RE: [patch] --filter option in ld: srcfix

[PODOPLELOV Andrei <Andrei.PODOPLELOV@3ds.com>]

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Hi Florian,

Yes, I can build the executable with the suggested option. However, when I run it, I get SEGFAULT. That's exactly what should happen according to the docs.

See attached sample. I had to rename build.sh and remove #!/bin/bash from the top due to the corporate email restrictions.

My proposal does not change the meaning, but makes it more clear.

Thanks,
Andrei

-----Original Message-----
From: Florian Weimer <fweimer@redhat.com>
Sent: Thursday, December 9, 2021 8:36 AM
To: PODOPLELOV Andrei <Andrei.PODOPLELOV@3ds.com>
Cc: mtk.manpages@gmail.com; linux-man@vger.kernel.org; alx.manpages@gmail.com
Subject: Re: [patch] --filter option in ld: srcfix

* PODOPLELOV Andrei:

> Hi Florian,
>
> Responding to your idea about filtering...

> I just checked the filtering. It does work as expected, means, I
> cannot build main.c using some new symbol, defined only in filtee.c,
> but not in filter.c. So the runtime won't use the full set of filtee's
> symbols, but just a subset, defined in the filter.

Looks like ld (the link editor) has filtering,

Try linking with -Wl,-z,undefs, I expect you will see that the symbol is available at run time.

Thanks,
Florian

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