Unable to enable sanitizer on macOS

[dpo]

Hi. I'm building a mixed C-C++-Fortran project with Meson and trying to enable the address sanitizer. I use the flag Db_sanitize=address,undefined. I've also tried -Db_sanitize=address -Db_lundef=false. Invariably, the build results in

ld: library not found for -lasan

Indeed, I cannot find a libasan on my system. I use gcc/g++/gfortran version 13 installed with Homebrew. I tried the arm64 and intel versions. Both fail with the same error message.

I have tried using the clang/clang++/gfortran-13 combination with the clang that ships with macOS, but sadly, clang does not support OpenMP, which is needed in the project.

I guess I'm a bit confused as to how one is supposed to be using the address sanitizer with gcc on macOS exactly. Could someone provide any guidance here?

Thank you in advance.

[eli-schwartz]

This is usually supposed to be handled internally by the compiler with the -fsanitize= argument. Build systems like meson don't pass -lasan directly. So I have a sneaking suspicion that this means the compiler toolchain itself lacks sufficient support for asan.

[eli-schwartz]

Okay, looking around this seems to be https://github.com/orgs/Homebrew/discussions/3384

Maybe specifically unsupported by the arm64 edition of homebrew gcc? Does that make sense?

[dpo]

Thank you. I get the same error with the compilers for the Intel architecture, though.

[dpo]

And the same happens with the gcc-12 toolchain.