hundreds of warnings when linking core `main` branch

[r10s]

comping/linking core 1.136.1 results in lots of warnings as

ld: warning: object file (/Users/bpetersen/projects/deltachat-ios/deltachat-ios/libraries/libdeltachat.a[arm64][21](ba1daabeec5f0744-armv8-mont-ios64.o)) was built for newer 'iOS' version (17.2) than being linked (12.0)

full log: https://gist.github.com/r10s/5beceb77824ce72566883a0fadc198ce
rust-toolchain: 1.73.0 (unchanged)
build-environment: macOS Sonoma 14.3.1

just ftr for now, i did not try to make sense of it.

apart from the updated submodule nothing has changed. i also double checked to build core 1.135 in the same environment - no error or warning

maybe some xcode option need to be tweaked, but interesting that it does not happen for 1.135

maybe somehow releated: deltachat/deltachat-android#2972

[r10s]

this issue is fixed somehow by 1.136.2, together with deltachat/deltachat-android#2972 :)

[r10s]

the warnings are back again on ~current core master - while using chatmail/core#5387 was fine - sth. has changed in between, i cannot make sense of that @link2xt these are warnings only - but do you have any clue what could cause that? so it is easier to get rid of them :)

EDIT: i just updated macos to "Sonoma 14.4.1" and Xcode to 15.3 - still the same warnings.

will try if rust 1.77 changes anything. EDIT: no change

in my understanding,, by some core changes, things are suddenly build for 17.2 instead of 12.0 - and that could also be reverted - the issue was there for 1.136.1 and disappeared with 1.136.2

and https://stackoverflow.com/questions/50703177/cannot-compile-rust-code-on-macos-10-12-object-file-was-built-for-newer-osx-ver (via search "rust lipo Object file was built for newer version than being linked") points to some possible environment vars - EDIT: tried adding "export IPHONEOS_DEPLOYMENT_TARGET=8.0" atop of "Build Phases / Run Script" - no change

💫 maybe i wait just for another core update that let the warnings magically disappear as from 1.136.1 to 1.136.2 🪄🎩

[link2xt]

Between 1.136.1 and 1.136.2 we downgraded cc crate to 1.0.83.
Now because of backtrace crate update we had to upgrade cc again, have to downgrade cc and backtrace then to get back to cc = 1.0.83.

[link2xt]

Breaking change is probably this one: rust-lang/cc-rs#848
But it should still support IPHONEOS_DEPLOYMENT_TARGET.
This should really be fixed by setting IPHONEOS_DEPLOYMENT_TARGET. Don't know why it does not work with export, maybe environment variables are not passed through and should be configured in project.pbxproj as suggested in cargo-lipo readme.

[r10s]

thanks a lot for the info, this js very helpful!

i will have a closer look at the environment vars then

[link2xt]

Just grepping over deltachat-ios repo shows many instances of IPHONEOS_DEPLOYMENT_TARGET = 12.0 in project.pbxproj file. Does it help if they are replaced?

[link2xt]

I did a PR #2139 with a quick sed