Is __default_alloc_template thread safe on Solaris?

[Loren James Rittle]

> I have extensively used libstdc++ on multithreaded apps on linux 
> platform, however STLs seem to have notorious behaviour on Solaris 
> platform. [...] g++ verion on Solaris is 2.95.3 while 

IMHO, it is *very* hard to configure and use threads in STL properly
with g++ 2.95.X (and anything before 3.0) on a random port.  Your
report confirms that fact.  Upgrade your Solaris box to (at least) g++
3.2, where the compiler reports "Thread model: posix".

Regards,
Loren