Fedora 31 Looking At Making It Easy To Use LLVM's LLD Linker

[phoronix]

Phoronix: Fedora 31 Looking At Making It Easy To Use LLVM's LLD Linker

Another late change proposal coming in for Fedora 31 is to allow update-alternatives to optionally point /usr/bin/ld as the default linker to /usr/bin/lld for the LLVM linker...

http://www.phoronix.com/scan.php?page=news_item&px=Fedora-31-Possible-LLD-Support

[FireBurn]

I've struggled to get lld to work properly on my system, gold usually works fine

There's been an ongoing discussion on the LKML about removing support for gold entirely

[re:fi.64]

I've struggled to get lld to work properly on my system, gold usually works fine

There's been an ongoing discussion on the LKML about removing support for gold entirely

I'd highly encourage you to file any bugs for these issues, it'll be worth it. lld nearly halved the LTO link time over gold for one of my projects (it requires Skia which can be quite large).

[pal666]

The LLVM Linker is known for being a drop-in replacement to the GNU linkers while generally being much faster

gnu linkers are not even drop-in replacements to themselves outside of trivial cases

[pal666]

lld nearly halved the LTO link time over gold for one of my projects (it requires Skia which can be quite large).

that's interesting. i thought most of lto time is spent by compiler. let me guess, your lto comparison included switching compilers? at least it doesn't mention supporting of non-clang lto

[re:fi.64]

that's interesting. i thought most of lto time is spent by compiler. let me guess, your lto comparison included switching compilers? at least it doesn't mention supporting of non-clang lto

I'm not sure what the reason was, but both definitely took place with the same Clang version with the same flags; the only difference was -fuse-ld=lld.

[pal666]

I'm not sure what the reason was, but both definitely took place with the same Clang version with the same flags; the only difference was -fuse-ld=lld.

maybe clang's support of gold plugin was half-baked. i'd like to see comparison of lld+gcc vs gold+gcc but it doesn't look like first combination is possible

[re:fi.64]

maybe clang's support of gold plugin was half-baked. i'd like to see comparison of lld+gcc vs gold+gcc but it doesn't look like first combination is possible

GCC actually finally added it (maybe partly since some distros were shipping the patch anyway), though wouldn't there potentially be a similar issue with not-as-oft-used plugins?

That being said, I believe Clang + gold was pretty extensively used at Google (they created gold after all) until lld came along.