I don't know why my posts aren't coming through - here's my third try at sending my original message, with the three source files (again). I'm trying to use the Boost threads library in an application on AIX 5.3, but I'm having serious trouble. I've narrowed it down to the test code below. When both "main.cpp" and "Class1.cpp" include <boost/thread/thread.hpp>, the compiled application coredumps whenever an exception is thrown in Class1. When the thread.hpp include statement is commented out - in either file - the exception is thrown and caught fine, with no coredump. Note that neither main.cpp nor Class1.cpp *uses* any Boost threads code. This problem occurs with both gcc 3.3.2 (as provided by IBM in their "AIX Toolbox") and gcc 3.4.6 (as built from source). In both cases, the AIX linker "ld" is used, per both IBM and GNU's recommendations. This seems to only happen on AIX 5.3. The same code on Linux, Solaris and AIX 5.1, compiled the same way, does not crash in this way. This also occurs with both Boost 1.33.0 and 1.33.1. I'm currently compiling against the latest Boost source (1.33.1), though it's not built, since I'm only including headers, and not linking anything. ---- main.cpp ---- #include <iostream> #include "Class1.h" #include <boost/thread/thread.hpp> main () { std::cout << "starting main()" << std::endl; Class1 c; c.noop(); std::cout << "exiting main() normally" << std::endl; } ---- Class1.h ---- class Class1 { public: void noop(); }; ---- Class1.cpp ---- #include <iostream> #include "Class1.h" #include <boost/thread/thread.hpp> void Class1::noop () { std::cout << "entering Class1::noop()" << std::endl; try { std::cout << "..throwing exception" << std::endl; throw (2.1); } catch (...) { std::cout << "..caught exception in Class1.noop()" << std::endl; } std::cout << "..leaving Class1.noop()" << std::endl; return; } The previous files are built and run with these commands:

g++ -o crasher -I$HOME/boost/boost_1_33_1 main.cpp Class1.cpp ./crasher

I do get these linker errors: ld: 0711-224 WARNING: Duplicate symbol: ._GLOBAL__I_thread_creds_t ld: 0711-224 WARNING: Duplicate symbol: ._GLOBAL__D_thread_creds_t ld: 0711-224 WARNING: Duplicate symbol: _GLOBAL__F_thread_creds_t ld: 0711-224 WARNING: Duplicate symbol: thread_creds_t ld: 0711-224 WARNING: Duplicate symbol: _GLOBAL__I_thread_creds_t ld: 0711-224 WARNING: Duplicate symbol: _GLOBAL__D_thread_creds_t ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information. Any help will be greatly appreciated. Thanks, Chris Grayson Database-Brothers, Inc.