Quantum GIS (QGIS)
Building QGIS from source - step by step
Sunday November 06, 2011


Last Updated: Sunday November 06, 2011
Last Change : Sunday November 06, 2011


  1. Introduction
  2. Overview
  3. Building on GNU/Linux
    3.1. Building QGIS with Qt 4.x
    3.2. Prepare apt
    3.3. Install build dependencies
    3.4. Setup ccache (Optional)
    3.5. Prepare your development environment
    3.6. Check out the QGIS Source Code
    3.7. Starting the compile
    3.8. Building Debian packages
    3.9. A practical case: Building QGIS and GRASS from source on Ubuntu with ECW and MrSID formats support
  4. Building on Windows
    4.1. Building with Microsoft Visual Studio
    4.2. Building using MinGW
    4.3. Creation of MSYS environment for compilation of Quantum GIS
  5. Building on MacOS X
    5.1. Install Qt4 from disk image
    5.2. Install development frameworks for QGIS dependencies
    5.3. Install CMake for OSX
    5.4. QGIS source
    5.5. Configure the build
    5.6. Building
  6. Authors and Acknowledgments


  1. Introduction
  ===============

This document is the original installation guide of the described software 
Quantum GIS. The software and hardware descriptions named in this 
document are in most cases registered trademarks and are therefore subject 
to the legal requirements. Quantum GIS is subject to the GNU General Public 
License. Find more information on the Quantum GIS Homepage:
http://www.qgis.org

The details, that are given in this document have been written and verified 
to the best of knowledge and responsibility of the editors. Nevertheless, 
mistakes concerning the content are possible. Therefore, all data are not 
liable to any duties or guarantees. The editors and publishers do not take 
any responsibility or liability for failures and their consequences. You are 
always welcome for indicating possible mistakes.

You can download this document as part of the Quantum GIS 'User and 
Installation Guide' in HTML and PDF format via http://www.qgis.org. A current 
version is also available at the wiki, see:
http://www.qgis.org/wiki/Installation_Guide 

Translations of this document can also be downloaded at the documentation area 
of the Quantum GIS project at http://www.qgis.org. More information is 
available via http://wiki.qgis.org/qgiswiki/DocumentationWritersCorner. 

Please visit http://qgis.org for information on joining our mailing lists 
and getting involved in the project further.

/!\ Note to document writers: Please use this document as the central
place for describing build procedures. Please do not remove this notice. 

/!\ Note to document writers: This documented is generated from 
doc/INSTALL.t2t - if you need to edit this document, be sure to edit that 
file rather than the generated INSTALL document found in the root of the 
source directory.


  2. Overview
  ===========

QGIS, like a number of major projects (eg. KDE 4.0), uses CMake
(http://www.cmake.org) for building from source.

Following a summary of the required dependencies for building:

Required build tools:

- CMake >= 2.6.2
- Flex
- Bison >= 2.4

Required build deps:

- Qt >= 4.4.0
- Proj >= 4.4.x
- GEOS >= 3.0
- Sqlite3 >= 3.0.0
- GDAL/OGR >= 1.4.x
- Qwt >= 5.0

Optional dependencies:

- for GRASS plugin - GRASS >= 6.0.0 (libraries compiled with exceptions support on Linux 32bit)
- for georeferencer - GSL >= 1.8
- for postgis support and SPIT plugin - PostgreSQL >= 8.0.x
- for gps plugin - expat >= 1.95 and gpsbabel
- for mapserver export and PyQGIS - Python >= 2.3 (2.5+ preferred)
- for python support - SIP >= 4.8, PyQt >= must match Qt version
- for qgis mapserver - FastCGI


  3. Building on GNU/Linux
  ========================


  3.1. Building QGIS with Qt 4.x
  ==============================

Requires: Ubuntu / Debian derived distro

These notes are for Ubuntu - other versions and Debian derived distros may
require slight variations in package names.

These notes are for if you want to build QGIS from source. One of the major
aims here is to show how this can be done using binary packages for *all*
dependencies - building only the core QGIS stuff from source. I prefer this
approach because it means we can leave the business of managing system packages
to apt and only concern ourselves with coding QGIS! 

This document assumes you have made a fresh install and have a 'clean' system.
These instructions should work fine if this is a system that has already been
in use for a while, you may need to just skip those steps which are irrelevant
to you.

/!\ Note: Refer to the section Building Debian packages for building 
debian packages.  Unless you plan to develop on QGIS, that is probably the
easiest option to compile and install QGIS.


  3.2. Prepare apt
  ================

The packages qgis depends on to build are available in the "universe" component
of Ubuntu. This is not activated by default, so you need to activate it:

1. Edit your /etc/apt/sources.list file.  
2. Uncomment the all the lines starting with "deb"

Also you will need to be running (K)Ubuntu 'edgy' or higher in order for 
all dependencies to be met.

Now update your local sources database:

  sudo apt-get update 


  3.3. Install build dependencies
  ===============================

  || Distribution | install command for packages |
  | lenny | ``apt-get install bison cmake doxygen flex graphviz grass-dev libexpat1-dev libfcgi-dev libgdal1-dev libgeos-dev libgsl0-dev libpq-dev libqt4-dev libqwt5-qt4-dev libsqlite3-dev pkg-config proj pyqt4-dev-tools python python-dev python-qt4 python-qt4-dev python-sip4-dev sip4 txt2tags`` |
  | lucid | ``apt-get install bison cmake doxygen flex graphviz grass-dev libexpat1-dev libfcgi-dev libgdal1-dev libgeos-dev libgsl0-dev libpq-dev libproj-dev libqt4-dev libqwt5-qt4-dev libspatialite-dev libsqlite3-dev pkg-config pyqt4-dev-tools python python-dev python-qt4 python-qt4-dev python-sip python-sip-dev txt2tags`` |
  | maverick | ``apt-get install bison cmake doxygen flex graphviz grass-dev libexpat1-dev libfcgi-dev libgdal1-dev libgeos-dev libgsl0-dev libpq-dev libproj-dev libqt4-dev libqtwebkit-dev libqwt5-qt4-dev libspatialite-dev libsqlite3-dev pkg-config pyqt4-dev-tools python python-dev python-qt4 python-qt4-dev python-sip python-sip-dev txt2tags`` |
  | natty | ``apt-get install bison cmake doxygen flex graphviz grass-dev libexpat1-dev libfcgi-dev libgdal1-dev libgeos-dev libgsl0-dev libpq-dev libproj-dev libqt4-dev libqtwebkit-dev libqwt5-qt4-dev libspatialite-dev libsqlite3-dev pkg-config pyqt4-dev-tools python python-dev python-qt4 python-qt4-dev python-sip python-sip-dev txt2tags`` |
  | sid | ``apt-get install bison cmake doxygen flex graphviz grass-dev libexpat1-dev libfcgi-dev libgdal1-dev libgeos-dev libgsl0-dev libpq-dev libproj-dev libqt4-dev libqtwebkit-dev libqwt5-qt4-dev libspatialite-dev libsqlite3-dev pkg-config pyqt4-dev-tools python python-dev python-qt4 python-qt4-dev python-sip python-sip-dev txt2tags`` |
  | squeeze | ``apt-get install bison cmake doxygen flex graphviz grass-dev libexpat1-dev libfcgi-dev libgdal1-dev libgeos-dev libgsl0-dev libpq-dev libproj-dev libqt4-dev libqwt5-qt4-dev libspatialite-dev libsqlite3-dev pkg-config pyqt4-dev-tools python python-dev python-qt4 python-qt4-dev python-sip python-sip-dev txt2tags`` |

