[PATCH] csu: Skip ARCH_SETUP_IREL if _dl_relocate_static_pie applied IRELATIVE relocations [BZ #27164]

[Siddhesh Poyarekar]

On 7/13/21 1:36 PM, Fangrui Song via Libc-alpha wrote:
> A toolchain project can do some workaround for a libc if this choice
> makes a large community happy. However, I think it is important not to
> take it granted. It is inadequate to just dismiss toolchain developers'
> reasonable complaints. The libc should actively fix the issues so that
> the toolchain will not need to bear unneeded code in the future.
> 
> I actually have contributed quite a few lld/ELF patches to work around
> glibc. For this one I just feel it is not right to just patch lld/ELF
> without fixing glibc.

What's the utility of having the __rela_iplt{_start,_end} symbols in all 
binaries other than, maybe, simplifying the static linker 
implementation?  How does it improve things for the generated 
application code in the end?  AFAICT it is doing the opposite by 
requiring application startup to add a conditional to work around the 
presence of a redundant symbol.

Siddhesh