HP-UX Reference (11i v2 03/08) - 3 Library Functions A-M (vol 6)

dlopen(3C) dlopen(3C)

RETURN VALUE

If ﬁle cannot be found, cannot be opened for reading, is not a shared object, or if an error occurs during

the process of loading ﬁle or relocating its symbolic references,

dlopen returns NULL. More detailed

diagnostic information is available through

dlerror.

WARNINGS

The environment variable

LD_LIBRARY_PATH

and SHLIB_PATH should contain a colon-separated list

of directories, in the same format as the

PATH variable (see sh(1)). LD_LIBRARY_PATH

and

SHLIB_PATH will be ignored if the process’ real user id is different from its effective user id or its real

group id is different from its effective group id (see exec(2)).

With the

+compat option speciﬁed, LD_LIBRARY_PATH

and +b embedded path will be ignored while

searching for dependent libraries.

Use caution when building shared libraries with external library dependencies. Any library that contains

Thread Local Storage (TLS) and uses static TLS model should not be used as a dependency. See "Thread

Local Storage" in dld.so(5) for more information. If a dependent library contains TLS, was built with

static TLS model and it is not loaded during program startup (that is, not linked against the executable),

the dynamic loader fails to perform the operation. You can use

+tls=dynamic compiler option to re-

compile the library to avoid errors.