(extracted from the respective control files in debian/)

/!\ A Special Note: If you are following this set of instructions on
a system where you already have Qt3 development tools installed, there will
be a conflict between Qt3 tools and Qt4 tools. For example, qmake will
point to the Qt3 version not the Qt4. Ubuntu Qt4 and Qt3 packages are
designed to live alongside each other. This means that for example if you
have them both installed you will have three qmake exe's:

  /usr/bin/qmake -> /etc/alternatives/qmake 
  /usr/bin/qmake-qt3
  /usr/bin/qmake-qt4 

The same applies to all other Qt binaries. You will notice above that the
canonical 'qmake' is managed by apt alternatives, so before we start to
build QGIS, we need to make Qt4 the default. To return Qt3 to default later
you can use this same process.

You can use apt alternatives to correct this so that the Qt4 version of
applications is used in all cases:

  sudo update-alternatives --config qmake
  sudo update-alternatives --config uic 
  sudo update-alternatives --config designer 
  sudo update-alternatives --config assistant 
  sudo update-alternatives --config qtconfig 
  sudo update-alternatives --config moc 
  sudo update-alternatives --config lupdate 
  sudo update-alternatives --config lrelease 
  sudo update-alternatives --config linguist 

Use the simple command line dialog that appears after running each of the
above commands to select the Qt4 version of the relevant applications.

/!\ Note: For python language bindings SIP >= 4.5 and PyQt4 >= 4.1 is required! Some stable GNU/Linux
distributions (e.g. Debian or SuSE) only provide SIP < 4.5 and PyQt4 < 4.1. To include support for python 
language bindings you may need to build and install those packages from source.


  3.4. Setup ccache (Optional)
  ============================

You should also setup ccache to speed up compile times:

  cd /usr/local/bin 
  sudo ln -s /usr/bin/ccache gcc 
  sudo ln -s /usr/bin/ccache g++ 


  3.5. Prepare your development environment
  =========================================

As a convention I do all my development work in $HOME/dev/<language>, so in
this case we will create a work environment for C++ development work like
this:

  mkdir -p ${HOME}/dev/cpp 
  cd ${HOME}/dev/cpp 

This directory path will be assumed for all instructions that follow.


  3.6. Check out the QGIS Source Code
  ===================================

There are two ways the source can be checked out. Use the anonymous method
if you do not have edit privaleges for the QGIS source repository, or use
  the developer checkout if you have permissions to commit source code
  changes.

1. Anonymous Checkout

  cd ${HOME}/dev/cpp 
  git clone git://github.com/qgis/Quantum-GIS.git

2. Developer Checkout

  cd ${HOME}/dev/cpp 
  git clone git@github.com:qgis/Quantum-GIS.git


  3.7. Starting the compile
  =========================

I compile my development version of QGIS into my ~/apps directory to avoid
conflicts with Ubuntu packages that may be under /usr. This way for example
you can use the binary packages of QGIS on your system along side with your
development version. I suggest you do something similar:

  mkdir -p ${HOME}/apps 

Now we create a build directory and run ccmake:

  cd Quantum-GIS
  mkdir build-master
  cd build-master
  ccmake ..

When you run ccmake (note the .. is required!), a menu will appear where 
you can configure various aspects of the build. If you do not have root
access or do not want to overwrite existing QGIS installs (by your
packagemanager for example), set the CMAKE_INSTALL_PREFIX to somewhere you
have write access to (I usually use ${HOME}/apps). Now press
'c' to configure, 'e' to dismiss any error messages that may appear.
and 'g' to generate the make files. Note that sometimes 'c' needs to 
be pressed several times before the 'g' option becomes available.
After the 'g' generation is complete, press 'q' to exit the ccmake 
interactive dialog.

Now on with the build:

  make
  make install

It may take a little while to build depending on your platform.

After that you can try to run QGIS:

  $HOME/apps/bin/qgis

If all has worked properly the QGIS application should start up and appear
on your screen.


  3.8. Building Debian packages
  =============================

Instead of creating a personal installation as in the previous step you can
also create debian package.  This is done from the qgis root directory, where
you'll find a debian directory.

First you need to install the debian packaging tools once:

  apt-get install build-essential

First you need to create an changelog entry for your distribution. For example for Ubuntu Lucid:

  dch -l ~lucid  --force-distribution --distribution lucid "lucid build"

The QGIS packages will be created with:

  dpkg-buildpackage -us -uc -b

/!\ Note: If dpkg-buildpackage complains about unmet build dependencies
you can install them using apt-get and re-run the command.

/!\ Note: If you have libqgis1-dev installed, you need to remove it first
using dpkg -r libqgis1-dev.  Otherwise dpkg-buildpackage will complain about a
build conflict.

The packages are created in the parent directory (ie. one level up).
Install them using dpkg.  E.g.:

  sudo debi


  3.9. A practical case: Building QGIS and GRASS from source on Ubuntu with ECW and MrSID formats support
  =======================================================================================================

The following procedure has been tested on Ubuntu 8.04, 8.10 and 9.04 32bit. If
you want to use different versions of the software (gdal, grass, qgis), just
make the necessary adjustments to the following code. This guide assumes that
you don't have installed any previous version of gdal, grass and qgis.


    3.9.1. Step 1: install base packages
    ====================================

First you need to install the necessary packages required to download the source 
code and compile it. Open the terminal and issue the following command:

  sudo apt-get install build-essential g++ subversion


    3.9.2. Step 2: compile and install the ecw libraries
    ====================================================

Go to the ERDAS web site http://www.erdas.com/ and follow the links
"'products --> ECW JPEG2000 Codec SDK --> downloads'" 
then download the "'Image Compression SDK Source Code 3.3'" (you'll need to make a registration 
and accept a license).

