[boost] Threads in xcode

From: Benjohn (benjohn_at_[hidden])
Date: 2005-02-01 16:00:46

We're building a multithreaded OS X application with xcode, that uses 
cocoa, objective c++, and makes a lot of use of shared_ptr and other 
parts of Boost. We're currently using boost 1_32_0 (I've just upgraded 
from boost-1.30.2).

We're getting some crashes, and I've started to suspect that 
<boost/shared_ptr.hpp> isn't being compiled with multithread awareness. 
Acting on this hunch, if <boost/requires_threads.hpp> is included, it 
generates the compilation error:

        "Compiler threading support is not turned on. Please set the correct 
command line options for threading: -pthread (Linux), -pthreads 
(Solaris) or -mthreads (Mingw32)"

...which seems to suggest that shared_ptrs (if they use the same config 
info) wouldn't be compiling in thread support.

Are application also makes use of the pthread API, and cocoa's threads 
class, and these both seem to be working as expected.

We've had a look at xcode's options, but have found no way to 
explicitly turn on thread support. Specifically, adding -pthread or 
-pthreads causes the compiler to issue an error. We have also looked 
for a configure script in the boost distribution, but can find nothing 
(except for the one in libs/config/ which doesn't seem to work, but I 
personally think we're using it wrong).

If someone could suggest what we may be missing, I'd be terribly 
grateful.

Thanks very much, and thanks for a great library!
        Cheers,
                Benjohn