cc1: error: bad value ('merom') for '-march=' switch

Our -march filtering is probably messing it up - the CMake script is supposed to check if -march=merom is available and falls back to core2 if not. We're also building an old version here so I'm guessing this issue has impacted updating the formula.

3.11.x totally redos the architecture stuff so if we update to that will require some care.

Yeah, I was unable to get us bumped to 3.11.1 a few days ago: #134010

Could try core instead though we will lose some optimization (SSSE3).

Part of reason we haven't been able to update ArangoDB is that they only support specific Clang/GCC versions, which is why we aren't able to use default compilers.

Looks like new LLVM/Clang (16 ?) behavior is causing build failure for update to 3.11.x.

Superseded by #135487.