Uncompress the archive in a proper location (this guide assumes 
that all the downloaded source code will be placed in the user home) 
and the enter the newly created folder

  cd /libecwj2-3.3

Compile the code with the standard commands

  ./configure

then

  make

then

  sudo make install

leave the folder 

  cd ..


    3.9.3. Step 3: download the MrSID binaries
    ==========================================

Go to the LIZARDTECH web site http://www.lizardtech.com/ and follow the links
"'download --> Developer SDKs'", 
then download the "'GeoExpress SDK for Linux (x86) - gcc 4.1 32-bit'"
(you'll need to make a registration and accept a license).

Uncompress the downloaded file. The resulting directory name should be similar to "Geo_DSDK-7.0.0.2167"


    3.9.4. Step 4: compile and install the gdal libraries
    =====================================================

Download the latest gdal source code

  svn checkout https://svn.osgeo.org/gdal/trunk/gdal gdal

then copy a few files from the MrSID binaries folder to the folder with the gdal source code
('replace "USERNAME" with your actual account username')

  cp /home/USERNAME/Geo_DSDK-7.0.0.2167/include/*.* /home/USERNAME/gdal/frmts/mrsid/

enter the gdal source code folder

  cd /gdal

and run configure with a few specific parameters

  ./configure --without-grass --with-mrsid=../Geo_DSDK-7.0.0.2167 --without-jp2mrsid

at the end of the configuration process you should read something like

  ...
  GRASS support:             no
  ...
  ...
  ...
  ECW support:               yes
  MrSID support              yes      
  ...

then compile normally

  make

and

  sudo make install

finish the process by creating the necessary links to the most recent shared libraries

  sudo ldconfig

at this point you may want to check if gdal was compiled correctly with MrSID and ECW
support by issuing one (or both) of the following commands

  gdalinfo --formats | grep 'ECW'

  gdalinfo --formats | grep 'SID'

leave the folder 

  cd ..


    3.9.5. Step 5: compile and install GRASS
    ========================================

Before downloading and compile GRASS source code you need to install a few
other libraries and programs. We can do this through apt

  sudo apt-get install flex bison libreadline5-dev libncurses5-dev lesstif2-dev \
  debhelper dpatch libtiff4-dev tcl8.4-dev tk8.4-dev fftw-dev xlibmesa-gl-dev \
  libfreetype6-dev autoconf2.13 autotools-dev libgdal1-dev proj libjpeg62-dev \
  libpng12-dev libpq-dev unixodbc-dev doxygen fakeroot cmake python-dev \
  python-qt4-common python-qt4-dev python-sip4 python2.5-dev sip4 libglew1.5-dev \
  libxmu6 \ libqt4-dev libgsl0-dev python-qt4 swig python-wxversion \
  python-wxgtk2.8 libwxgtk2.8-0 libwxbase2.8-0 tcl8.4-dev tk8.4-dev tk8.4 \
  libfftw3-dev libfftw3-3

At this point we can get the GRASS source code: you may want to download it
through svn or maybe you want just to download the latest available source code
archive.  For example the GRASS 6.4rc4 is available at
http://grass.itc.it/grass64/source/grass-6.4.0RC4.tar.gz

Uncompress the archive, enter the newly created folder and run configure with a few specific parameters

  CFLAGS="-fexceptions" ./configure \
  --with-tcltk-includes=/usr/include/tcl8.4 \
  --with-proj-share=/usr/share/proj \
  --with-gdal=/usr/local/bin/gdal-config \
  --with-python=/usr/bin/python2.5-config

The additional gcc option -fexceptions is necessary to enable exceptions
support in GRASS libraries. It is currently the only way to avoid QGIS crashes
if a fatal error happens in GRASS library. See also
http://trac.osgeo.org/grass/ticket/869

Then as usual (it will take a while)

  make

and

  sudo make install

leave the folder 

  cd ..

you have now compiled and installed GRASS (also with the new wxpyhton interface) so you
may want to give it a try

  grass64 -wxpython


    3.9.6. Step 6: Compile and install QGIS
    =======================================

As for GRASS you can obtain the QGIS source code from different sources as described 
in section 2 above. Once you have the sources, create a build directory in them:

  cd Quantum-GIS
  mkdir build
  cd build

then run ccmake

  ccmake ..

Press the "c" key to do an initial configure.
Press the "c" again and the option "Press [g] to generate and exit" will appear.
Press the "g" key to generate and exit.

then as usual (it will take a while)

  make

and

  sudo make install

At the end of the process you should have QGIS and GRASS working with MrSID and ECW
raster format support.

To run QGIS just use this command 

  qgis


  4. Building on Windows
  ======================


  4.1. Building with Microsoft Visual Studio
  ==========================================

This section describes how to build QGIS using Visual Studio on Windows.  This
is currently also who the binary QGIS packages are made (earlier versions used
MinGW).

This section describes the setup required to allow Visual Studio to be used to
build QGIS. 


    4.1.1. Visual C++ Express Edition
    =================================

The free (as in free beer) Express Edition installer is available under:

  http://download.microsoft.com/download/d/c/3/dc3439e7-5533-4f4c-9ba0-8577685b6e7e/vcsetup.exe

The optional products are not necessary.  In the process the Windows SDKs for
Visual Studio 2008 will also be downloaded and installed.

You also need the Microsoft Windows ServerŪ 2003 R2 Platform SDK (for setupapi):

  http://download.microsoft.com/download/f/a/d/fad9efde-8627-4e7a-8812-c351ba099151/PSDK-x86.exe

You only need Microsoft Windows Core SDK / Build Environment (x86 32-Bit).


    4.1.2. Other tools and dependencies
    ===================================

Download and install following packages:

  || Tool | Website |
  | CMake | http://www.cmake.org/files/v2.8/cmake-2.8.4-win32-x86.exe |
  | Flex | http://gnuwin32.sourceforge.net/downlinks/flex.php |
  | Bison | http://gnuwin32.sourceforge.net/downlinks/bison.php |
  | SVN | http://sourceforge.net/projects/win32svn/files/1.6.13/Setup-Subversion-1.6.13.msi/download |
  | or GIT | http://msysgit.googlecode.com/files/Git-1.7.4-preview20110204.exe | 
  | OSGeo4W | http://download.osgeo.org/osgeo4w/osgeo4w-setup.exe |

OSGeo4W does not only provide ready packages for the current QGIS release and
nightly builds of the trunk, but also offers most of the dependencies needs to
build it.

