Is libstdc++ in stock egcs 1.1.2 thread-safe?

[Shmulik Rippa]

We have some problems when running a multithreaded program on a double
CPU computer under Linux. The problem seems to be always close to places
of dynamic memory allocation (new). We are compiling with the following
thread related compiler options:

-D_REENTRANT -D_POSIX_THREADS -D_POSIX_THREAD_SAFE_FUNCTIONS

Under the above setting, is the implementation of new and delete
thread-safe or do I have to take care of synchronization issues (mutex
and the like) by myself?

Opinions expressed in various documentation regarding the thread-safety
of libstdc++ vary widely. To what extent libstdc++ implementation is
thread-safe? Or is it not thread-safe at all? (Please note that I am not
talking about STL).

Additional info:
glibc: 2.0.7
Linux kernel: 2.2.x
egcs: stock 1.1.2
libstdc++: from stock egcs 1.1.2.

Any help is greatly appreciated.
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