RTLD_DEEPBIND fixes this problem using a test program and two minimalistic
DSOs to emulate the namespace clash problem. But I see PHP has support
for RTLD_DEEPBIND:

if defined(RTLD_GROUP) && defined(RTLD_WORLD) && defined(RTLD_PARENT)

...

elif defined(RTLD_DEEPBIND)

...

else

...

endif

On my Linux glibc 2.3 systems RTLD_DEEPBIND is chosen.

So now, I have to wonder why my customer had a problem in the first place.

Based on the above macros, is it possible that RTLD_DEEPBIND could NOT
be chosen?

Mike

On Fri, 15 Sep 2006 11:43:56 -0400
Michael B Allen mba2000@ioplex.com wrote:

My extension (plexsso.so) is dymanically linked with a library. That
library (libplexsso.so) is a statically linked collection of libs
including a custom version of Heimdal Kerberos (libkrb5.a). I have found
that if another module is linked with the stock Heimdal (e.g. pgsql.so
dynamically in this case) some symbol mixing occurs and the application
crashes.

Can two modules use different instances of the same library?

Before I go try to become an expert in linking and the Linux loader
can anyone give me advice as to how to I might workaround (for Linux
at least)?

Mike

--
Michael B Allen
PHP Active Directory SSO
http://www.ioplex.com/