For the QGIS build you need to install following packages from OSGeo4W (select
Advanced Installation):

- expat
- fcgi
- gdal17
- grass
- gsl-devel
- iconv
- pyqt4
- qt4-devel
- qwt5-devel-qt4
- sip

This will also select packages the above packages depend on.

Additionally QGIS also needs the include file unistd.h, which normally
doesn't exist on Windows.  It's shipped with Flex/Bison in GnuWin32\include
and needs to be copied into the VC\include directory of your Visual C++
installation.

Earlier versions of this document also covered how to build all above
dependencies.  If you're interested in that, check the history of this page in the Wiki
or the SVN repository.


    4.1.3. Setting up the Visual Studio project with CMake
    ======================================================

To start a command prompt with an environment that both has the VC++ and the OSGeo4W
variables create the following batch file (assuming the above packages were
installed in the default locations):

  @echo off
  path %SYSTEMROOT%\system32;%SYSTEMROOT%;%SYSTEMROOT%\System32\Wbem;%PROGRAMFILES%\CMake 2.8\bin;%PROGRAMFILES%\subversion\bin;%PROGRAMFILES%\GnuWin32\bin
  set PYTHONPATH=
  
  set VS90COMNTOOLS=%PROGRAMFILES%\Microsoft Visual Studio 9.0\Common7\Tools\
  call "%PROGRAMFILES%\Microsoft Visual Studio 9.0\VC\vcvarsall.bat" x86
  
  set INCLUDE=%INCLUDE%;%PROGRAMFILES%\Microsoft Platform SDK for Windows Server 2003 R2\include
  set LIB=%LIB%;%PROGRAMFILES%\Microsoft Platform SDK for Windows Server 2003 R2\lib
  
  set OSGEO4W_ROOT=C:\OSGeo4W
  call "%OSGEO4W_ROOT%\bin\o4w_env.bat"
  
  @set GRASS_PREFIX=c:/OSGeo4W/apps/grass/grass-6.4.0
  @set INCLUDE=%INCLUDE%;%OSGEO4W_ROOT%\apps\gdal-17\include;%OSGEO4W_ROOT%\include
  @set LIB=%LIB%;%OSGEO4W_ROOT%\apps\gdal-17\lib;%OSGEO4W_ROOT%\lib
  
  @cmd

Start the batch file and on the command prompt checkout the QGIS source from
git to the source directory Quantum-GIS:

  git clone git://github.com/qgis/Quantum-GIS.git

Create a 'build' directory somewhere. This will be where all the build output
will be generated.

Now run cmake-gui and in the Where is the source code: box, browse to
the top level QGIS directory.

In the Where to build the binaries: box, browse to the 'build' directory you
created.

Adjust the path to bison and flex so that the shortened C:/Progra~1 is used 
rather than C:/Program Files.

Verify that the 'BINDINGS_GLOBAL_INSTALL' option is not checked, so that python
bindings are placed into the output directory when you run the INSTALL target.

Hit Configure to start the configuration and select Visual Studio 9 2008
and keep native compilers and click Finish.

The configuration should complete without any further questions and allow you to
click Generate.

Now close cmake-gui and continue on the command prompt by starting
vcexpress.  Use File / Open / Project/Solutions and open the
qgis-x.y.z.sln File in your project directory.

Change Solution Configuration from Debug to RelWithDebInfo (Release
with Debug Info)  or Release before you build QGIS using the ALL_BUILD
target (otherwise you need debug libraries that are not included).

After the build completed you should install QGIS using the INSTALL target.

Install QGIS by building the INSTALL project. By default this will install to
c:\Program Files\qgis<version> (this can be changed by changing the
CMAKE_INSTALL_PREFIX variable in cmake-gui). 

You will also either need to add all the dependency DLLs to the QGIS install
directory or add their respective directories to your PATH.


    4.1.4. Packaging
    ================

To create a windows 'all in one' standalone  package under ubuntu (yes you
read correctly) do the following:

  sudo apt-get install nsis

Now 

  cd qgis/ms-windows/osgeo4w

And run the nsis creation script:

  creatensis.pl

When the script completes, it should have created a QGIS installer executable
in the ms-windows directory (using the QGIS binaries from OSGEO4W). 


    4.1.5. Packaging your own build of QGIS
    =======================================

Assuming you have completed the above packaging step, if you want to include
your own hand built QGIS executables, you need to copy them in from your
windows installation into the ms-windows file tree created by the creatensis
script.

  cd ms-windows/
  rm -rf osgeo4w/unpacked/apps/qgis/*
  cp -r /tmp/qgis1.7.0/* osgeo4w/unpacked/apps/qgis/

Now create a package.

  ./quickpackage.sh

After this you should now have a nsis installer containing your own build 
of QGIS and all dependencies needed to run it on a windows machine.


    4.1.6. Osgeo4w packaging
    ========================

The actual packaging process is currently not documented, for now please take a
look at:

ms-windows/osgeo4w/package.cmd


  4.2. Building using MinGW
  =========================

Note: This section might be outdated as nowadays Visual C++ is use to build
the "official" packages.

Note: For a detailed account of building all the dependencies yourself you
can visit Marco Pasetti's website here:

http://www.webalice.it/marco.pasetti/qgis+grass/BuildFromSource.html

Read on to use the simplified approach with pre-built libraries...


    4.2.1. MSYS
    ===========

MSYS provides a unix style build environment under windows. We have created a
zip archive that contains just about all dependencies.

Get this: 

http://download.osgeo.org/qgis/win32/msys.zip

and unpack to c:\msys

If you wish to prepare your msys environment yourself rather than using 
our pre-made one, detailed instructions are provided elsewhere in this
document.


    4.2.2. Qt
    =========

Download Qt opensource precompiled edition exe and install (including the
download and install of mingw) from here:

http://qt.nokia.com/downloads/

When the installer will ask for MinGW, you don't need to download and install
it, just point the installer to c:\msys\mingw

When Qt installation is complete:

Edit C:\Qt\4.7.0\bin\qtvars.bat and add the following lines:

  set PATH=%PATH%;C:\msys\local\bin;c:\msys\local\lib 
  set PATH=%PATH%;"C:\Program Files\Subversion\bin" 

I suggest you also add C:\Qt\4.7.0\bin\ to your Environment Variables Path in
the windows system preferences.

