I checked my MinGW installation's configuration (via g++ -v) and it gave me the following: Using built-in specs. Target: mingw32 Configured with: ../gcc-4.4.0/configure --enable-languages=c,ada,c++,fortran,java,objc,obj-c++ --disable-sjlj-exceptions --enable-shared --enable-libgcj --enable-libgomp --with-dwarf2 --disable-win32-registry --enable-libstdcxx-debug --enable-version-specific-runtime-libs --prefix=/mingw --with-gmp=/mingw/src/gmp/root --with-mpfr=/mingw/src/mpfr/root --build=mingw32 Thread model: win32 gcc version 4.4.0 (GCC) It seems that my build of the MinGW compiler does not support setjmp/longjmp exceptions. If that is the case, how does MinGW build the static Boost libraries to require setjmp and longjmp, if it doesn't even support it? Or is there a compiler flag I can pass to g++ when I call it that will allow setjmp and longjmp use? Benjamin