Disorder

h1. Installation

h2. Obtaining the Source Code

h3. Release Tarballs

Release source tarballs are available on the "Files":http://oss.squalllinesoftware.com/projects/disorder/files page.  This is what you want if you are looking for stability and something ready for production use.  You'll probably want to use the most recent version found on that page.

h3. SCM

The Disorder source code is hosted in a "Mercurial":https://www.mercurial-scm.org repository.  This is what you want if you are looking for the very latest bleeding edge of the code for contributing to Disorder, forking an evil fork, or whatever other reason you may have.

Read the "Mercurial Documentation":http://hgbook.red-bean.com/ if you aren't familiar with that and you want to go this route.

To clone the repository including the full history:

<pre>hg clone http://hg.squalllinesoftware.com/oss/disorder</pre>

h2. Prerequisites

Given the assumption that a somewhat sane build environment for C++ already exists on the build machine, the following third party things are required to build Disorder:

* "ASIO":http://think-async.com < 1.11.0

** Either the standalone version of ASIO or the one built into boost can be used.

* "Eigen":http://eigen.tuxfamily.org >= 3.0.5

* "Google Test/Mock":https://github.com/google/googletest >= 1.7.0

* One of the following geospatial conversion libraries:

** "GeographicLib":https://geographiclib.sourceforge.io >= 1.45

** C++ version of the "SEDRIS SRM":http://www.sedris.org/srm_4.4/srm_c_cpp.htm >= 4.4.0

** Patches to support other geospatial conversion libraries are welcome

* A "Python":http://www.python.org interpreter (needed to use the "waf":https://waf.io/ build system)

* A C++ compiler capable of understanding the "ISO C++ 2011 Standard":http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372

** "GCC":http://gcc.gnu.org >= 4.7.0

** "Clang++":http://clang.llvm.org >= 3.1.0

** Visual Studio >= 2013 (version 12.x)

*** If you intend to use Visual Studio to build this thing on Windows, you're going to need at least 2013.

*** The express version may work, but using it to build an open source project may be a violation of Microsoft's silly license.

*** You can, of course, use gcc to build disorder on windows in a "cygwin":http://cygwin.org/ environment, but you should expect some pain because SEDRIS won't build on cygwin out of the box.

Build and install these things in accordance with the instructions for your operating system provided by each vendor.  Some hints for certain platforms follow.

h3. Debian Linux and Derivatives

h4. Debian 6.x (Squeeze)

The binary packages in the package system are way too old.  You'll have to download the source code and build them yourself.

h4. Debian >= 7.x (Wheezy)

All the dependencies are available via the package system.  To install the Boost and Eigen build dependencies on Debian and maybe other derivatives:

<pre>sudo apt-get install libasio-dev libeigen3-dev libgeographic-dev googletest google-mock</pre>

If you don't already have python, this will get the required bits of that:

<pre>sudo apt-get install python</pre>

h2. Configuration

If everything is setup properly, this step will be a breeze, but it is important to resolve any errors produced by the configuration step prior to attempting to compile Disorder.

h3. General

The basic idea of configuration is to allow disorder to learn enough about your build platform to be able to compile.  Disorder uses the 

"waf":https://code.google.com/p/waf/ build system to configure and compile. In general terms, you want to invoke waf with the configure target like this:

<pre>./waf configure</pre>

On linux-like systems, waf will attempt to find "Boost":http://www.boost.org, "Eigen":http://eigen.tuxfamily.org, and "GLUT":http://www.opengl.org/resources/libraries/glut/ but you can override this behavior in the event of non-standard installation location or fanciful whimsy.  You will always have to tell it where to find the SEDRIS SRM however.  The options for configuring disorder's dependencies can be found by issuing the following command:

