Am 07.04.20 um 14:04 schrieb Rolf Sander:

Hello Tiago,

Thanks for your reply!

...

Are you really using a 32 bit i386 CPU in 2020?

No, I have 64 bit:

dpkg --print-architecture --> amd64

I think I found the solution:

https://unix.stackexchange.com/questions/272908/apt-looking-for-i386-files-e...

Now it works fine. If other users face the same problem, maybe you could mention the following fix for /etc/apt/sources.list:

deb [ arch=amd64 ] http://downloads.skewed.de/apt DISTRIBUTION main

Thanks, I will add this to documentation.

...

Xenial is super old and does not compile graph-tool due to a lack of compiler with C++17 support.

It's really a pity that you face problems with the C++ compiler. I think that Ubuntu Xenial is still widely used. It is supported until April 2021:

https://wiki.ubuntu.com/Releases

It's out of my hands. That release is frozen in time, and it includes only GCC 5, where we need version 7 or above.

(I would upgrade if I could but the hardware on that computer doesn't allow it)

I don't believe the hardware requirements have changed from xenial to bionic.

Best, Tiago