theano.base_compiledir refers to the directory where the compiled files are stored.
Is there a way where I could permanently set theano.base_compiledir to a different location, perhaps by modifying the content of some internal Theano files ?
http://deeplearning.net/software/theano/library/config.html does explain ways for configuring theano in some aspect but I still couldn't address my question.
I am using Ubuntu.
As the documentation explains, you can set this, or any other Theano config flag, permanently by altering either the THEANO_FLAGS environment variable (e.g. in your ~/.bashrc file) or using a ~/.theanorc file.
For the former, add a line like this to your ~/.bashrc file:
export THEANO_FLAGS="base_compiledir=/some/path"
For the latter, create a ~/.theanorc file with contents that look like this:
[global]
base_compiledir=/some/path
In either case, you'll probably want to add a bunch of other flags such as device=, floatX=, etc.
If you alter your ~/.bashrc file the changes won't take effect in any active terminals unless you run source ~/.bashrc in each one or simply close the terminals and start new ones.