Re: Setting "RPATH" and/or "RUNPATH" of existing binary?

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Mike A. Harris wrote:

On Thu, 15 Jan 2004, Toralf Lund wrote:



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List-Id: General Red Hat Linux discussion list <redhat-list.redhat.com>
Subject: Setting "RPATH" and/or "RUNPATH" of existing binary?

I'm not sure if this is the best forum for this kind of question, but...

Does anyone know if there is a way to set the DT_RPATH or DT_RUNPATH on an existing ELF binary? I.e. to produce the same effect as linker option "-rpath", but via a call made *after* the link is done?

I want this because it would be more practical than -rpath at compile time for a software package I'm building. Simply put, I have some apps that link with special DSOs that will be installed outside of /usr/lib, or possibly on a *subdirectory* of /usr/lib (I haven't reached a final decision on the exact layout yet.) The problem is that the build system (i.e. make) doesn't really know where this location is - but the packager does. (Yeah, I could tell make about it, but it would rise some build order issues etc.; I won't go into more detail here.)



Why not use LD_PRELOAD?


Wouldn't that mean duplicating the link info, requiring lots of wrappers etc.?

Doesn't seem to practical...

- Toralf



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