[Octave-bug-tracker] [bug #52150] all plot functions throw errors when built with --without-fontconfig

[Pantxo Diribarne]

Follow-up Comment #1, bug #52150 (project octave):

What do we want to do when we have no way to locate a font due to missing
fontconfig support:
* Simply silence those warning after they have been thrown once
* Fallback to using gnuplot, in which case the build script should consider
equivalence between "--without-fontconfig" and "--without-opengl"
* Ship a default font file with Octave install. Probably a sans serif,
Helvetica compatible and ideally full featured (in the sense that it should
provide all TeX symbols that we use) 

The first solution, which leaves the user with text free plots looks
ridiculous, but very simple to implement.
The second solution is also very simple I guess (once you know the build
system).
The third one has the advantage that we can use a consistent, full featured,
default font on every system.

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