= Linux build instructions =

While we try to not favor any distribution, we only build with certain distributions. This includes Debian, Ubuntu, Gentoo and Red Hat Enterprise Linux. Things should not be much different for other distributions though. If you want to supply specific build instructions (especially package names) for other distributions, please contact [wiki:Community the VirtualBox team].

== Prerequisites ==

You need: 

 * '''GCC 3.3.3 or later (except for the GCC 4.0.x series).''' GCC 4.4.1 is recommended.
 * '''as86''' (real mode assembler, usually part of the ''dev86'' or ''bin86'' package.)
 * '''bcc''' (Bruce Evans C Compiler; often part of the ''dev86'' package; only required for VBox < 4.2)
   [[BR]] ''Note:'' The bcc compiler contained in openSUSE10.2 as part of dev86-0.16.0-218 is known to generate broken code. Unfortunately, ''bcc -v'' is not supported.
 * '''IASL''' (Intel ACPI compiler)
 * '''xsltproc''' (libxslt, XML style sheet processor)
 * '''libxml2''' (required for ''VBox version >= 1.6'', XML file handling)
 * '''libxslt1''' (required for ''VBox version >= 1.6'', XML file transformation)
 * '''libXcursor''' (required to support color mouse pointers in the guest)
 * '''libxinerama'''
 * '''librandr'''
 * '''Qt 4.x.y''' (with x >= 4, including the OpenGL part, required for ''VBox version > 3.0'')
 * '''libIDL'''
 * '''libSDL''' (SDL frontend)
 * '''ALSA''' (audio backend)
 * '''!PulseAudio''' (audio backend)
 * '''libhal''' (detect host floppy/DVD)
 * '''libcap''' (CAP_NET_RAW for ICMP sockets in NAT)
 * '''libdevmapper'''
 * '''libpam0g''' (PAM support for the guest additions, required for ''VBox version >= 3.2'')
 * '''python-dev''' (Python bindings)
 * '''gsoap''' (webservice API, version 2.7.9f or higher)
 * '''Java SE 6 JDK''' (Java API bindings, both webservice and XPCOM)
 * '''Xmu''' (for OpenGL)
 * '''Mesa''' (for OpenGL)
 * '''cURL''' (version 7.16.1 or higher, required for ''VBox version >= 3.0'')
 * '''Java JDK''' (required to generate the Java bindings)
 * '''makeself''' (for creating the generic installer package, required for ''VBox version >= 4.0'')
 * '''pdflatex''' (normally provided by '''texlive-latex-base''')

On 64-bit systems you need the following packages as well:
 * '''ia32-libs''' (various libraries needed for compiling the 32-bit guest additions)
 * '''libc6-dev-i386''' (libc6 i386 development headers)
 * '''lib32gcc1''' (gcc support for i386)
 * '''gcc-multilib''' (gcc support for i386)
 * '''lib32stdc++6''' (libstdc++ for i386)
 * '''g++-multilib''' (g++ support for i386)

On Debian-based systems, the following command should install the required packages:

{{{
apt-get install gcc g++ bcc iasl xsltproc uuid-dev zlib1g-dev libidl-dev \
                libsdl1.2-dev libxcursor-dev libasound2-dev libstdc++5 \
                libhal-dev libpulse-dev libxml2-dev libxslt1-dev \
                python-dev libqt4-dev qt4-dev-tools libcap-dev \
                libxmu-dev mesa-common-dev libglu1-mesa-dev \
                linux-kernel-headers libcurl4-openssl-dev libpam0g-dev \
                libxrandr-dev libxinerama-dev libqt4-opengl-dev makeself \
                libdevmapper-dev default-jdk python-central \
                texlive-latex-base \
                texlive-latex-extra texlive-latex-recommended \
                texlive-fonts-extra texlive-fonts-recommended
}}}

 * On 64-bit Debian-based systems, the following command should install the required additional packages:
{{{
apt-get install ia32-libs libc6-dev-i386 lib32gcc1 gcc-multilib \
                lib32stdc++6 g++-multilib
}}}

On Fedora (tested with 17), the following should do:
{{{
yum install gcc-c++ libcap-devel libcurl-devel libIDL-devel libstdc++-static \
  libxslt-devel libXmu-devel openssl-devel pam-devel pulseaudio-libs-devel \
  python-devel qt-devel SDL_ttf-devel SDL-static texlive-latex wine-core \
  device-mapper-devel wget subversion subversion-gnome kernel-devel \
  glibc-static zlib-static glibc-devel.i686 libstdc++.i686 libpng-devel
}}}

