file should be included by the Makefiles for any kernel modules we
  23 # build as part of the Guest Additions.  The intended way of doing this is as
  24 # follows:
  25 #
  26 # # Linux kbuild sets this to our source directory if we are called from
  27 # # there
  28 # obj ?= $(CURDIR)
  29 # include $(obj)/Makefile.include.header
  30 # MOD_NAME = <name of the module to be built, without extension>
  31 # MOD_OBJS = <list of object files which should be included>
  32 # MOD_DEFS = <any additional defines which this module needs>
  33 # MOD_INCL = <any additional include paths which this module needs>
  34 # MOD_CFLAGS = <any additional CFLAGS which this module needs>
  35 # include $(obj)/Makefile.include.footer
  36 #
  37 # The kmk kBuild define KBUILD_TARGET_ARCH is available.
  38 #
  39
  40
  41 #
  42 # First, figure out which architecture we're targeting and the build type.
  43 # (We have to support basic cross building (ARCH=i386|x86_64).)
  44 # While at it, warn about BUILD_* vars found to help with user problems.
  45 #
  46 ifeq ($(filter-out x86_64 amd64 AMD64,$(shell dpkg-architecture -qDEB_HOST_GNU_CPU)),)
  47  BUILD_TARGET_ARCH_DEF := amd64
  48 else
  49  BUILD_TARGET_ARCH_DEF := x86
  50 endif
  51 ifneq ($(filter-out amd64 x86,$(BUILD_TARGET_ARCH)),)
  52  $(warning Ignoring unknown BUILD_TARGET_ARCH value '$(BUILD_TARGET_ARCH)'.)
  53  BUILD_TARGET_ARCH :=
  54 endif
  55 ifeq ($(BUILD_TARGET_ARCH),)
  56  ifeq ($(ARCH),x86_64)
  57   BUILD_TARGET_ARCH := amd64
  58  else
  59   ifeq ($(ARCH),i386)
  60    BUILD_TARGET_ARCH := x86
  61   else
  62    BUILD_TARGET_ARCH := $(BUILD_TARGET_ARCH_DEF)
  63   endif
  64  endif
  65 else
  66  ifneq ($(BUILD_TARGET_ARCH),$(BUILD_TARGET_ARCH_DEF))
  67   $(warning Using BUILD_TARGET_ARCH='$(BUILD_TARGET_ARCH)' from the $(origin BUILD_TARGET_ARCH).)
  68  endif
  69 endif
  70
  71 ifneq ($(filter-out release profile debug strict,$(BUILD_TYPE)),)
  72  $(warning Ignoring unknown BUILD_TYPE value '$(BUILD_TYPE)'.)
  73  BUILD_TYPE :=
  74 endif
  75 ifeq ($(BUILD_TYPE),)
  76  BUILD_TYPE := release
  77 else
  78  ifneq ($(BUILD_TYPE),release)
  79   $(warning Using BUILD_TYPE='$(BUILD_TYPE)' from the $(origin BUILD_TYPE).)
  80  endif
  81 endif
  82 ifeq ($(USERNAME),)
  83  USERNAME := noname
  84 endif
  85
  86 ifeq ($(KERNELRELEASE),)
  87
  88  #
  89  # building from this directory
  90  #
  91
  92  # kernel base directory
  93  KERN_VER ?= $(shell uname -r)
  94
  95  # guess kernel major version (24 or later)
  96  ifeq ($(shell if grep '"2\.4\.' /lib/modules/$(KERN_VER)/build/include/linux/version.h > /dev/null 2>&1; then echo yes; fi),yes)
  97   KERN_VERSION := 24
  98  else
  99   KERN_VERSION := 26
 100  endif
 101
 102 else # neq($(KERNELRELEASE),)
 103
 104  #
 105  # building from kbuild (make -C <kernel_directory> M=`pwd`)
 106  #
 107
 108  # guess kernel version (24 or 26)
 109  ifeq ($(shell if echo "$(VERSION).$(PATCHLEVEL)." | grep '2\.4\.' > /dev/null; then echo yes; fi),yes)
 110   KERN_VERSION := 24
 111  else
 112   KERN_VERSION := 26
 113  endif
 114
 115  KERN_VER := $(KERNELRELEASE)
 116
 117 endif # neq($(KERNELRELEASE),)
 118
 119 # Kernel build folder
 120 KERN_DIR := $(srctree)
 121 ifneq ($(shell if test -d $(KERN_DIR); then echo yes; fi),yes)
 122  $(error Error: unable to find the headers of the Linux kernel to build against. \
 123           Specify KERN_VER=<version> and run Make again)
 124 endif
 125 # Kernel include folder
 126 KERN_INCL := $(KERN_DIR)/include
 127 # module install folder
 128 INSTALL_MOD_DIR ?= misc
 129 MODULE_DIR := $(INSTALL_MOD_PATH)/lib/modules/$(KERN_VER)/$(INSTALL_MOD_DIR)
 130
 131 # debug - show guesses.
 132 ifdef DEBUG
 133 $(warning dbg: INSTALL_MOD_PATH = $(INSTALL_MOD_PATH))
 134 $(warning dbg: INSTALL_MOD_DIR  = $(INSTALL_MOD_DIR))
 135 $(warning dbg: KERN_DIR         = $(KERN_DIR))
 136 $(warning dbg: KERN_INCL        = $(KERN_INCL))
 137 $(warning dbg: KERN_VERSION     = $(KERN_VERSION))
 138 $(warning dbg: MODULE_DIR       = $(MODULE_DIR))
 139 endif