Where to Put CPU_FLAGS_* ?

[flysideways]

The current handbook has CPU_FLAGS_* going into a package.use file, the wiki make.conf page says either make.conf or a package.use file, people posting their make.conf's in fgo are still using make.conf ...

Is there a benefit to CPU_FLAGS_* flags being in a package.use file over make.conf? If so, what would it be?

I've spent a few hours looking about for this and am missing it, if it is discussed somewhere.

Thanks.

[rab0171610]

I don't think it is worth all this time and effort tying to find an ideal place for it. You state you spent a few hours looking for an answer to whether or not there is a benefit to putting it in one place or another. Per:
https://wiki.gentoo.org/wiki/CPU_FLAGS_*

[flysideways]

The developers make global use declarations in the profile.

The users make global use declarations in the make.conf file.

The users make persistent per-package use declarations in a package.use file, or in individual files in the package.use directory.

The users make non-persistent per-package use declarations on the command line invocation of emerge.

The */* turns a package.use file into a global declaration.

I was hoping to discover why a global declaration was now being added to a file or directory which before has been used for per-package declarations, and not the file that has historically contained global declarations.