https://github.com/orsonteodoro/gcf2

My per-package cflags for Gentoo Linux
https://github.com/orsonteodoro/gcf2

Last synced: 5 days ago
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My per-package cflags for Gentoo Linux

• Host: GitHub
• URL: https://github.com/orsonteodoro/gcf2
• Owner: orsonteodoro
• Created: 2017-09-11T17:20:12.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2024-12-14T18:01:40.000Z (22 days ago)
• Last Synced: 2024-12-14T18:30:43.070Z (22 days ago)
• Language: Shell
• Size: 860 KB
• Stars: 25
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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• awesome-starred - orsonteodoro/gcf2 - My per-package cflags for Gentoo Linux (Shell)
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README

        
# gcf2

Formerly my gentoo-cflags.  gcf2 is a collection of personal cflags profiles

for the portage build system.

## Precautions

* Backup make.conf, env/*, bashrc before using gcf2.  These will be clobbered

when restoring a profile.  This can be done with `--save-profile=name`.

* It is assumed that you will make additional changes to make.conf to work with

your personal setup.

* It is a hard requirement to have a Rescue CD/USB especially with CFI ON.

[SystemRescue](https://www.system-rescue.org) can be used.

## Running

`./gcf2 --help` - Gets help

`./gcf2 --save-profile=name` - Saves profile as name

`./gcf2 --restores-profile=name` - Restores profile from profiles/name

### Environment variables

EROOT - The absolute path to the root of an existing installation.

(It can be unset or be empty if CHOST == CBUILD.)

## Prebuilt profiles

### Production

* gaming - optimizes for install time while maintaining decent runtime

performance while sacrificing security.  Anti premature optimization.

Anti security.  (Development is active)

* minmax-2018 - Hardened GCC with systemwide Retpoline with -O3.  No LTO.

* minmax-v1 - LTO based profile which can be configured for CFI.  It comes with

an blacklist/whitelist LTO generator to prevent IR incompatibilities.

(Development is End of Life [EOL])

### Development / pre-alpha

* minmax-v2 - LTO based profile with dynamically generated profiles with O(1)

MLOC estimator to auto tag packages needing Ccache or -O1, auto tag -O3 or

-Ofast based on matching keyword ebuild scans, auto disables fast-math

sub-options with violations to minimize ffast-math related bugs.  Includes

minmax-v1 LTO generators.  (Development is on ice)

## Notes

Refer to profiles//README.md or profiles//docs for more information.

Initially, it was decided to unify all profiles with minmax-v2 but at the same

time have the capability to switch between cflag profiles for seasonal reasons

like summer for gaming and winter for security.  gcf2 is created as a result.

The bashrc maybe moved or copied, and clobbered when restoring.  If you have

customizations, you need to add them back.