Initial add of cloog needed for gcc
Inital add of isl needed for gcc
Initial add of mpc needed for gcc
Initial add of gcc compiler suite
cloog: expose pkgconfig and bin paths

cloog uses pkgconfig and has a binary which might be used when it's
called as a build depenendency.
gcc: parameterise the configuration step

Building gcc on OSX 10.9 and Ubuntu Precise (64bit) appears to be have
differently. So breaking out the configurations for each platform.
gcc: Parameterise gcc package

Use a python script to try and deal with Linux/OSX differences and also
problems with LD_LIBRARY_PATH.
gcc: Comment reasoning for the flags used
gcc: Don't use LD_LIBRARY_PATH during build

Tell configure about boot and stage1 ldflags to avoid the usage of
LD_LIBRARY_PATH.
gcc: Tell compiled gcc where to look for headers

This option tries to build a gcc install that is more insulated from
the system.
gcc: Set non-relocatable
gcc: Ensure libraries get installed into lib

By default gcc installs 64bit libraries into lib64, we change it here
to install into lib instead.
gcc: Record some information after a build

Record lookup paths that gcc is built with so user can look up its
behaviour if needed.
gcc: Fix typo in check
gcc: Comment out checks

Checks were used during building gcc package on ubuntu precise
gcc: Restore behaviour on OSX build
gcc: When a build dep, expose the bin directory
Update eigen to 3.2.1
Merge pull request #379 from hashdist/eigen

Update eigen to 3.2.1
Update QT to 4.8.6

The current version can't be downloaded any more:

Downloading http://download.qt-project.org/official_releases/qt/4.8/4.8.5/qt-everywhere-opensource-src-4.8.5.tar.gz...
[ERROR] urllib failed to download (code: 404): http://download.qt-project.org/official_releases/qt/4.8/4.8.5/qt-everywhere-opensource-src-4.8.5.tar.gz

And the new version 5.3.1 doesn't compile with the current build script.