*******************************************************************************
**     Building KasmVNC
*******************************************************************************


================================
Build Requirements (All Systems)
================================

-- CMake (http://www.cmake.org) v2.8 or later

-- zlib

-- If building TLS support:
   * GnuTLS 3.x
   * See "Building TLS Support" below.

-- If building native language support (NLS):
   * Gnu gettext 0.14.4 or later
   * See "Building Native Language Support" below.

-- libjpeg-turbo
   * "Normal" libjpegv6 is also supported, although it is not
     recommended as it is much slower.

-- libwebp


=========================
Build Requirements (Unix)
=========================

-- Non-Mac platforms:
   * X11 development kit

-- If building Xvnc/libvnc.so:
   * Xorg server source code, 1.7 or never
   * All build requirements Xorg imposes (see its documentation)

============================
Build Requirements (Windows)
============================

-- MinGW or MinGW-w64

-- Inno Setup (needed to build the KasmVNC installer)
   Inno Setup can be downloaded from http://www.jrsoftware.org/isinfo.php.
   You also need the Inno Setup Preprocessor, which is available in the
   Inno Setup QuickStart Pack.

   Add the directory containing iscc.exe (for instance, 
   C:\Program Files\Inno Setup 5) to the system or user PATH environment
   variable prior to building KasmVNC.


==================
Out-of-Tree Builds
==================

Binary objects, libraries, and executables are generated in the same directory
from which cmake was executed (the "binary directory"), and this directory need
not necessarily be the same as the KasmVNC source directory.  You can create
multiple independent binary directories, in which different versions of
KasmVNC can be built from the same source tree using different compilers or
settings.  In the sections below, {build_directory} refers to the binary
directory, whereas {source_directory} refers to the KasmVNC source directory.
For in-tree builds, these directories are the same.


=================
Building KasmVNC
=================


Building the KasmVNC Server on Modern Unix/Linux Systems
---------------------------------------------------------

Building the KasmVNC Server (Xvnc) is a bit trickier.  On newer systems
containing Xorg 7.4 or later (such as Fedora), Xvnc is typically built to use
the X11 shared libraries provided with the system.  The procedure for this is
system-specific, since it requires specifying such things as font directories,
but the general outline is as follows.

  > cd {build_directory}

    If performing an out-of-tree build:
  > mkdir unix
  > cp -R {source_directory}/unix/xserver unix/

  > cp -R {xorg_source}/* unix/xserver/
    (NOTE: {xorg_source} is the directory containing the Xorg source for the
    machine on which you are building KasmVNC.  The most recent versions of
    Red Hat/CentOS/Fedora, for instance, provide an RPM called
    "xorg-x11-server-source", which installs the Xorg source under
    /usr/share/xorg-x11-server-source.)

  > cd unix/xserver/
  > patch -p1 < {source_directory}/unix/xserver{version}.patch
    (where {version} matches the X server version you are building, such as
    "17" for version 1.7.x.)
  > autoreconf -fiv

  > ./configure --with-pic --without-dtrace --disable-static --disable-dri \
      --disable-xinerama --disable-xvfb --disable-xnest --disable-xorg \
      --disable-dmx --disable-xwin --disable-xephyr --disable-kdrive \
      --disable-config-dbus --disable-config-hal --disable-config-udev \
      --disable-dri2 --enable-install-libxf86config --enable-glx \
      --with-default-font-path="catalogue:/etc/X11/fontpath.d,built-ins" \
      --with-fontdir=/usr/share/X11/fonts \
      --with-xkb-path=/usr/share/X11/xkb \
      --with-xkb-output=/var/lib/xkb \
      --with-xkb-bin-directory=/usr/bin \
      --with-serverconfig-path=/usr/lib[64]/xorg \
      --with-dri-driver-path=/usr/lib[64]/dri \
      {additional configure options}
    (NOTE: This is merely an example that works with Red Hat Enterprise/CentOS
    6 and recent Fedora releases.  You should customize it for your particular
    system.  In particular, it will be necessary to customize the font, XKB,
    and DRI directories.)

  > make KASMVNC_SRCDIR={source_directory}


Building the KasmVNC Server on Legacy Unix/Linux Systems
---------------------------------------------------------

Those using systems with older versions of Xorg must build a "legacy-friendly"
version of the KasmVNC Server.  This is accomplished by downloading and
building the more recent Xorg modules in a local directory and then building
Xvnc such that it links against the local build of these libraries, not the X11
libraries installed on the system.  The "build-xorg" script in the KasmVNC
source distribution (located under contrib/xorg/) automates this process.

