[Bug dynamic-link/20172] ld.so: add possibility to suppress LD_PRELOAD warnings

[Bug dynamic-link/20172] ld.so: add possibility to suppress LD_PRELOAD warnings

[Simon.Richter at hogyros dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=20172

Simon Richter <Simon.Richter at hogyros dot de> changed:

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                 CC|                            |Simon.Richter at hogyros dot de

--- Comment #1 from Simon Richter <Simon.Richter at hogyros dot de> ---
The most annoying instance of this warning is in mixed 32/64 bit environments.

In my use case, I have to preload a library into both 32 and 64 bit processes,
so I have two builds of the library and list both of them in ld.so.preload.
Every process startup now produces an error message, and suppressing these
would require me to list all libraries under "ignore errors from this".

Would it make sense to add a mechanism for conditional preloading, depending on
architecture, or a placeholder in the name that is replaced with the current
architecture so multiple libraries can be provided?

As for your patch, it adds a semantic change by making a break statement
conditional when it wasn't before. Is that a related problem?

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[Bug dynamic-link/20172] ld.so: add possibility to suppress LD_PRELOAD warnings

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20172

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |fweimer at redhat dot com

--- Comment #2 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to Simon Richter from comment #1)
> The most annoying instance of this warning is in mixed 32/64 bit
> environments.
> 
> In my use case, I have to preload a library into both 32 and 64 bit
> processes, so I have two builds of the library and list both of them in
> ld.so.preload.

I think you already can use $LIB in the path to load the correct library based
on word size. See the ld.so(8) manual page:
https://www.man7.org/linux/man-pages/man8/ld.so.8.html

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