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Problem with sdl 2.0.5 on Ubuntu 16

Hi! I hope this is the right place for my question.

I want to install libtcod in my computer. It requires sdl 2.0.5. But the hightest version I can install is sdl 2.0.4.

After searching for this problem, I found this thread about installing 2.0.5 on Ubuntu:
https://forum.outpost2.net/index.php?topic=5978.0

After downloading and extracting the tar.gz file from libsdl.org, do I need to put this into the Ubuntu terminal?

Code:

tar -zxvf SDL2-2.0.5.tar.gz

cd SDL2-2.0.5

./configure

make

sudo make install

cd ..

I used to make a roguelike on a Windows computer and managed to install libtcod successfully. Now I want to resume on this Ubuntu one. One problem with libtcod itself is that it only has square font. So I also would like to know if there is substitute for libtcod that doesn't require sdl 2.0.5 or has non-square font.

Which Linux distribution are you using? It looks like it may be quite outdated.

it's ubuntu 16.04 LTS

Indeed, that's three and a half years old. Have you considered updating to the next LTS, 18.04?

The computer is old too and with Ubuntu 18 it probably will become very slow. Thanks for your help, fph!

The problem, however, is now solved, though I don't quite understand the whole thing.

Yesterday I found out that somehow there was already a libtcod folder in the computer, and I could successfully import libtcod into my code. But in my Windows computer, the line was "import tcod", and it worked, and now the line has to be "import libtcod" to make it work.