Re: using ld-linux.so to load private libraries

circusfire wrote: 
Hello All,

I am not an expert on linux , but have been using it in my profession
for quite some time
and understand things reasonably well. Here I have a problem:

I am writing an application "App" for a platform "Platfrom". "Platfrom"

has a simulator and uses certain "libraries" . However even my app
uses the same libraries. In order to run the "App" from the simulator,
I need to depoly the "App" in specifc directory and write an
application
descriptor for it.

The "libraries" used by "Platform" are in directory
/opt/host/Platfrom/lib
The "libraries" used by my application are in /usr/local/Platfrom/lib

When I launch the simulator and try to run the "App" on it, the App
runs -
but it uses the "libraries" of the "Platform" and not mine. What
happens
is that when I run the "App" on the simulator, loader already finds the

appropriate libs [ in this case Platform's libs ] are already loaded
and
links my app with them.

What I need is , the ability to create a "sand box" environment in
which
my "App" loads my "shared libraries" and execute.
Linking "App" statically is not an option I am looking for.

Now, looking at whatever meager documentation I could lay my
 hands on ld-linux.so, it appears that I can ask the dynamic loader to
load
specifc libraries I would want along with the app.

Any pointers are appreciated. 
It isn't clear by your description what you need.
Perhaps all you need is to set the LD_LIBRARY_PATH
environment variable to point to a certain location, so shared
libs will be loaded from that location instead of the default ?
See also the LD_PRELOAD environment variable.
man ld.so provides more information.
.

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