Switching to Manjaro Linux and getting an AMD RX 470 to work

I’ve been a Xubuntu user for years after switching from OpenSuse. I liked its simplicity and the fact that it just worked out of the box, but I was getting more and more disappointed with Ubuntu packages being out of date, sorry, stable. Having to rebuild a bunch of packages on every install was getting a little old. Well, they did provide material for all those “build XXX on Ubuntu” posts. Recently I’ve been playing with Manjaro Linux in a VM as I had been looking for an Arch Linux based distribution that gave me the right balance between DIY and convenience. I ended up liking it so much that I did a proper bare metal install on my main desktop. The install was pretty smooth apart from a issue with getting my AMD RX 470 graphics card to work.

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Take the 10% code reduction challenge!

It might sound paradoxical, but in general, writing more code is easier than writing less code that accomplishes the same goals. Even if your code starts out clean, compact and beautiful, the code that is added later to cover the corner cases nobody thought of usually takes care of the code being well designed, elegant and beautiful. Agile programming offers a solution, namely constant refactoring, but who has time for that? That’s why I occasionally give myself the 10% code reduction challenge and I encourage you to do the same.

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Building Emacs 25.1 on Ubuntu 16.10

A reader of this blog kindly pointed out that my instructions for building Emacs 25.1 on Ubuntu 16.10 result in a core dump when the build process bootstraps emacs. I only tested the instructions on 16.04 so I hadn’t run into this issue yet.

The core dump on 16.10 appears to be a known issue and there is a workaround. Instead of running configure with just the prefix argument, run it as follows:

./configure CFLAGS=-no-pie --prefix=$HOME/local

The in-depth bug description is here in message #38. The short version is that gcc in Ubuntu 16.10 defaults to building code with -pie and this breaks Emacs. Turning off -pie results in a working executable.