If you plan to do some debugging, you'll need to compile debug version of Qt:
C:\Qt\4.7.0\bin\qtvars.bat compile_debug

Note: there is a problem when compiling debug version of Qt 4.7, the script ends with
this message  "mingw32-make: *** No rule to make target `debug'.  Stop.". To 
compile the debug version you have to go out of src directory and execute the
following command:

  c:\Qt\4.7.0 make 


    4.2.3. Flex and Bison
    =====================

Get Flex
http://sourceforge.net/project/showfiles.php?group_id=23617&package_id=16424
(the zip bin) and extract it into c:\msys\mingw\bin


    4.2.4. Python stuff (optional)
    ==============================

Follow this section in case you would like to use Python bindings for QGIS.  To
be able to compile bindings, you need to compile SIP and PyQt4 from sources as
their installer doesn't include some development files which are necessary.


      4.2.4.1. Download and install Python - use Windows installer
      ============================================================

(It doesn't matter to what folder you'll install it)

http://python.org/download/


      4.2.4.2. Download SIP and PyQt4 sources
      =======================================

http://www.riverbankcomputing.com/software/sip/download
http://www.riverbankcomputing.com/software/pyqt/download

Extract each of the above zip files in a temporary directory. Make sure
to get versions that match your current Qt installed version.


      4.2.4.3. Compile SIP
      ====================

  c:\Qt\4.7.0\bin\qtvars.bat 
  python configure.py -p win32-g++ 
  make 
  make install 


      4.2.4.4. Compile PyQt
      =====================

  c:\Qt\4.7.0\bin\qtvars.bat 
  python configure.py 
  make 
  make install 


      4.2.4.5. Final python notes
      ===========================

/!\ You can delete the directories with unpacked SIP and PyQt4 sources after a
successfull install, they're not needed anymore.


    4.2.5. Subversion
    =================

In order to check out QGIS sources from the repository, you need Subversion
client. This installer should work fine:

http://www.sliksvn.com/pub/Slik-Subversion-1.6.13-win32.msi


    4.2.6. CMake
    ============

CMake is build system used by Quantum GIS. Download it from here:

http://www.cmake.org/files/v2.8/cmake-2.8.2-win32-x86.exe


    4.2.7. QGIS
    ===========

Start a cmd.exe window ( Start -> Run -> cmd.exe ) Create development 
directory and move into it

  md c:\dev\cpp 
  cd c:\dev\cpp 

Check out sources from SVN:

For svn trunk:

  svn co https://svn.osgeo.org/qgis/trunk/qgis 

For svn 1.5 branch

  svn co https://svn.osgeo.org/qgis/branches/Release-1_5_0 qgis1.5.0


    4.2.8. Compiling
    ================

As a background read the generic building with CMake notes at the end of 
this document.

Start a cmd.exe window ( Start -> Run -> cmd.exe ) if you don't have one
already.  Add paths to compiler and our MSYS environment:

  c:\Qt\4.7.0\bin\qtvars.bat 

For ease of use add c:\Qt\4.7.0\bin\ to your system path in system
properties so you can just type qtvars.bat when you open the cmd console.
Create build directory and set it as current directory:

  cd c:\dev\cpp\qgis 
  md build 
  cd build 


    4.2.9. Configuration
    ====================

  cmakesetup ..  

Note: You must include the '..' above.

Click 'Configure' button.  When asked, you should choose 'MinGW Makefiles' as
generator.

There's a problem with MinGW Makefiles on Win2K. If you're compiling on this
platform, use 'MSYS Makefiles' generator instead.

All dependencies should be picked up automatically, if you have set up the
Paths correctly. The only thing you need to change is the installation
destination (CMAKE_INSTALL_PREFIX) and/or set 'Debug'.

For compatibility with NSIS packaging scripts I recommend to leave the install
prefix to its default c:\program files\

When configuration is done, click 'OK' to exit the setup utility.


    4.2.10. Compilation and installation
    ====================================

   make make install 


    4.2.11. Run qgis.exe from the directory where it's installed (CMAKE_INSTALL_PREFIX)
    ===================================================================================

Make sure to copy all .dll:s needed to the same directory as the qgis.exe
binary is installed to, if not already done so, otherwise QGIS will complain
about missing libraries when started.

A possibility is to run qgis.exe when your path contains c:\msys\local\bin and
c:\msys\local\lib directories, so the DLLs will be used from that place.


    4.2.12. Create the installation package: (optional)
    ===================================================

Download and install NSIS from (http://nsis.sourceforge.net/Main_Page)

Now using windows explorer, enter the win_build directory in your QGIS source
tree. Read the READMEfile there and follow the instructions. Next right click
on qgis.nsi and choose the option 'Compile NSIS Script'. 


  4.3. Creation of MSYS environment for compilation of Quantum GIS
  ================================================================


    4.3.1. Initial setup
    ====================


      4.3.1.1. MSYS
      =============

This is the environment that supplies many utilities from UNIX world in Windows and is needed
by many dependencies to be able to compile.

Download from here:

  http://puzzle.dl.sourceforge.net/sourceforge/mingw/MSYS-1.0.11-2004.04.30-1.exe

Install to c:\msys

All stuff we're going to compile is going to get to this directory (resp. its subdirs).


      4.3.1.2. MinGW
      ==============

Download from here:

  http://puzzle.dl.sourceforge.net/sourceforge/mingw/MinGW-5.1.3.exe

Install to c:\msys\mingw

It suffices to download and install only g++ and mingw-make components.


      4.3.1.3. Flex and Bison
      =======================

Flex and Bison are tools for generation of parsers, they're needed for GRASS and also QGIS compilation.

Download the following packages:

  http://gnuwin32.sourceforge.net/downlinks/flex-bin-zip.php

  http://gnuwin32.sourceforge.net/downlinks/bison-bin-zip.php

  http://gnuwin32.sourceforge.net/downlinks/bison-dep-zip.php

Unpack them all to c:\msys\local


    4.3.2. Installing dependencies
    ==============================


      4.3.2.1. Getting ready
      ======================

Paul Kelly did a great job and prepared a package of precompiled libraries for GRASS.
The package currently includes:

- zlib-1.2.3
- libpng-1.2.16-noconfig
- xdr-4.0-mingw2
- freetype-2.3.4
- fftw-2.1.5
- PDCurses-3.1
- proj-4.5.0
- gdal-1.4.1

It's available for download here:

  http://www.stjohnspoint.co.uk/grass/wingrass-extralibs.tar.gz

Moreover he also left the notes how to compile it (for those interested):

  http://www.stjohnspoint.co.uk/grass/README.extralibs

Unpack the whole package to c:\msys\local


      4.3.2.2. GRASS
      ==============

Grab sources from CVS or use a weekly snapshot, see:

  http://grass.itc.it/devel/cvs.php

In MSYS console go to the directory where you've unpacked or checked out sources
(e.g. c:\msys\local\src\grass-6.3.cvs)

