Ticket #296 (defect)

Not really a bug, but definitely a portability issue:

Exception handling in multi-threaded code (e.g., thread-per-block scheduling) on MinGW requires that the -mthreads option to g++ be specified when compiling and linking C++ code. This sets internal defines during compilation and selects needed libraries when linking. When libtool is used, -mthreads must be specified as part of CXX during libtool configuration in order to generate the required library dependencies.

At present, we must set CXX="g++ -mthreads" before running ./configure on MinGW. It would be nice if this could be done automatically as a part of the configuration process, but if there is no neat way to do this we can still users to set it manually. Note that the -mthreads option is (by definition) specific to MinGW and has no effect on any other platform.

Feel free to change this to an enhancement request if appropriate.