To get the beramono.sty LaTeX style which is missing in Fedora (thanks to [http://forums.virtualbox.org/viewtopic.php?f=31&t=35892 Perry]):
{{{
cd /usr/share/texmf/tex/latex/
mkdir bera
cd bera/
wget http://www.tug.org/texlive/devsrc/Master/texmf-dist/tex/latex/bera/beramono.sty
texhash
}}}

On Gentoo, the following should do (sorry, not quite up to date):
{{{
emerge -av sys-devel/bin86 sys-devel/dev86 sys-power/iasl libxslt xerces-c \
           xalan-c libXcursor dev-qt/qtgui:5.6 libIDL libsdl hal alsa-lib pulseaudio \
           app-cdr/cdrtools app-arch/makeself sys-fs/lvm2
}}}

Note that !VirtualBox makes use of YASM as its assembler which is part of the source repository as the currently available releases of YASM contain various bugs. As soon as a working release becomes officially available, we will add YASM to the list of prerequisites.

== Special tweaks for 64 bit binaries ==

Building on a '''64bit''' host still requires 32bit libraries and build tools as the Guest Additions which are part of the build process are 32bit. Note that on 64bit Ubuntu systems some links to shared libraries are missing. This can be fixed with
{{{
ln -s libX11.so.6    /usr/lib32/libX11.so 
ln -s libXTrap.so.6  /usr/lib32/libXTrap.so 
ln -s libXt.so.6     /usr/lib32/libXt.so 
ln -s libXtst.so.6   /usr/lib32/libXtst.so
ln -s libXmu.so.6    /usr/lib32/libXmu.so
ln -s libXext.so.6   /usr/lib32/libXext.so
}}}

== Building !VirtualBox ==

 1. Change to the root directory of the sources and execute the configure script:
{{{
./configure --disable-hardening
}}}
 If it finds everything it needs, it will create a file called '!AutoConfig.kmk' containing paths to the various tools on your system. Also, it will create an environment setup script called `env.sh`.  This step only has to be done once (if something changes in your build tool setup, you might have to repeat it but keep in mind that both output files will be overwritten).

 The switch ''--disable-hardening'' should '''not''' be used for building packages for redistribution or for production use.

 2. Whenever you want to build !VirtualBox, you have to open a shell and source the generated environment setup script 'env.sh', i.e. do
{{{
source ./env.sh
}}}

 3. To build a release package, type
{{{
kmk all
}}}
 This produces the required binaries in `out/linux.x86/release/bin/`. If you want to build a debug version, type
{{{
kmk BUILD_TYPE=debug
}}}
 In case you have more than one CPU core, kmk will automatically do a parallel build.

 4. Running a hardened build from the bin/ directory will not work because all hardened binaries do explicit link against libraries from /opt/VirtualBox (fixed path).

== Building !VirtualBox packages for distribution ==

Never disable hardening (see previous section) when creating packages for redistribution.

To be more LSB-compliant, change the default pathes which are used by the !VirtualBox binaries to find their components. Add the following build variables to !LocalConfig.kmk:
 ''VBOX_PATH_APP_PRIVATE_ARCH := /usr/lib/virtualbox''::
  This is the application's private directory, architecture-dependent.
 ''VBOX_PATH_SHARED_LIBS := $(VBOX_PATH_APP_PRIVATE_ARCH)''::
  Where to put the shared libraries, usually the same directory as the private path as the !VirtualBox shared libraries are normally not used by any other application.
 ''VBOX_WITH_ORIGIN :=''::
  Disable ''RPATH=$ORIGIN'' and use a fixed ''RUNPATH''.
 ''VBOX_WITH_RUNPATH := $(VBOX_PATH_APP_PRIVATE_ARCH)''::
  Set ''RUNPATH'' to the directory where our shared libraries can be found.
 ''VBOX_PATH_APP_PRIVATE := /usr/share/virtualbox''::
  This is the applications's private directory, not architecture-dependent.
 ''VBOX_PATH_APP_DOCS := /usr/share/doc/virtualbox''::
  Set the directory containing the documentation. The file !VirtualBox.chm and !UserManual.pdf are searched within this directory.
 ''VBOX_WITH_TESTCASES :=''::
  Save compile time by not building the testcases.
 ''VBOX_WITH_TESTSUITE :=''::
  Save compile time by not building the testsuite.



== Running your build ==

You can run !VirtualBox directly from the build target directory (`out/linux.x86/release/bin/`) if the build was not hardened. But first of all, you must build and install the !VirtualBox kernel module, whose sources will have been copied to the build target directory. 

So, issue the following: 
{{{
cd out/linux.x86/release/bin/src
make
sudo make install
cd ..
}}}
Then it should have been installed to your modules directory and you can load it using {{{modprobe vboxdrv}}}. Make sure you give yourself read and write access to {{{/dev/vboxdrv}}}.

Finally, you can start one of the frontends, e.g.
{{{
./VirtualBox
}}}