Cannot use asan or ubsan

[Christopher Jones]

Hi,

Macports clang work fine for me, what OS are you on ? If you are on an old OS it’s more likely the santizers don’t work or are just disabled there.

I see the same with GCC, I guess they just aren’t working there currently.

Chris

> On 1 Jun 2026, at 5:59 pm, Ryan Carsten Schmidt <ryandesign at macports.org> wrote:
> 
> I'm trying to compile a program using the address sanitizer and/or the undefined behavior sanitizer. I've tried clang 18 and gcc 15 and neither seem to be able to link:
> 
> $ clang-mp-18 -fsanitize=address test.c -o test
> ld: file not found: /opt/local/libexec/llvm-18/lib/clang/18/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
> 
> $ clang-mp-18 -fsanitize=undefined test.c -o test
> ld: file not found: /opt/local/libexec/llvm-18/lib/clang/18/lib/darwin/libclang_rt.ubsan_osx_dynamic.dylib
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
> 
> $ gcc-mp-15 -fsanitize=address test.c -o test
> ld: library not found for -lasan
> collect2: error: ld returned 1 exit status
> 
> $ gcc-mp-15 -fsanitize=undefined test.c -o test
> ld: library not found for -lubsan
> collect2: error: ld returned 1 exit status
> 
> Is this supposed to work? Am I supposed to be doing something else to get this to work?
> 
>