Repository navigation
Support and enable LTO by default #1978
Description
In order to reduce size and maybe increase performance, link-time-optimization could be enabled.
I tried these commands:
set RUSTFLAGS=-Clto
cargo install rustpython
I got this error:
error: cannot prefer dynamic linking when performing LTO
note: only 'staticlib', 'bin', and 'cdylib' outputs are supported with LTO
error: aborting due to previous error
error: could not compile proc-macro-hack.
To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: failed to compile rustpython v0.1.2, intermediate artifacts can be found at C:\Users\Keith\AppData\Local\Temp\cargo-installbvSdKc
Caused by:
build failed
I'm on windows. This problem seems to be with both theh Mingw and MSVC toolchains.
Activity
coolreader18 commentedon Jul 4, 2020
Try just adding the following to Cargo.toml:
That's how you generally add lto to a cargo project, I think.
Keithcat1 commentedon Aug 6, 2022
Forgot about this one. I n the meantime I elarned that you can also set the environment variable "CARGO_PROFILE_RELEASE_LTO" to "on" and that also enables LTO. Doing it with RUSTFLAGS as I did above is probably not a good idea.