[MacPorts] #58848: Error: Failed to build rust: command execution failed

[Ryan Schmidt]

On Aug 19, 2019, at 05:22, Chris Jones wrote:

>> It could be that switching to the latest compiler would help. You can
>> try building with
>>     sudo port -v build rust configure.compiler=macports-clang-7.0
>> or something like that (I'm not 100% sure if the command is exactly
>> right as I'm not behind my mac right now).
> 
> Tried that, doesn't help.
> 
>  = note: dyld: Symbol not found: __ZTIN4llvm10CallbackVHE
>            Referenced from: /opt/local/libexec/llvm-7.0/bin/clang
>            Expected in: /opt/local/var/macports/build/_Users_chris_Projects_MacPorts_ports_lang_rust/rust/work/rustc-1.36.0-src/build/stage0-x86_64/lib/libLLVM.dylib
>           in /opt/local/libexec/llvm-7.0/bin/clang
> 
> which looks nasty. It appears rust is borking its build environment in a way that causes /opt/local/libexec/llvm-7.0/bin/clang to pick up an inconsistent internal build of libLLVM.dylib. nice....

Setting DYLD_LIBRARY_PATH would be the usual way that such a bork would occur.

Can the rust port use our existing llvm, rather than build its own? That would solve this problem and also hopefully considerably reduce rust's very long build time.