<pre>./waf --help</pre>

Said options are thusly enumerated for your convenience:

h4. Boost

|_. Option |_. Argument |_. Description |

| --boost-includes | path to the Boost includes root (eg. /opt/boost_1_49_0) | Tells disorder where to find the include files for the Boost libraries. |

| --boost-libs | path to the directory where the compiled Boost libraries are (eg. /opt/boost_1_49_0/stage/lib) | Tells disorder where to find Boost's compiled library files. |

| --boost-mt | none | Links disorder against the multi-threaded versions of the Boost libraries. |

| --boost-abi | desired tags from dgsyp | Select Boost libraries with tags.  See Boost documentation ("Unixes":http://www.boost.org/doc/libs/1_53_0/more/getting_started/unix-variants.html#library-naming, "windows":http://www.boost.org/doc/libs/1_53_0/more/getting_started/windows.html#library-naming) for more information. |

| --boost-toolset | desired toolset (eg. msvc, vc90, or gcc) | Overrides the automatic toolset detection as specified. |

h4. Eigen

|_. Option |_. Argument |_. Description |

| --eigen-root | path to the root of the Eigen library (eg. /opt/eigen-3.1.2) | Tells disorder where to find the Eigen library. |

h4. SEDRIS SRM

|_. Option |_. Argument |_. Description |

| --sedris-srm-root | path to the root of the SEDRIS SRM tree (eg. /opt/srm) | Tells disorder where to find the SEDRIS SRM.  This argument is *required*. |

| --sedris-srm-static | none | Links disorder against the static SEDRIS SRM library instead of the default dynamic one. |

| --sedris-srm-build-variant | build variant directory (eg. linux-3.5.0-sabayon-i386-gnu-/OPT) to find the compiled output files | Overrides the default selection of the first build variant found. |

h4. Google Test/Mock

|_. Option |_. Argument |_. Description |

| --gtest-src-root | path to the root of the Google Test source tree (eg. /usr/src/gtest) | Tells disorder where to find the Google Test source tree. |

| --gmock-src-root | path to the root of the Google Mock source tree (eg. /usr/src/gmock) | Tells disorder where to find the Google Mock source tree. |

h4. GLUT

|_. Option |_. Argument |_. Description |

| --glut-root | path to the root of the GLUT tree (eg. /opt/freeglut) | Tells disorder where to find GLUT. |

| --glut-lib | root name of the GLUT library | Tells disorder which GLUT library to link against.  For example, specify 'glut' for libglut.so on linux or freeglut for freeglut.lib on windows. |

h4. 0mq

|_. Option |_. Argument |_. Description |

| --zmq-root | path to the 0MQ root (eg. /opt/zeromq-4.0.4) | Tells disorder where to find 0MQ. |

h3. Linux

From inside the root of the Disorder tree do this in your favorite terminal emulator:

<pre>./waf configure --sedris-srm-root=<put the path to the SEDRIS SRM root here> --eigen-root=/opt/eigen</pre>

For example, if your SEDRIS SRM is in /opt/sedris/srm and your Eigen is in /opt/eigen:

<pre>./waf configure --sedris-srm-root=/opt/sedris/srm --eigen-root=/opt/eigen</pre>

That command will take several seconds and print a bunch of hopefully green stuff.  The output should end up looking something like this:

<pre>

Setting top to                           : /usr/local/src/disorder 

Setting out to                           : /usr/local/src/disorder/bin 

Checking for 'g++' (C++ compiler)        : /usr/bin/g++ 

Checking for program 'doxygen'           : /usr/bin/doxygen 

Checking for program 'tar'               : /bin/tar 

Checking boost includes                  : 1.62.0 

Checking boost libs                      : ok 

Checking for boost linkage               : ok 

Checking for header boost/asio.hpp       : yes 

Checking for header boost/config.hpp     : yes 

Checking for header boost/detail/endian.hpp : yes 

Checking for header boost/filesystem/operations.hpp : yes 

Checking for header boost/preprocessor.hpp          : yes 

Checking for header boost/optional.hpp              : yes 

Checking for C++11 compiler support                 : yes 

Checking for program 'pkg-config'                   : /usr/bin/pkg-config 

Checking for 'eigen3'                               : yes 

Checking for header Eigen/Dense                     : yes 

Checking for SEDRIS SRM                             : /opt/srm 

Checking for SEDRIS SRM include directory           : /opt/srm/src/include 

Checking for SEDRIS SRM library directory           : /opt/srm/lib/linux-4.9.0-2-amd64-i386-gnu-/OPT 

