On Sun, 6 Dec 2009, Dmitry Pryanishnikov wrote:
2009/12/3 Peter Beckman <beck...@angryox.com>:
On Thu, 3 Dec 2009, Dmitry Pryanishnikov wrote:
Well, ldd's output _itself_ depends on the current environment and
thus can't insure that correct libraries will be used by the
application. Compare:
Well that's just confusing! So what's the default? If I have no
LD_LIBRARY_PATH set, lighttpd uses /usr/local/lib as I would
expect/hope/desire, but I have no understanding as to why. If I set
LD_LIBRARY_PATH to /usr/lib, it uses everything right EXCEPT
/usr/lib/libssl.so.6. What's the logic? How does one do it right?
I haven't found definitive answer using RTFM. But luckily it's
opensource, so RTFS gives the following search order for rtld-elf (as
of RELENG_7):
/usr/src/libexec/rtld-elf/rtld.c:
/*
* Find the library with the given name, and return its full pathname.
* The returned string is dynamically allocated. Generates an error
* message and returns NULL if the library cannot be found.
*
* If the second argument is non-NULL, then it refers to an already-
* loaded shared object, whose library search path will be searched.
*
* The search order is:
* LD_LIBRARY_PATH
* rpath in the referencing file
* ldconfig hints
* /lib:/usr/lib
*/
Looks like 'libssl.so.6 => /usr/local/lib/libssl.so.6' is set via
rpath - it overrides standard hints path
'/lib:/usr/lib:/usr/lib/compat:/usr/local/lib...' but still can be
overridden by LD_LIBRARY_PATH.
You. Are. The. Man. I really appreciate you taking the time to dig that
up. I hope it will help someone else in the future also getting confused
with why one library is being used over another. Thanks!!!
Beckman
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Peter Beckman Internet Guy
beck...@angryox.com http://www.angryox.com/
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