Cannot find 'ld' when using 'lld'

help
1

In an attempt to speed up linking I am trying to use the lld linker.

I have edited my .cargo/conf file to contain the following:

[target.x86_64-unknown-linux-gnu]
rustflags = ["-C", "link-args=-rdynamic", "-C", "link-arg=-fuse-ld=lld"]

I have llvm installed, although possibly relevant on Ubuntu it has installed lld as lld-10. I have symlinked /usr/bin/lld -> usr/bin/lld-10 just to make sure.

ld exists in /usr/bin/ld

However when I try to cargo build I get the error:

  = note: collect2: fatal error: cannot find ‘ld’
          compilation terminated.

Any ideas why?

2

You choose linkers not by overriding the ld command but choosing to run ld.bfd, ld.gold, ld.lld, etc.

It's the bit after the dot in ld.xyz that you specify in -fuse-ld=xyz. So just make sure that /usr/bin/ld.lld points to your linker and should be good. Something like

ln -s /usr/bin/ld.lld-* /usr/bin/ld.lld
3

Ah! Ok that seems to have done it. Many thanks!