Run these commands:

  export PATH="/usr/local/bin:/usr/local/lib:$PATH"
  ./configure --prefix=/usr/local --bindir=/usr/local --with-includes=/usr/local/include --with-libs=/usr/local/lib --with-cxx --without-jpeg \
  --without-tiff --with-postgres=yes --with-postgres-includes=/local/pgsql/include --with-pgsql-libs=/local/pgsql/lib --with-opengl=windows --with-fftw \
  --with-freetype --with-freetype-includes=/mingw/include/freetype2 --without-x --without-tcltk --enable-x11=no --enable-shared=yes \
  --with-proj-share=/usr/local/share/proj
  make
  make install

It should get installed to c:\msys\local\grass-6.3.cvs

By the way, these pages might be useful:

- http://grass.gdf-hannover.de/wiki/WinGRASS_Current_Status
- http://geni.ath.cx/grass.html


      4.3.2.3. GEOS
      =============

Download the sources:

  http://geos.refractions.net/geos-2.2.3.tar.bz2

Unpack to e.g. c:\msys\local\src

To compile, I had to patch the sources: in file source/headers/timeval.h line 13.
Change it from:

  #ifdef _WIN32

to:

  #if defined(_WIN32) && defined(_MSC_VER)

Now, in MSYS console, go to the source directory and run:

  ./configure --prefix=/usr/local
  make
  make install


      4.3.2.4. SQLITE
      ===============

You can use precompiled DLL, no need to compile from source:

Download this archive:

  http://www.sqlite.org/sqlitedll-3_3_17.zip

and copy sqlite3.dll from it to c:\msys\local\lib

Then download this archive:

  http://www.sqlite.org/sqlite-source-3_3_17.zip

and copy sqlite3.h to c:\msys\local\include


      4.3.2.5. GSL
      ============

Download sources:

  ftp://ftp.gnu.org/gnu/gsl/gsl-1.9.tar.gz

Unpack to c:\msys\local\src

Run from MSYS console in the source directory:

  ./configure
  make
  make install


      4.3.2.6. EXPAT
      ==============

Download sources:

  http://dfn.dl.sourceforge.net/sourceforge/expat/expat-2.0.0.tar.gz

Unpack to c:\msys\local\src

Run from MSYS console in the source directory:

  ./configure
  make
  make install


      4.3.2.7. POSTGRES
      =================

We're going to use precompiled binaries. Use the link below for download:

  http://wwwmaster.postgresql.org/download/mirrors-ftp?file=%2Fbinary%2Fv8.2.4%2Fwin32%2Fpostgresql-8.2.4-1-binaries-no-installer.zip

copy contents of pgsql directory from the archive to c:\msys\local


    4.3.3. Cleanup
    ==============

We're done with preparation of MSYS environment. Now you can delete all stuff in c:\msys\local\src - it takes quite a lot
of space and it's not necessary at all.


  5. Building on MacOS X
  ======================

In this approach I will try to avoid as much as possible building dependencies
from source and rather use frameworks wherever possible.

The base system here is Mac OS X 10.4 (Tiger), with a single architecture
build.  Included are notes for building on Mac OS X 10.5 (Leopard), 10.6
(Snow Leopard) and 10.7 (Lion).
Make sure to read each section completely before typing the first command you see.

General note on Terminal usage:  When I say "cd" to a folder in a Terminal,
it means type "cd " (without the quotes, make sure to type a space after) and
then type the path to said folder, then <return>.  A simple way to do this
without having to know and type the full path is, after type the "cd " part,
drag the folder (use the icon in its window title bar, or drag a folder from
within a window) from the Desktop to the Terminal, then tap <return>.

Parallel Compilation: On multiprocessor/multicore Macs, it's possible to
speed up compilation, but it's not automatic.  Whenever you type "make" (but
NOT "make install"), instead type:

  make -j [n]

Replace [n] with the number of cores and/or processors your Mac has.  On recent
models with hyperthreading processors this can be double the physical count of
processors and cores.

ie: Mac Pro "8 Core" model (2 quad core processors) = 8

ie: Macbook Pro i5 (hyperthreading) = 2 cores X 2 = 4


  5.1. Install Qt4 from disk image
  ================================

You need a minimum of Qt-4.4.0. I suggest getting the latest.  There is no need
for the full Qt SDK, so save yourself some download time and get the frameworks
only.

Snow Leopard+ note: If you are building on Snow Leopard+, you will need to
decide between 32-bit support in the older Qt Carbon branch, or 64-bit
support in the Qt Cocoa branch. Appropriate installers are available for both
as of Qt-4.5.2, though they stopped making Carbon packages at Qt 4.7.4.
Qt 4.6+ is recommended for Cocoa.
Starting with Lion, Carbon may not work properly, if at all.

PPC note: The readymade Qt Cocoa installers don't include PPC support, you'd
have to compile Qt yourself.  But, there appear to be issues with Qt Cocoa on
PPC Macs anyways.  Qt Carbon is recommended on PPC Macs.

http://qt.nokia.com/downloads

If you want debug frameworks, Qt also provides a separate download with these.
These are in addition to the non-debug frameworks.

Once downloaded open the disk image and run the installer. Note you need admin
privileges to install.

Qt note: Starting in Qt 4.4, libQtCLucene was added, and in 4.5
libQtUiTools was added, both in /usr/lib.  When using a system SDK
these libraries will not be found.  To fix this problem,
add symlinks to /usr/local:

  sudo ln -s /usr/lib/libQtUiTools.a /usr/local/lib/
  sudo ln -s /usr/lib/libQtCLucene.dylib /usr/local/lib/

These should then be found automatically on Leopard and above.  Earlier systems
may need some help by adding '-L/usr/local/lib' to CMAKE_SHARED_LINKER_FLAGS,
CMAKE_MODULE_LINKER_FLAGS and CMAKE_EXE_LINKER_FLAGS in the cmake build.


  5.2. Install development frameworks for QGIS dependencies
  =========================================================

Download William Kyngesburye's excellent GDAL Complete package that includes
PROJ, GEOS, GDAL, SQLite3, Spatialite, and image libraries, as frameworks.
There is also a GSL framework.

http://www.kyngchaos.com/wiki/software/frameworks

Once downloaded, open and install the frameworks.

