# error "Multi-threaded programs are not supported by gcc on HPUX or Irix (last checked with gcc 3.3)"
#endif
#endif
# error "Threading support unavaliable: it has been explicitly disabled with BOOST_DISABLE_THREADS"
#elif !defined(BOOST_HAS_THREADS)
# if defined __COMO__
// Comeau C++
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -D_MT (Windows) or -D_REENTRANT (Unix)"
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: either /MT /MTd /MD or /MDd"
#else
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -openmp"
#endif
# elif defined __GNUC__
// GNU C++:
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -pthread (Linux), -pthreads (Solaris) or -mthreads (Mingw32)"
#elif defined __sgi
// SGI MIPSpro C++
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -D_SGI_MP_SOURCE"
#elif defined __DECCXX
// Compaq Tru64 Unix cxx
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -pthread"
#elif defined __BORLANDC__
// Borland
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -tWM"
#elif defined __MWERKS__
// Metrowerks CodeWarrior
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: either -runtime sm, -runtime smd, -runtime dm, or -runtime dmd"
#elif defined __SUNPRO_CC
// Sun Workshop Compiler C++
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -mt"
#elif defined __HP_aCC
// HP aCC
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: -mt"
#elif defined(__IBMCPP__)
// IBM Visual Age
# error "Compiler threading support is not turned on. Please compile the code with the xlC_r compiler"
#elif defined _MSC_VER
// Microsoft Visual C++
//
// Must remain the last #elif since some other vendors (Metrowerks, for
// example) also #define _MSC_VER
# error "Compiler threading support is not turned on. Please set the correct command line options for threading: either /MT /MTd /MD or /MDd"
#else
# error "Compiler threading support is not turned on. Please consult your compiler's documentation for the appropriate options to use"