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26894aac SF |
1 | # $Id: Makefile.include.header $ |
2 | ## @file | |
056a1eb7 SF |
3 | # VirtualBox Guest Additions kernel module Makefile, common parts. |
4 | # | |
5 | # (For 2.6.x, the main file must be called 'Makefile'!) | |
6 | # | |
26894aac SF |
7 | |
8 | # | |
9 | # Copyright (C) 2006-2017 Oracle Corporation | |
056a1eb7 SF |
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: | |
6d209b23 | 21 | # * Building with KERN_DIR set uses the value specified and |
056a1eb7 SF |
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> | |
056a1eb7 SF |
38 | # include $(obj)/Makefile.include.footer |
39 | # | |
40 | # The kmk kBuild define KBUILD_TARGET_ARCH is available. | |
41 | # | |
42 | ||
43 | ||
44 | # | |
45 | # First, figure out which architecture we're targeting and the build type. | |
46 | # (We have to support basic cross building (ARCH=i386|x86_64).) | |
47 | # While at it, warn about BUILD_* vars found to help with user problems. | |
48 | # | |
6d209b23 | 49 | ifeq ($(filter-out x86_64 amd64 AMD64,$(shell dpkg-architecture -qDEB_HOST_GNU_CPU)),) |
056a1eb7 SF |
50 | BUILD_TARGET_ARCH_DEF := amd64 |
51 | else | |
52 | BUILD_TARGET_ARCH_DEF := x86 | |
53 | endif | |
54 | ifneq ($(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) | |
6d209b23 | 63 | BUILD_TARGET_ARCH := x86 |
056a1eb7 | 64 | else |
6d209b23 | 65 | BUILD_TARGET_ARCH := $(BUILD_TARGET_ARCH_DEF) |
056a1eb7 SF |
66 | endif |
67 | endif | |
68 | else | |
69 | ifneq ($(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 | ||
056a1eb7 SF |
89 | ifeq ($(KERNELRELEASE),) |
90 | ||
91 | # | |
92 | # building from this directory | |
93 | # | |
94 | ||
056a1eb7 | 95 | # kernel base directory |
26894aac SF |
96 | ifdef KERN_DIR |
97 | ifndef KERN_VER | |
98 | ifeq ($(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 | |
6d209b23 | 111 | KERN_VER ?= $(shell uname -r) |
26894aac | 112 | endif |
056a1eb7 | 113 | |
6d209b23 SF |
114 | # guess kernel major version (24 or later) |
115 | ifeq ($(shell if grep '"2\.4\.' /lib/modules/$(KERN_VER)/build/include/linux/version.h > /dev/null 2>&1; then echo yes; fi),yes) | |
056a1eb7 SF |
116 | KERN_VERSION := 24 |
117 | else | |
118 | KERN_VERSION := 26 | |
119 | endif | |
120 | ||
121 | else # neq($(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 | ||
6d209b23 SF |
134 | KERN_VER := $(KERNELRELEASE) |
135 | ||
056a1eb7 SF |
136 | endif # neq($(KERNELRELEASE),) |
137 | ||
6d209b23 SF |
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. \ | |
26894aac | 142 | Specify KERN_VER=<version> (currently $(KERN_VER)) and run Make again) |
6d209b23 SF |
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 | ||
056a1eb7 SF |
150 | # debug - show guesses. |
151 | ifdef DEBUG | |
6d209b23 SF |
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)) | |
056a1eb7 | 158 | endif |