Enable LTO via cargo profile setting

[link2xt]

RUSTFLAGS results in
error: lto can only be run for executables, cdylibs and static library outputs

Upstream issue: rust-lang/cargo#6375

Fixes #2144

[link2xt]

This breaks the build even for core v1.136.6 somehow:

ld: warning: Could not find or use auto-linked framework 'CoreAudioTypes': framework 'CoreAudioTypes' not found
Undefined symbols for architecture x86_64:
  "_kSCNetworkInterfaceTypeIrDA", referenced from:
      system_configuration::network_configuration::SCNetworkInterfaceType::from_cfstring::hd83cc6f7010dfe05 in libdeltachat.a[x86_64][1433](system_configuration-1164d3f15fd9a555.system_configuration.ffd70cda82b4a369-cgu.0.rcgu.o)
ld: symbol(s) not found for architecture x86_64

EDIT: Enabled LTO in dev profile too, otherwise mullvad/system-configuration-rs#41 is triggered.

[r10s]

thanks a lot.

this PR seems to be necessary but not sufficient to build current core main branch.

at #2144 we got one error further :)

@link2xt: if we stay with rust 1.77, i suggest to merge #2123 as well, this is also necessary but not sufficient :)

[link2xt]

I have added CARGO_PROFILE_DEV_LTO=true and for me it works now, see "EDIT" in the post above.

For me main core builds now also with Rust 1.73.0 (until the breaking change that requires 1.77)

[r10s]

I have added CARGO_PROFILE_DEV_LTO=true and for me it works now, see "EDIT" in the post above.

ah, i will try over

For me main core builds now also with Rust 1.73.0 (until the breaking change that requires 1.77)

what do you mean by that? did you try some special commit?

the original error of #2144 was fixed for me as well

[link2xt]

what do you mean by that? did you try some special commit?

I tried commit 5bda4f0c2640f94cebd44b526cc1be40f94728f2, this is currently main^. Commit deltachat/deltachat-core-rust@2f0f247 (current main) is a merge of PR deltachat/deltachat-core-rust#5369 that requires Rust 1.77.

[r10s]

yip, with core at 5bda4f0c2640f94cebd44b526cc1be40f94728f2 , build succeeds without warnings or errors! (testing on rust 1.77 already, on both, real-device and simulator, all fine)

[r10s]

@link2xt shall we do a core release at 5bda4f0c2640f94cebd44b526cc1be40f94728f2 ? might be handy for proceeding

[link2xt]

@link2xt shall we do a core release at 5bda4f0c2640f94cebd44b526cc1be40f94728f2 ? might be handy for proceeding

Why not from the latest commit then, now that we have Rust 1.77?

[r10s]

Why not from the latest commit then, now that we have Rust 1.77?

that one did not build for me ... but let me double check, with all these changes PR and submodule checkouts one easily get confused. i'll file a new issue if things fail

[r10s]

i double checked, seems i messed sth up myself on last try, now current core main branch builds - in ci, in simulator and on real device, #2146