Company or project name

CH

Describe the problem

We now have the option to build compiler-rt as necessary. Currently it's behind a flag USE_SYSTEM_COMPILER_RT=0 or built when we cannot find the libraries themselves.

For headers, such as xray/xray_interface.h or <sanitizer/msan_interface.h> we are still relying on the ones provided by the compiler in the system.

This causes issues: #89173 (comment) / #91452

Instead we could move away completely from compiler provided builtins and always build and use our own, both for libraries and headers.

As part of this we could try to integrate the build of those libraries into our own cmake directly, instead of using an external cmake call to build them, if it's not too hard / complex to make and maintain.

Operating system

Linux / FreeBSD

CMake version

No response

Ninja version

No response

Compiler name and version

No response

Full cmake and/or ninja output with the error

.