SEDRIS SRM library                                  : /opt/srm/lib/linux-4.9.0-2-amd64-i386-gnu-/OPT/libsrm.a 

SEDRIS SRM library mode                             : static 

Checking for header srf_all.h                       : yes 

Checking for library pthread                        : yes 

Checking for gtest source directory                 : /usr/src/googletest/googletest 

Checking for gtest-all.cc                           : /usr/src/googletest/googletest/src/gtest-all.cc 

Checking for gtest include directory                : /usr/src/googletest/googletest/include 

Checking for header gtest/gtest.h                   : yes 

Checking for gmock source directory                 : /usr/src/googletest/googlemock 

Checking for gmock-all.cc                           : /usr/src/googletest/googlemock/src/gmock-all.cc 

Checking for gmock_main.cc                          : /usr/src/googletest/googlemock/src/gmock_main.cc 

Checking for gmock include directory                : /usr/src/googletest/googlemock/include 

Checking for header gmock/gmock.h                   : yes 

Checking for library GL                             : yes 

Checking for library glut                           : yes 

Checking GLUT sanity                                : yes 

Checking for 0MQ                                    : yes 

Checking 0MQ sanity                                 : yes 

Checking for sane chrono duration modulo            : yes 

Checking for defaulted move functions               : yes 

Checking for array initializer lists                : yes 

Checking for sane std::chrono                       : yes 

'configure' finished successfully (6.832s)

</pre>

If you get an error instead of that last line saying that 'configure' finished successfully, you must fix whatever is making it unhappy and try again.

h4. Clang++

To use the "Clang":http://clang.llvm.org/ C++ compiler instead of "GCC":http://gcc.gnu.org/, assuming clang++ is installed on the build system:

<pre>CXX=<put the path to clang++ here> ./waf configure --sedris-srm-root=<put the path to the SEDRIS SRM root here></pre>

For example:

<pre>CXX=/usr/bin/clang++ ./waf configure --sedris-srm-root=/opt/sedris/srm</pre>

h3. Windows

On windows, your $PATH environment variable needs to include the path to the Python interpreter.

The easiest way to configure Disorder on Windows is to use a modified version of the provided batch file to tell Disorder where your prerequisites live.  Copy the template from @tools/windows/configure.bat@ to the root of the Disorder tree.

This file contains some variables near the middle that must be set according to your system configuration.  An example is provided in the template for guidance.

Once you are finished editing configure.bat, it's time to execute it.  From the command line:

<pre>configure.bat</pre>

If everything is successful, you should get something that looks like this:

<pre>

C:\oss\disorder>python waf configure --boost-includes=c:\oss\boost_1_48_0 --boost-libs=c:\oss\boost_1_48_0\stage\lib --boost-mt --boost-static --eigen-root=c:\oss\eigen-3.0.4 --sedris-srm-root=c:\oss\sedris\srm --sedris-srm-static

Setting top to                           : C:\oss\disorder

Setting out to                           : C:\oss\disorder\bin

Checking for 'msvc' (c++ compiler)       : c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\CL.exe

Checking for program doxygen             : not found

Checking for Eigen library               : c:\oss\eigen-3.0.4

Checking for header Eigen/Dense          : yes

Checking for SEDRIS SRM                  : c:\oss\sedris\srm

Checking for SEDRIS SRM include directory : c:\oss\sedris\srm\src\include

Checking for SEDRIS SRM library directory : c:\oss\sedris\srm\lib\[Debug/Release]