The following procedure will build a
"legacy-friendly" version of the KasmVNC Server:

  cd {build_directory}
  sh {source_directory}/contrib/xorg/build-xorg init
  sh {source_directory}/contrib/xorg/build-xorg build [additional CMake flags]

build-xorg generates a version of Xvnc that has no external dependencies on the
X11 shared libraries or any other distribution-specific shared libraries.  This
version of Xvnc should be transportable across multiple O/S distributions.
build-xorg should work on Red Hat Enterprise 4, its contemporaries, and later
systems.  It probably will not work on older systems.  It has not been tested
on non-Linux systems (yet).

build-xorg can also be used to rebuild just the KasmVNC Server,
once the X11 modules and other dependencies have been built for the first time.
This is convenient for testing changes that just apply to the KasmVNC source
code.  To accomplish this, run:

  sh {source_directory}/contrib/xorg/build-xorg rebuild [additional make flags]

For instance,

  sh {source_directory}/contrib/xorg/build-xorg rebuild clean

will clean the Xvnc build without destroying any of the
build configuration or module dependencies.


Debug Build
-----------

Add "-DCMAKE_BUILD_TYPE=Debug" to the CMake command line.


Portable (semi-static) Build
----------------------------

KasmVNC can under favourble circumstances be built in a way that allows
the resulting binaries to run on any system without having to also install
all the dynamic libraries it depends on. Enable this mode by adding:

  -DBUILD_STATIC=1

to the CMake command line.

Note that the method used to achieve this is very fragile and it may be
necessary to tweak cmake/StaticBuild.cmake to make things work on your
specific system.


======================================
Building TLS Support
======================================

TLS requires GnuTLS, which is supplied with most Linux distributions and
with MinGW for Windows and can be built from source on OS X and other 
Unix variants. However, GnuTLS versions > 2.12.x && < 3.3.x should be
avoided because of potential incompatibilities during initial handshaking.

You can override the GNUTLS_LIBRARY and GNUTLS_INCLUDE_DIR CMake variables
to specify the locations of libgnutls and any dependencies.  For instance,
adding

  -DGNUTLS_INCLUDE_DIR=/usr/local/include \
  -DGNUTLS_LIBRARY=/usr/local/lib/libgnutls.a

to the CMake command line would link KasmVNC against a static version of
libgnutls located under /usr/local.


======================================
Building Native Language Support (NLS)
======================================

NLS requires gettext, which is supplied with most Linux distributions and
with MinGW for Windows and which can easily be built from source on OS X and
other Unix variants.

You can override the ICONV_LIBRARIES and LIBINTL_LIBRARY CMake variables to
specify the locations of libiconv and libintl, respectively.  For instance,
adding

  -DLIBINTL_LIBRARY=/opt/gettext/lib/libintl.a

to the CMake command line would link KasmVNC against a static version of
libintl located under /opt/gettext.  Adding

  -DICONV_INCLUDE_DIR=/mingw/include \
    -DICONV_LIBRARIES=/mingw/lib/libiconv.a \
    -DGETTEXT_INCLUDE_DIR=/mingw/include \
    -DLIBINTL_LIBRARY=/mingw/lib/libintl.a

to the CMake command line would link KasmVNC against the static versions of
libiconv and libintl included in the MinGW Developer Toolkit.


===================
Installing KasmVNC
===================

You can use the build system to install KasmVNC into a directory of your
choosing.  To do this, add:

  -DCMAKE_INSTALL_PREFIX={install_directory}

to the CMake command line.  Then, you can run 'make install' to build and
install it.

If you don't specify CMAKE_INSTALL_PREFIX, then the default is
c:\Program Files\KasmVNC on Windows and /usr/local on Unix.


=========================
Creating Release Packages
=========================

The following commands can be used to create various types of release packages:


Unix
----

make tarball

  Create a binary tarball containing the utils

make servertarball

  Create a binary tarball containing both the KasmVNC Server and utils

make dmg

  Create Macintosh disk image file that contains an application bundle of the
  utils

make udmg

  On 64-bit OS X systems, this creates a version of the Macintosh package and
  disk image which contains universal i386/x86-64 binaries.  You should first
  configure a 32-bit out-of-tree build of KasmVNC, then configure a 64-bit
  out-of-tree build, then run 'make udmg' from the 64-bit build directory.  The
  build system will look for the 32-bit build under {source_directory}/osxx86
  by default, but you can override this by setting the OSX_X86_BUILD CMake
  variable to the directory containing your configured 32-bit build.  Either
  the 64-bit or 32-bit build can be configured to be backward compatible by
  using the instructions in the "Build Recipes" section.


Windows
-------

make installer

  Create a Windows installer using Inno Setup.  The installer package
  (KasmVNC[64].exe) will be located under {build_directory}.


=============
Build Recipes
=============


32-bit Build on 64-bit Linux/Unix (including OS X)
--------------------------------------------------

Set the following environment variables before building KasmVNC.

  CFLAGS='-O3 -m32'
  CXXFLAGS='-O3 -m32'
  LDFLAGS=-m32

If you are building the KasmVNC Server on a modern Unix/Linux system, then
you will also need to pass the appropriate --host argument when configuring the
X server source (for instance, --host=i686-pc-linux-gnu).


