Install on Ubuntu20.04

[track-ac]

Dear,
Thank you for your efforts.
I am trying to install this Torch on Ubuntu 20.04. But I have problems when I run 'bash install-deps'.
The problems are that 'Package 'libqt4-dev' has no installation candidate' and 'Package 'ipython' has no installation candidate'
It seems that Ubuntu 20.04 removed libqt4-dev and ipython,

I install 'libqt4-dev' with another ppa, however, I cannot find a suitable ppa for ipython on Ubuntu20.04.

Do you have any ideas?

Thank you.

[nagadomi]

I guess ipython is a package that only needs iTorch(IPython/Jupyter Notebooks kernel for Torch7). Also, iTorch is not installed by default, so ipython package might not be necessary.

[track-ac]

@nagadomi However, if I do not install the above two packages, then I cannot run bash install-dep. It will output the two packages have no installation candidate. Thus, I cannot install Torch in your repository.

[nagadomi]

I added ubuntu20.04-ppa branch.
It uses an unofficial PPA(Personal Package Archive) for qt4 ( https://launchpad.net/~rock-core/+archive/ubuntu/qt4/ ).
Unofficial packages can cause problems, so use at your own risk.

git clone https://github.com/nagadomi/distro.git -b ubuntu20.04-ppa ~/torch
./install-deps
./update.sh

I think it's better to compile qt4.8 locally just like install_openbals(). But it seems like a lot of work. Pull requests are welcome.

[track-ac]

@nagadomi Thank you very much, your branch worked for me. But another thing needs attention.
Please make sure the versions of gfortran, gcc and g++ are the same. On Ubuntu20.04, when ./install-deps, it will install gfortran version 9 that is not same with my gcc-7 g++-7 (because I use CUDA10.1 which dose not support gcc-9 ).

Thank you again for your efforts.

[nagadomi]

I didn't notice the gcc version problem because I wrote the following line in zshrc:

export CC=gcc-8
export GXX=g++-8

But the problem has been around since before. #5