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056a1eb7 SF |
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: | |
6d209b23 | 18 | # * Building with KERN_DIR set uses the value specified and |
056a1eb7 SF |
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> | |
056a1eb7 SF |
35 | # include $(obj)/Makefile.include.footer |
36 | # | |
37 | # The kmk kBuild define KBUILD_TARGET_ARCH is available. | |
38 | # | |
39 | ||
40 | ||
41 | # | |
42 | # First, figure out which architecture we're targeting and the build type. | |
43 | # (We have to support basic cross building (ARCH=i386|x86_64).) | |
44 | # While at it, warn about BUILD_* vars found to help with user problems. | |
45 | # | |
6d209b23 | 46 | ifeq ($(filter-out x86_64 amd64 AMD64,$(shell dpkg-architecture -qDEB_HOST_GNU_CPU)),) |
056a1eb7 SF |
47 | BUILD_TARGET_ARCH_DEF := amd64 |
48 | else | |
49 | BUILD_TARGET_ARCH_DEF := x86 | |
50 | endif | |
51 | ifneq ($(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) | |
6d209b23 | 60 | BUILD_TARGET_ARCH := x86 |
056a1eb7 | 61 | else |
6d209b23 | 62 | BUILD_TARGET_ARCH := $(BUILD_TARGET_ARCH_DEF) |
056a1eb7 SF |
63 | endif |
64 | endif | |
65 | else | |
66 | ifneq ($(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 | ||
056a1eb7 SF |
86 | ifeq ($(KERNELRELEASE),) |
87 | ||
88 | # | |
89 | # building from this directory | |
90 | # | |
91 | ||
056a1eb7 | 92 | # kernel base directory |
6d209b23 | 93 | KERN_VER ?= $(shell uname -r) |
056a1eb7 | 94 | |
6d209b23 SF |
95 | # guess kernel major version (24 or later) |
96 | ifeq ($(shell if grep '"2\.4\.' /lib/modules/$(KERN_VER)/build/include/linux/version.h > /dev/null 2>&1; then echo yes; fi),yes) | |
056a1eb7 SF |
97 | KERN_VERSION := 24 |
98 | else | |
99 | KERN_VERSION := 26 | |
100 | endif | |
101 | ||
102 | else # neq($(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 | ||
6d209b23 SF |
115 | KERN_VER := $(KERNELRELEASE) |
116 | ||
056a1eb7 SF |
117 | endif # neq($(KERNELRELEASE),) |
118 | ||
6d209b23 SF |
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 | ||
056a1eb7 SF |
131 | # debug - show guesses. |
132 | ifdef DEBUG | |
6d209b23 SF |
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)) | |
056a1eb7 | 139 | endif |