please consider to add lto useflag to app-emulation/dxvk #10

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stefson · 2020-10-23T09:27:59+02:00

stefson commented

2020-10-23 09:27:59 +02:00

recently I learned about link time optimization. Do you think it's possible to add a useflag to the dxvk ebuild? This way it might be possible to squeeze out a bit more performance at runtime.

sources:

https://bugs.gentoo.org/745372#c13

recently I learned about link time optimization. Do you think it's possible to add a useflag to the dxvk ebuild? This way it might be possible to squeeze out a bit more performance at runtime. sources: https://bugs.gentoo.org/745372#c13

tastytea commented

2020-10-23 10:02:19 +02:00

I think it would make more sense if you add the flag to your make.conf or /etc/portage/package.env?

I'm reluctant to directly support it because upstream doesn't use it and has no option in its build system for it.

If you write something like CXXFLAGS="${CXXFLAGS} -flto" to /etc/portage/env/use_flto.conf and app-emulation/dxvk use_flto.conf to /etc/portage/package.env/dxvk it should work.

I think it would make more sense if you add the flag to your make.conf or [`/etc/portage/package.env`](https://wiki.gentoo.org/wiki//etc/portage/package.env)? I'm reluctant to directly support it because [upstream doesn't use it](https://github.com/doitsujin/dxvk/issues/1782#issuecomment-701280398) and has no option in its build system for it. If you write something like `CXXFLAGS="${CXXFLAGS} -flto"` to `/etc/portage/env/use_flto.conf` and `app-emulation/dxvk use_flto.conf` to `/etc/portage/package.env/dxvk` it should work.

stefson commented

2020-10-24 15:28:40 +02:00

uhm, ok, I thought the use of lto is so widespread that upstream supports it out of the box.