William provides an additional installer package for Postgresql (for PostGIS
support).  Qgis just needs the libpq client library, so unless you want to
setup the full Postgres + PostGIS server, all you need is the client-only
package.  It's available here:

http://www.kyngchaos.com/wiki/software/postgres 

Also available is a GRASS application:

http://www.kyngchaos.com/wiki/software/grass


    5.2.1. Additional Dependencies: General compatibility note
    ==========================================================

There are some additional dependencies that, at the time of writing, are not
provided as frameworks or installers so we will need to build these from source.
If you are wanting to build Qgis as a 64-bit application, you will need to 
provide the appropriate build commands to produce 64-bit support in dependencies.
Likewise, for 32-bit support on Snow Leopard, you will need to override the
default system architecture, which is 64-bit, according to instructions for
individual dependency packages.

Stable release versions are preferred.  Beta and other development versions may
have problems and you are on your own with those.


    5.2.2. Additional Dependencies: Expat
    =====================================

Snow Leopard+ note: Snow Leopard includes a usable expat, so this step is 
not necessary on Snow Leopard or Lion.

Get the expat sources:

http://sourceforge.net/project/showfiles.php?group_id=10127 

Double-click the source tarball to unpack, then, in Terminal.app, cd to the
source folder and:

  ./configure
  make 
  sudo make install 


    5.2.3. Additional Dependencies: Python
    ======================================

Leopard+ note: Starting with Leopard a usable Python is included
in the system.  This Python 2.5, 2.6 and 2.7, respectively for Leo, Snow and Lion. 
So there is no need to install Python on Leopard and newer.
You can still install Python from python.org if preferred.

If installing from python.org, make sure you install at least the latest Python
2.x from 

http://www.python.org/download/

Python 3 is a major change, and may have compatibility issues, so try it at
your own risk.


    5.2.4. Additional Dependencies: SIP
    ===================================

Retrieve the python bindings toolkit SIP from

http://www.riverbankcomputing.com/software/sip/download

Double-click the source tarball to unpack it, then, in Terminal.app,
cd to the source folder.  Then for your chosen Python:

python.org Python

  python configure.py 
  make 
  sudo make install 

Leopard system Python

SIP wants to install in the system path -- this is not a good idea.
More configuration is needed to install outside the system path:

  python configure.py -n -d /Library/Python/2.5/site-packages -b /usr/local/bin \
  -e /usr/local/include -v /usr/local/share/sip -s MacOSX10.5.sdk

Snow Leopard+ system Python

Similar to Leopard, you should install outside the system Python path.
Also, you need to specify the architecture you want (requires at least SIP
4.9), and make sure to run the versioned python binary (this one responds to
the 'arch' command, 'python' does not).
Substitute '2.7' for python version and 10.7 for SDK version below for Lion.

If you are using 32-bit Qt (Qt Carbon):

  python2.6 configure.py -n -d /Library/Python/2.6/site-packages -b /usr/local/bin \
  -e /usr/local/include -v /usr/local/share/sip --arch=i386 -s MacOSX10.6.sdk

For 64-bit Qt (Qt Cocoa), use this configure line:

  python2.6 configure.py -n -d /Library/Python/2.6/site-packages -b /usr/local/bin \
  -e /usr/local/include -v /usr/local/share/sip --arch=x86_64 -s MacOSX10.6.sdk

continue...

Then continue with compilation and installation:

  make 
  sudo make install 


    5.2.5. Additional Dependencies: PyQt
    ====================================

Retrieve the python bindings toolkit for Qt from

http://www.riverbankcomputing.com/software/pyqt/download

Double-click the source tarball to unpack it, then, in Terminal.app,
cd to the source folder.  Then for your chosen Python:

python.org Python

  python configure.py 
  yes 

Leopard system Python

PyQt wants to install in the system path -- this is not a good idea.
More configuration is needed to install outside the system path:

  python configure.py -d /Library/Python/2.5/site-packages -b /usr/local/bin

Snow Leopard+ system Python

Similar to Leopard, you should install outside the system Python path.
Also, you need to specify the architecture you want (requires at least PyQt 4.6),
and make sure to run the versioned python binary (this one responds to the
'arch' command, which is important for pyuic4, 'python' does not).
Substitute '2.7' for python version and 10.7 for SDK version below for Lion.

If you are using 32-bit Qt (Qt Carbon):

  python2.6 configure.py -d /Library/Python/2.6/site-packages -b /usr/local/bin --use-arch i386

For 64-bit Qt (Qt Cocoa), use this configure line:

  python2.6 configure.py -d /Library/Python/2.6/site-packages -b /usr/local/bin --use-arch x86_64

continue...

There is a problem with the configuration that needs to be fixed now
(it affects PyQwt compilation later).  Edit pyqtconfig.py and change the qt_dir
line to:

      'qt_dir': '/usr',

Then continue with compilation and installation (this is a good place to use
parallel compilation, if you can):

  make 
  sudo make install 

If there is a problem with undefined symbols in QtOpenGL on Leopard, edit
QtOpenGL/makefile and add -undefined dynamic_lookup to LFLAGS.
Then make again.


    5.2.6. Additional Dependencies: Qwt/PyQwt
    =========================================

The GPS tracking feature uses Qwt.  Some popular 3rd-party plugins use PyQwt.
You can take care of both with the PyQwt source from:

http://pyqwt.sourceforge.net/

Double-click the tarball to unpack it.  The following assumes PyQwt v5.2.0
(comes with Qwt 5.2.1).  Normal compilation does both Qwt and PyQwt at the same
time, but Qwt is statically linked into PyQwt, and Qgis can't use it.  So, we
need to split the build.

Now, cd into the qwt-5.2 subdir in a Terminal.  Type these commands to build
and install:

  cat >> qwtconfig.pri <<EOF
  CONFIG += release QwtDll
  EOF
  qmake -spec macx-g++
  make
  sudo make install
  sudo install_name_tool -id /usr/local/qwt-5.2.1-svn/lib/libqwt.5.dylib \
  /usr/local/qwt-5.2.1-svn/lib/libqwt.5.dylib

The Qwt shared library is now installed in /usr/local/qwt-5.x.x[-svn] (x.x is
the  minor.point version, and it may be an SVN version).  Remember this for
QGIS and PyQwt configuration.

Now for PyQwt.  Still in the Terminal (for all Pythons, except see Snow Leopard
Carbon note below):

  cd ../configure
  python configure.py --extra-include-dirs=/usr/local/qwt-5.2.1-svn/include \
  --extra-lib-dirs=/usr/local/qwt-5.2.1-svn/lib --extra-libs=qwt
  make
  sudo make install

Make sure to use the qwt install path from the Qwt build above.

