Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Wed, 06 Jul 2005 11:07:15 -0400

Well ... generally spoken ...
the binary should find a library that matches the header files it was
compiled against. It's not exactly important where that library is
located, but the search path mechanisms for finding dynamic libraries
(which heavily depend on the operating system) must be set up correctly
to avoid the binary finding a wrong version.
There's a place within the EPICS configuration directories where you can
set up the default search path that is compiled into the binaries. (The
App Developer's should mention that somewhere.) Most operating systems
allow for adding and/or overriding these paths through environment
variables. Again, the exact way to do that depends on your OS.
The behavior of a library doesn't change with its location. Your binary
probably finds a different library of the same name whose location is
mentioned earlier in the search path list.
Hope this helps,
Ralph

Christophe Moins wrote:
Hi,
Would someone know if there is any requirement concerning the use of
dynamic libraries in an epics application ?

Should they be located in the lib/target directory of the epics base
directory or can we use also libraries located in the /usr/local/lib ?

I ask this as I have not had the same behaviour of a library
according to the directory where it was stored.

Thanks
Christophe

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System