Rust on MacOS fails compilation

[Louis Guillaume <louis%zabrico.com@localhost>]

Hi,

It looks like rust isn't able to complete building on MacOS.

I've tried using "rust-bin" but since the ruby build depends on the Rust 
source it apparently will try to install the regular rust anyway.

Is there a workaround or some mk.conf magic that might make this build 
work? Or maybe there's a specific MACOSX_DEPLOYMENT_TARGET that needs to 
be set for pkgsrc?

Here are the details of my build system:

MacOs Sequoia 15.5 (INTEL).
XCode 16.4
pkgsrc-2025Q2 branch.

Here's the build error:


   Compiling llvm-bitcode-linker v0.0.1 
(/opt/pkgobj/lang/rust/work/rustc-1.86.0-src/src/tools/llvm-bitcode-linker)
    Finished `release` profile [optimized] target(s) in 13.66s
dyld[75816]: Library not loaded: 
@rpath/librustc_driver-d030a9896855c42b.dylib
  Referenced from: <9FD618FE-A2CD-36CD-AA20-E8AB1CE1F9F9> 
/opt/pkgobj/lang/rust/work/rustc-1.86.0-src/build/x86_64-apple-darwin/stage1/bin/rustc
  Reason: tried: '/opt/pkg/lib/librustc_driver-d030a9896855c42b.dylib' 
(no such file), 
'/System/Volumes/Preboot/Cryptexes/OS/opt/pkg/lib/librustc_driver-d030a9896855c42b.dylib' 
(no such file), '/opt/pkg/lib/librustc_driver-d030a9896855c42b.dylib' 
(no such file), 
'/System/Volumes/Preboot/Cryptexes/OS/opt/pkg/lib/librustc_driver-d030a9896855c42b.dylib' 
(no such file)
Command 
"/opt/pkgobj/lang/rust/work/rustc-1.86.0-src/build/x86_64-apple-darwin/stage1/bin/rustc" 
"--target" "x86_64-apple-darwin" "--print=deployment-target" 
(failure_mode=Exit) has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:10:10
*** Error code 1

Stop.
bmake[2]: stopped making "package-install" in /zabrico/pkgsrc/lang/rust
*** Error code 1



Any help on this would be great. Thanks!

--
Louis