= Building BOINC applications =

When building a BOINC application, you typically

 * want versions for several platforms (Windows, Mac OS X, Linux);
 * want each version to run on a wide range of volunteered computers (e.g. the Linux/x86 version should run on Linux systems of many ages and types).

Achieving these goals can be challenging. However, BOINC provides tools and example files that simplify the task.

Whether you're creating a new application or adapting an existing application to BOINC, we recommend that you start by building the BOINC sample application '''upper_case'' on all the platforms you want to support. When this is done, you can use the sample application and its associated project files as a basis for your own application.

The first step in building the sample application on a given host is to check out the boinc and boinc_samples modules on that host. Put them in the same parent directory.

== Windows ==
We use Windows XP for builds (other Windows versions may work too).

=== Microsoft Visual Studio ===
Go to boinc_samples/win_build. If you're using Visual Studio 2005, open samples.sln. If you're using Visual Studio 2003, open samples_2003.sln. Select 'Build/Build Solution', or hit F7. That's it!

There is a free version, [http://msdn2.microsoft.com/en-us/express/aa975050.aspx Visual C++ 2008 Express Edition], which works with the BOINC project file (after it is converted). You'll also need the [http://www.microsoft.com/downloads/details.aspx?FamilyId=A55B6B43-E24F-4EA3-A93E-40C0EC4F68E5&displaylang=en Microsoft Platform SDK] and some [http://msdn2.microsoft.com/en-us/express/aa700755.aspx changes to your Visual Studio Express] installation to include the SDK. Warning: you cannot use more recent versions of the SDK (which do not include glaux).

If you use your own project file:

 * It must compile BOINC .C files as C++. To do this: in Properties, see C/C++ -> Advanced -> Compile As.
 * If your application uses graphics, go to Properties -> Linker -> Input. In Delay Loaded DLLs add
{{{
GDI32.DLL;OPENGL32.DLL;GLU32.DLL
}}}
 and in Additional Dependencies add
{{{
delayimp.lib
}}}
 * Configure your project to use ANSI strings rather than Unicode.

=== Cygwin ===

In order to run a cygwin application from BOINC, you need to supply
all the cygwin DLLs that the application requires in addition to the
executable.
You can get LISTDLLS from http://www.sysinternals.com/.  It will tell
you what DLLs a running executable has loaded.

TODO: links to required software?

TODO: develop a Makefile for building uppercase under Cygwin. It can assume that the libraries in boinc/lib and boinc/api have already been built. Verify that _autosetup/configure/make work in boinc/.

Information from CERN is [https://uimon.cern.ch/twiki/bin/view/LHCAtHome/BoincPort#WinInstr here].

{{{
#!comment
=== Dev-C++ ===

[http://www.bloodshed.net/devcpp.html Dev-C++] is an open-source development environment based on the GCC compilers.

TODO: develop a project file for Dev-C++. It should be similar to the Visual Studio project file (i.e. it should include what it needs from boinc/).

SETI@home used Dev-C++ for its Windows build; you can get the [http://setiathome.berkeley.edu/cgi-bin/cvsweb.cgi/seti_boinc/client/win_build/Attic/seti_boinc.dev?rev=1.1.2.23;content-type=text%2Fplain.dev project file] on SETI CVS repository. (''outdated'').
}}}
== Mac OS X ==

Instructions for building applications on Mac OS X are on a [BuildMacApp separate page].

== Linux/x86 ==

If you build an application on a recent Linux distribution, it won't run on older Linux distributions because of library incompatibilities. The only solution we've discovered is to build applications on a host with an old Linux and an old gcc. Setting up such a host, however, is a giant pain.

Our recommended approach is not to build directly on a Linux host, but rather:

 * Install [http://www.microsoft.com/windows/virtualpc/ Microsoft Virtual PC 2004] on a Windows XP machine (preferably one that's fast and has lots of disk).
 * Download the [VirtualMachines#compatibility Compatibility] virtual machine module. This is a Debian Linux system with the appropriate (old) version of gcc.
 * Run this system under Virtual PC.
 * Install the boinc and boinc_samples modules in the same parent directory on the virtual host.
 * Build the BOINC libraries: go to the boinc/directory and type
{{{
_autosetup
./configure --disable-client --disable-server
make
}}}
 Do not 'make install'.
 * go to the boinc_samples/uppercase directory and type
{{{
ln -s `g++ -print-file-name=libstdc++.a`
make
}}}

== Other UNIX systems ==

 * [SoftwarePrereqsUnix Software prerequisites]
 * [BuildSystem configure/build]

=== GLUT notes ===

Freeglut 2.2, freeglut 2.4 and OpenGL Utility Toolkit (GLUT) libraries are supported.

=== X11 notes ===

To get the X11 support, select the relevant options when you're installing Linux, or (Redhat) go to System Settings/Add Software.