Support for position independent code (PIC) (LLVM-419)

[benhansen-io]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate.
• Described the feature in detail and justified the reason for the request.
• Provided specific use cases and examples.

Feature description

I would like to use espressif/elf_loader to load an elf file with Rust code on the esp32s3 (xtensa) however elf loader currently requires position independent code. When I try to compile Rust code with the esp-rs compiler using the rust flag: -C relocation-model=pic

I get the following error message:

LLVM ERROR: PIC relocations is not supported
error: could not compile `core` (lib)

Use cases

For use cases such as elf_loader where code is to be loaded at runtime. In my case I have sections of code that I would like to load and execute from SD card so people can develop small "apps" for my device without requiring reflashing the firmware.

Alternatives

No response

Additional context

No response