GCC 12 Adds Support For Using The Mold Linker

[linuxgeex]

Is there a runtime performance difference or is it all buildtime?

I haven't seen comparison benchmarks of post-linker performance, so I think any answer you get on this will be premature. However, you can be pretty sure that the resulting binary will be slower than a BOLT or LTO binary built with LDD, in the ballpark of 2-14% slower.

Maybe if enough people clamour for it, phoronix will do a article.

[geearf]

I haven't seen comparison benchmarks of post-linker performance, so I think any answer you get on this will be premature. However, you can be pretty sure that the resulting binary will be slower than a BOLT or LTO binary built with LDD, in the ballpark of 2-14% slower.

Maybe if enough people clamour for it, phoronix will do a article.

Fair point, thanks for checking!
Does this linker not support LTO?

[jstoik]

Fair point, thanks for checking!
Does this linker not support LTO?

LTO is still a work in progress: https://github.com/rui314/mold/issues/181

I tested mold on a few of my Rust projects and it did indeed improve the build times by a few seconds, but yeah, the resulting binaries were larger and slower. Still, the project has a lot of potential.

[geearf]

LTO is still a work in progress: https://github.com/rui314/mold/issues/181

I tested mold on a few of my Rust projects and it did indeed improve the build times by a few seconds, but yeah, the resulting binaries were larger and slower. Still, the project has a lot of potential.

I see, thanks!

[nanonyme]

Oh no, yet another attack on freedom! I can't wait to hear Stallman's tantrum on this one.

Come one, this is already a bad troll. mold is GNU Affero GPL. There should be absolutely no protest from Stallman on this one.
Edit: Ok, they're sunk

Note: I'm looking for a sponsor who wants to purchase the copyright

of this work and relicense it under a more liberal license such as

the MIT license. For now, mold is released under the GNU AGPL v3.

[smitty3268]

Come one, this is already a bad troll. mold is GNU Affero GPL. There should be absolutely no protest from Stallman on this one.
Edit: Ok, they're sunk

LOL. "Someone" a.k.a. please Google pay me.

[Ironmask]

Come one, this is already a bad troll. mold is GNU Affero GPL. There should be absolutely no protest from Stallman on this one.
Edit: Ok, they're sunk

Kind of reaffirms that the GPL is only used/useful for holding your own software hostage from other people.

[linuxgeex]

Fair point, thanks for checking!
Does this linker not support LTO?

No, but it may be possible to BOLT it after the fact. But if you have the patience for BOLT then you have the patience for LTO lol. P.S. BOLT only works on the binary, so you need to link it statically to get good results most of the time.

[geearf]

No, but it may be possible to BOLT it after the fact. But if you have the patience for BOLT then you have the patience for LTO lol. P.S. BOLT only works on the binary, so you need to link it statically to get good results most of the time.

I see, thank you!