64-bit Backward-Compatible Build on 64-bit OS X
-----------------------------------------------

Add

  -DCMAKE_OSX_SYSROOT=/Developer/SDKs/MacOSX10.5.sdk \
    -DCMAKE_OSX_DEPLOYMENT_TARGET=10.5 

to the CMake command line.  The OS X 10.5 SDK must be installed.


32-bit Backward-Compatible Build on 64-bit OS X
-----------------------------------------------

Set the following environment variables:

  CC=gcc-4.0
  CXX=g++-4.0
  CFLAGS='-O3 -m32'
  CXXFLAGS='-O3 -m32'
  LDFLAGS=-m32

and add

  -DCMAKE_OSX_SYSROOT=/Developer/SDKs/MacOSX10.4u.sdk \
    -DCMAKE_OSX_DEPLOYMENT_TARGET=10.4

to the CMake command line.  The OS X 10.4 SDK must be installed.


64-bit MinGW Build on Cygwin
----------------------------

  cd {build_directory}
  CC=/usr/bin/x86_64-w64-mingw32-gcc CXX=/usr/bin/x86_64-w64-mingw32-g++ \
    RC=/usr/bin/x86_64-w64-mingw32-windres \
    cmake -G "Unix Makefiles" -DCMAKE_SYSTEM_NAME=Windows \
    -DCMAKE_AR=/usr/bin/x86_64-w64-mingw32-ar \
    -DCMAKE_RANLIB=/usr/bin/x86_64-w64-mingw32-ranlib {source_directory}
  make

This produces a 64-bit build of KasmVNC that does not depend on cygwin1.dll or
other Cygwin DLL's.  The mingw64-x86_64-gcc-core and mingw64-x86_64-gcc-g++
packages (and their dependencies) must be installed.


32-bit MinGW Build on Cygwin
----------------------------

  cd {build_directory}
  CC=/usr/bin/i686-w64-mingw32-gcc CXX=/usr/bin/i686-w64-mingw32-g++ \
    RC=/usr/bin/i686-w64-mingw32-windres \
    cmake -G "Unix Makefiles" -DCMAKE_SYSTEM_NAME=Windows \
    -DDCMAKE_AR=/usr/bin/i686-w64-mingw32-ar \
    -DCMAKE_RANLIB=/usr/bin/i686-w64-mingw32-ranlib {source_directory}
  make

This produces a 32-bit build of KasmVNC that does not depend on cygwin1.dll or
other Cygwin DLL's.  The mingw64-i686-gcc-core and mingw64-i686-gcc-g++
packages (and their dependencies) must be installed.


MinGW-w64 Build on Windows
--------------------------

This produces a 64-bit build of KasmVNC using the "native" MinGW-w64 toolchain
(which is faster than the Cygwin version):

  cd {build_directory}
  CC={mingw-w64_binary_path}/x86_64-w64-mingw32-gcc \
    CXX={mingw-w64_binary_path}/x86_64-w64-mingw32-g++ \
    RC={mingw-w64_binary_path}/x86_64-w64-mingw32-windres \
    cmake -G "MSYS Makefiles" \
    -DCMAKE_AR={mingw-w64_binary_path}/x86_64-w64-mingw32-ar \
    -DCMAKE_RANLIB={mingw-w64_binary_path}/x86_64-w64-mingw32-ranlib \
    {source_directory}
  make


MinGW Build on Linux
--------------------

  cd {build_directory}
  CC={mingw_binary_path}/i386-mingw32-gcc \
    CXX={mingw_binary_path}/i386-mingw32-g++ \
    RC={mingw_binary_path}/i386-mingw32-windres \
    cmake -G "Unix Makefiles" -DCMAKE_SYSTEM_NAME=Windows \
    -DCMAKE_AR={mingw_binary_path}/i386-mingw32-ar \
    -DCMAKE_RANLIB={mingw_binary_path}/i386-mingw32-ranlib \
    {source_directory}
  make


===============================
Distribution-Specific Packaging
===============================


RPM Packages for RHEL / CentOS
------------------------------

The RPM spec files and patches used to create the nightly builds
and releases can be found in the "contrib/rpm/el{5,6}" directories
of the KasmVNC subversion trunk.  All external source tarballs
must be fetched manually and placed into the 'SOURCES' directory
under the rpmbuild root.  Additionally, the following macros need
to be defined:

  EL6:
    %debug_package %{nil}

  EL5:
    %dist .el5
    %_smp_mflags  -j3
    %debug_package %{nil}
    %__arch_install_post   /usr/lib/rpm/check-rpaths   /usr/lib/rpm/check-buildroot


Debian packages for Ubuntu 12.04LTS
-----------------------------------
The debian folder used to create the nightly builds and releases
can be found in the "contrib/deb/ubuntu-precise" directory of the
KasmVNC subversion trunk.
