alpha-openvms
  | 
  rts-native (default)
  | 
|     Tasking     | native VMS threads
  | 
|     Exceptions  | ZCX
 
  | 
alpha-tru64
  | 
  rts-native (default)
  | 
|     Tasking     | native TRU64 threads
  | 
|     Exceptions  | ZCX
 
  | 
  rts-sjlj
  | 
|     Tasking     | native TRU64 threads
  | 
|     Exceptions  | SJLJ
 
  | 
ia64-hp_linux
  | 
  rts-native (default)
  | 
|     Tasking     | pthread library
  | 
|     Exceptions  | ZCX
 
  | 
ia64-hpux
  | 
  rts-native (default)
  | 
|     Tasking     | native HP-UX threads
  | 
|     Exceptions  | SJLJ
 
  | 
ia64-openvms
  | 
  rts-native (default)
  | 
|     Tasking     | native VMS threads
  | 
|     Exceptions  | ZCX
 
  | 
ia64-sgi_linux
  | 
  rts-native (default)
  | 
|     Tasking     | pthread library
  | 
|     Exceptions  | ZCX
 
  | 
mips-irix
  | 
  rts-native (default)
  | 
|     Tasking     | native IRIX threads
  | 
|     Exceptions  | ZCX
 
  | 
pa-hpux
  | 
  rts-native (default)
  | 
|     Tasking     | native HP-UX threads
  | 
|     Exceptions  | ZCX
 
  | 
  rts-sjlj
  | 
|     Tasking     | native HP-UX threads
  | 
|     Exceptions  | SJLJ
 
  | 
ppc-aix
  | 
  rts-native (default)
  | 
|     Tasking     | native AIX threads
  | 
|     Exceptions  | SJLJ
 
  | 
ppc-darwin
  | 
  rts-native (default)
  | 
|     Tasking     | native MacOS threads
  | 
|     Exceptions  | ZCX
 
  | 
| sparc-solaris   | 
  | 
  rts-native (default)
  | 
|     Tasking     | native Solaris threads library
  | 
|     Exceptions  | ZCX
 
  | 
  rts-pthread
  | 
|     Tasking     | pthread library
  | 
|     Exceptions  | ZCX
 
  | 
  rts-sjlj
  | 
|     Tasking     | native Solaris threads library
  | 
|     Exceptions  | SJLJ
 
  | 
| sparc64-solaris   | 
  | 
  rts-native (default)
  | 
|     Tasking     | native Solaris threads library
  | 
|     Exceptions  | ZCX
 
  | 
x86-linux
  | 
  rts-native (default)
  | 
|     Tasking     | pthread library
  | 
|     Exceptions  | ZCX
 
  | 
  rts-sjlj
  | 
|     Tasking     | pthread library
  | 
|     Exceptions  | SJLJ
 
  | 
x86-lynx
  | 
  rts-native (default)
  | 
|     Tasking     | native LynxOS threads
  | 
|     Exceptions  | SJLJ
 
  | 
x86-solaris
  | 
  rts-native (default)
  | 
|     Tasking     | native Solaris threads
  | 
|     Exceptions  | SJLJ
 
  | 
x86-windows
  | 
  rts-native (default)
  | 
|     Tasking     | native Win32 threads
  | 
|     Exceptions  | ZCX
 
  | 
  rts-sjlj (default)
  | 
|     Tasking     | native Win32 threads
  | 
|     Exceptions  | SJLJ
 
  | 
x86-windows-rtx
  | 
  rts-rtx-rtss (default)
  | 
|     Tasking     | RTX real-time subsystem RTSS threads (kernel mode)
  | 
|     Exceptions  | SJLJ
 
  | 
  rts-rtx-w32
  | 
|     Tasking     | RTX Win32 threads (user mode)
  | 
|     Exceptions  | ZCX
 
  | 
x86_64-linux
  | 
  rts-native (default)
  | 
|     Tasking     | pthread library
  | 
|     Exceptions  | ZCX
 
  | 
  rts-sjlj
  | 
|     Tasking     | pthread library
  | 
|     Exceptions  | SJLJ
 
  |