Step 1: Boost

This step is completely optional, as boost is not a required dependency. I'm planning on using multi-threading and a whole host of boost libraries. See the post Building boost on MinGW. Note: I build everything in boost, rather than just the bare minimum required for multi-threading.

Step 2: Ogre Dependencies

1. Get a bitbucket account if you don't already have one. Add your ssh pub key to the account - there are instructions on the bitbucket site, if you don't already know how to do this. You can use https instead of ssh, but modify the URL passed to hg clone accordingly.
2. Fetch the source code.

export OGRE_SOURCE_DIR=~/external/ogre/v1-8
mkdir -p $OGRE_SOURCE_DIR
cd $OGRE_SOURCE_DIR
hg clone ssh://hg@bitbucket.org/cabalistic/ogredeps
export OGREDEPS_SOURCE_DIR=$OGRE_SOURCE_DIR/ogredeps

1. Set up some environment vars and build the deps:

export BUILD_OUTPUT_DIR=~/build/output
export OGRE_OUTPUT_DIR=$BUILD_OUTPUT_DIR/ogre/v1-8
export OGREDEPS_OUTPUT_DIR=$OGRE_OUTPUT_DIR/ogredeps
export BUILD_INSTALL_DIR=~/build/install
export OGREDEPS_INSTALL_DIR=$BUILD_INSTALL_DIR/ogredeps
mkdir -p $OGREDEPS_OUTPUT_DIR
cd $OGREDEPS_OUTPUT_DIR

1. If you're using MinGW under MSYS:

cmake $OGREDEPS_SOURCE_DIR -G "MSYS Makefiles"

or if you're using MinGW without MSYS:

cmake $OGREDEPS_SOURCE_DIR -G "MinGW Makefiles"

make
mkdir $BUILD_INSTALL_DIR
make install
mv ogredeps $OGREDEPS_INSTALL_DIR

Step 3: Ogre SDK

This is rather similar to building the dependencies.

1. Fetch the source code.

export OGRE_SOURCE_DIR=~/external/ogre/v1-8
mkdir -p $OGRE_SOURCE_DIR
cd $OGRE_SOURCE_DIR
hg clone ssh://hg@bitbucket.org/sinbad/ogre
export OGRESDK_SOURCE_DIR=$OGRE_SOURCE_DIR/ogre

1. We need to tell Ogre where boost is:

export BOOST_ROOT=~/build/install/boost_1_51_0
export BOOST_INCLUDEDIR=$BOOST_ROOT/include/boost-1_51
export BOOST_LIBRARYDIR=$BOOST_ROOT/library

On posix systems, you don't need to set BOOST_INCLUDEDIR or BOOST_LIBRARYDIR, but if you do set them, BOOST_INCLUDEDIR should be set as follows: export BOOST_INCLUDEDIR=$BOOST_ROOT/include

1. And where the dependencies are: export OGRE_DEPENDENCIES_DIR=~/build/install/ogredeps
2. Set up some environment vars for build and install locations:

export BUILD_OUTPUT_DIR=~/build/output
export OGRE_OUTPUT_DIR=$BUILD_OUTPUT_DIR/ogre/v1-8
export OGRESDK_OUTPUT_DIR=$OGRE_OUTPUT_DIR/ogre
export BUILD_INSTALL_DIR=~/build/install
export OGRESDK_INSTALL_DIR=$BUILD_INSTALL_DIR/ogre
mkdir -p $OGRESDK_OUTPUT_DIR
cd $OGRESDK_OUTPUT_DIR

1. If you're using MinGW under MSYS:

cmake $OGRESDK_SOURCE_DIR -G "MSYS Makefiles"

orif you're using MinGW without MSYS:

cmake $OGRESDK_SOURCE_DIR -G "MinGW Makefiles"

make
mkdir $BUILD_INSTALL_DIR
make install
mv sdk $OGRESDK_INSTALL_DIR

At this point, you should have your boost stuff in #!bash ~/build/install/boost_1_51_0, ogre dependencies in #!bash ~/build/install/ogredeps and the ogre sdk in

To build applications, simply add the relevant include and library paths to the compiler and
linker options. On posix systems, add the bin directories to LD_LIBRARY_PATH environment variable.
On Windows and MinGW, add the bin directories to the PATH environment variable.