[Bug ld/30374] ld: Add --remap-inputs-file= to remap input files

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=30374

--- Comment #5 from Fangrui Song <i at maskray dot me> ---
(In reply to Nick Clifton from comment #4)
> OK, I have decided to commit my patch now, so that it gets into the next
> release. If there are problems we can always reopen this PR.

Thank you! I have tested the feature. It looks great.

>  ld foo.o --remap-inputs=foo.o=bar.o
>
> will not rename foo.o to bar.o, [...]

I hope that this will be fine. Users can get adapted to this limitation.

> One other thing: I wondered if we ought to accept the "@file" syntax in the 
> --remap-inputs option, as a synonym for --remap-inputs-file.  What do you 
> think ?

I think no. --remap-inputs @1.map would require extra work and the syntax is
probably not conventional.

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