Reserving specified size of RUNPATH entry in the dynamic section during linking

[Tom Kacvinsky]

On Sat, Nov 27, 2021 at 5:05 PM Jacob Kroon via Gcc-help <
gcc-help@gcc.gnu.org> wrote:

> Hi,
>
> As part of an effort to make binaries reproducible regardless of their
> build path, I need to enforce the same size of the RUNPATH entry in the
> dynamic section during linking, even though I don't fill it completely.
> Is it possible to give some flag to gnu ld that allows me to set it to a
> specific size ? Or is there a way to patch the elf file after linking,
> so that the entry has a specified size ?
>

This tool doesn't quite do what you'd like (set a fixed size for the
RUNPATH entry in the dynamic table), but I have found it quite
useful:

https://github.com/NixOS/patchelf

Tom