Snow Leopard+ note

If using Qt Carbon, you need to specify which architectures to build, otherwise
it will default to a combination that does not work (ie x86_64 for a Carbon Qt).
This is not needed for Qt Cocoa. Configure as follows:

  python configure.py --extra-cflags="-arch i386" --extra-cxxflags="-arch i386" \
  --extra-lflags="-arch i386" --extra-include-dirs=/usr/local/qwt-5.2.1-svn/include \
  --extra-lib-dirs=/usr/local/qwt-5.2.1-svn/lib --extra-libs=qwt


    5.2.7. Additional Dependencies: Bison
    =====================================

The version of bison available by default on Mac OS X is too old so you
need to get a more recent one on your system. Download at least version 2.4 from:

  ftp.gnu.org/gnu/bison/

Now build and install it to a prefix of /usr/local. Double-click the source
tarball to unpack it, then cd to the source folder and:

  ./configure --disable-dependency-tracking CFLAGS=-Os
  make
  sudo make install 


  5.3. Install CMake for OSX
  ==========================

Get the latest source release from here:

http://www.cmake.org/cmake/resources/software.html

Binary installers are available for OS X, but they are not recommended
(2.4 versions install in /usr instead of /usr/local, and 2.6+ versions are a
strange application). Instead, download the source.
NOTE: 2.8.5 is broken for detecting part of Qt.  Fixed in 2.8.6.
Double-click the source tarball, then cd to the source folder and:

  ./bootstrap --docdir=/share/doc/CMake --mandir=/share/man
  make
  sudo make install


  5.4. QGIS source
  ================

Unzip the QGIS source tarball to a working folder of your choice
(/usr/somewhere is not a good choice as it's hidden and requires root
privileges).  If you are reading this from the source, you've already done
this.

If you want to experiment with the latest development sources, see the
CODING document.


  5.5. Configure the build
  ========================

CMake supports out of source build so we will create a 'build' dir for the
build process. OS X uses ${HOME}/Applications as a standard user app folder (it
gives it the system app folder icon).  If you have the correct permissions you
may want to build straight into your /Applications folder. The instructions
below assume you are building into a ${HOME}/Applications directory.
In a Terminal cd to the qgis source folder previously downloaded, then:

  mkdir build
  cd build
  cmake -D CMAKE_INSTALL_PREFIX=~/Applications \
  -D CMAKE_BUILD_TYPE=MinSizeRel \
  -D WITH_INTERNAL_SPATIALITE=FALSE \
  -D QWT_LIBRARY=/usr/local/qwt-5.2.1-svn/lib/libqwt.dylib \
  -D QWT_INCLUDE_DIR=/usr/local/qwt-5.2.1-svn/include \
  -D BISON_EXECUTABLE=/usr/local/bin/bison \
  ..

This will automatically find and use the previously installed frameworks, and
the GRASS application if installed.

Or, to use a Unix-style build of GRASS, use the following cmake invocation
(minimum GRASS version as stated in the Qgis requirements, substitute the GRASS
path and version as required):

  cmake -D CMAKE_INSTALL_PREFIX=~/Applications -D CMAKE_BUILD_TYPE=Release \
  -D CMAKE_BUILD_TYPE=MinSizeRel \
  -D WITH_INTERNAL_SPATIALITE=FALSE \
  -D QWT_LIBRARY=/usr/local/qwt-5.2.1-svn/lib/libqwt.dylib \
  -D QWT_INCLUDE_DIR=/usr/local/qwt-5.2.1-svn/include \
  -D GRASS_PREFIX=/user/local/grass-6.4.1 \
  -D BISON_EXECUTABLE=/usr/local/bin/bison \
  ..

Snow Leopard note: To handle 32-bit Qt (Carbon), create a 32bit python wrapper
script and add arch flags to the configuration:

  sudo cat >/usr/local/bin/python32 <<EOF
  #!/bin/sh
  exec arch -i386 /usr/bin/python2.6 \${1+"\$@"}
  EOF
  
  sudo chmod +x /usr/local/bin/python32
  
  cmake -D CMAKE_INSTALL_PREFIX=~/Applications -D \
  -D CMAKE_BUILD_TYPE=MinSizeRel \
  -D WITH_INTERNAL_SPATIALITE=FALSE \
  -D QWT_LIBRARY=/usr/local/qwt-5.2.1-svn/lib/libqwt.dylib \
  -D QWT_INCLUDE_DIR=/usr/local/qwt-5.2.1-svn/include \
  -D BISON_EXECUTABLE=/usr/local/bin/bison \
  -D CMAKE_OSX_ARCHITECTURES=i386 -D PYTHON_EXECUTABLE=/usr/local/bin/python32 \
  ..

The Qgis Mapserver feature requires fastcgi support.  This is included in
Leopard and Snow Leopard, but was dropped at Lion.  To build the Mapserver
component on Leopard and Snow, add the followling line before the last line in
the above configuration:

  -D WITH_MAPSERVER=TRUE \

On Lion you are on your own to figure out how to install libfcgi and add fcgi
support to the system Apache.  Not recommended for the average user.

Bundling note: Older Qt versions may have problems with some Qt plugins and
Qgis.  The way to handle this is to bundle Qt inside the Qgis application.  You
can do this now or wait to see if there are immediate crashes when running Qgis.
It's also a good idea to bundle Qt if you need to copy Qgis to other Macs (where
you would have to install Xcode just so Qt would install!).

To bundle Qt, add the following line before the last line (the ".." line) in
the above cmake configurations:

  -D QGIS_MACAPP_BUNDLE=1 \

Even better for distribution purposes, to also bundle any extra non-framework,
non-standard, libs (ie postgres' libpq) bump the bundle number to 2:

  -D QGIS_MACAPP_BUNDLE=2 \


  5.6. Building
  =============

Now we can start the build process (remember the parallel compilation note at
the beginning, this is a good place to use it, if you can):

  make 

If all built without errors you can then install it:

  make install 

or, for an /Applications build:

  sudo make install


  6. Authors and Acknowledgments
  ==============================

The following people have contributed to this document:

- Windows MINGW Section
 - Tim Sutton, Godofredo Contreras 2006
 - CMake additions Magnus Homann 2007
 - Python additions Martin Dobias 2007
 - With thanks to Tisham Dhar for preparing the initial msys environment

- Windows MSVC Section (Detailed install)
 - David Willis 2007
 - MSVC install additions Tim Sutton 2007
 - PostgreSQL, Qt compile, SIP, Python, AutoExp additions Juergen Fischer 2007

- Windows MSVC Section (Simplified install)
 - Tim Sutton 2007
 - Juergen Fischer 2007
 - Florian Hillen 2010

- OSX Section
 - Tim Sutton 2007
 - With special thanks to Tom Elwertowski and William Kyngesburye

- GNU/Linux Section
 - Tim Sutton 2006
 - Debian package section: Juergen Fischer 2008

