Re: Global modification of #:make-flags

[Ludovic Courtès]

Hi,

Marek Paśnikowski <marek@marekpasnikowski.pl> skribis:

> In order to prevent the XY problem, here is my goal: Rebuild the entire
> system with -Os optimization level.  It is an experiment into viability
> of hardware-targeted optimizations.

Instead of trying to override #:make-flags, which is likely fragile as
it depends on details of each package’s build system, I would use a
strategy similar to that of ‘--tune’.

For ‘--tune’, the ‘tuning-compiler’ procedure in (guix transformations)
produces a compiler wrapper that passes ‘-march=whatever’, and
‘tuned-package’ injects that wrapper in the package of interest.

In fact you could reuse most of the code here to do what you want.  And
we could create a package transformation for ‘-Os’.  Could be neat!

HTH!

Ludo’.