[xsd-users] dlclose and xsd cxx-tree

[Boris Kolpackov]

Hi John,

Skunk Worx <skunkworx at verizon.net> writes:

> I seem to be having a problem with xsd cxx-tree and dlclose(). 
>
> [...]
>
> ...why, after a successful dlclose(), is the .so still referenced in the  
> application memory?

I did some searches and there appears to be a bug either in GCC or glibc
(there doesn't seem to be a consensus on this). See these two threads
for more information:

http://gcc.gnu.org/ml/gcc-help/2011-05/msg00403.html
http://www.cygwin.com/ml/binutils/2011-05/msg00376.html


> It is my understanding that this will result in an invalid .so  
> initialization if the .so is subsequently reopened by the same  
> application instance.

I did some testing and what happens is dlclose() is simply ignored.
As a result, a subsequent dlopen() is also ignored. So it is ok
to re-load the library with this bug.

Boris