Checking for header srf_all.h             : yes

Configuring boost libraries               : debug variant

Checking boost ABI tag                    : gd

Checking boost includes                   : 1_48

Checking boost libs                       : ok

Checking for boost linkage                : ok

Checking for header boost/asio.hpp        : yes

Checking for header boost/bind.hpp        : yes

Checking for header boost/date_time.hpp   : yes

Checking for header boost/detail/endian.hpp : yes

Checking for header boost/format.hpp        : yes

Checking for header boost/function.hpp      : yes

Checking for header boost/functional/factory.hpp : yes

Checking for header boost/ptr_container/ptr_vector.hpp : yes

Checking for header boost/scoped_ptr.hpp               : yes

Checking for header boost/static_assert.hpp            : yes

Checking for header boost/thread.hpp                   : yes

Configuring boost libraries                            : optimized variant

Checking boost ABI tag                                 :

Checking boost includes                                : 1_48

Checking boost libs                                    : ok

Checking for boost linkage                             : ok

Checking for header boost/asio.hpp                     : yes

Checking for header boost/bind.hpp                     : yes

Checking for header boost/date_time.hpp                : yes

Checking for header boost/detail/endian.hpp            : yes

Checking for header boost/format.hpp                   : yes

Checking for header boost/function.hpp                 : yes

Checking for header boost/functional/factory.hpp       : yes

Checking for header boost/ptr_container/ptr_vector.hpp : yes

Checking for header boost/scoped_ptr.hpp               : yes

Checking for header boost/static_assert.hpp            : yes

Checking for header boost/thread.hpp                   : yes

'configure' finished successfully (31.262s)

</pre>

If you don't see that last line that says @'configure' finished successfully@, then something is screwed up and it needs to be fixed.  Fix it and try again.

h2. Compiling

The basic strategy for building Disorder is to invoke the waf build system with the desired build variant.

Disorder has two build variants:

* debug: produces a library that contains debugging symbols and disables most compiler optimizations

* optimized: produces a library stripped of debugging symbols and enables compiler optimizations for performance

It might be reasonable to use the @debug@ variant in a development environment and the @optimized@ variant in a production environment.

The @debug@ variant is produced by the @build_debug@ build target and the @optimized@ variant is produced by the @build_optimized@ build target.

The results of the build are put in the @bin@ subdirectory under the name of the variant.  

Both variants can coexist peacefully in the tree at the same time.

h3. Linux

On Linux, to build the Disorder @debug@ variant:

<pre>./waf build_debug</pre>

h3. Windows

On Windows, the waf script is invoked indirectly.  To build the @optimized@ variant:

<pre>python.exe waf build_optimized</pre>

h2. Ensuring Build Correctness

Due to the complexity of varied compilers and build configurations, it is imperative that you preform the necessary testing on your build to ensure that it performs correctly.

Don't fret.  It's easy and is well worth the time it takes for the peace of mind you gain.  Just tell waf to run_unit_test_<variant> like this for the @optimized@ variant:

<pre>./waf run_unit_test_optimized</pre>

That should result in something like this:

<pre>

...

[----------] Global test environment tear-down

[==========] 772 tests from 75 test cases ran. (2071 ms total)

[  PASSED  ] 772 tests.

*PASS*: All tests passed!  This silly thing actually works properly.  Hooray!

Waf: Leaving directory `/usr/local/src/disorder/bin/debug'

'run_unit_test_debug' finished successfully (2.821s)

</pre>

If you see

<pre>Something failed!  That's not good.  This build cannot be trusted until the damn thing is fixed.</pre>

in red at the bottom instead of a green "finished successfully" message, you need to file a bug report and/or fix it yourself and send in a patch.  Under no circumstances should you attempt to use a build that fails the test suite.  A test failure means disorder isn't working as expected for some reason and that reason needs to be resolved for your simulation to function properly.

h2. Building Against the Disorder Library

h3. Compiling

In order to compile your goodness against the Disorder library, you'll need to have the header files from the @src@ directory in the Disorder tree and Eigen's include directory in your compiler's include path.  You do not need anything from SEDRIS SRM in your include path.

h3. Linking

Just link your program against Disorder's static library that can be found in the @bin/<build variant>@ directory.