Add support for the QNX operating system.

include/v8config.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 70 matching lines @@
 //  V8_OS_BSD           - BSDish (Mac OS X, Net/Free/Open/DragonFlyBSD)
 //  V8_OS_CYGWIN        - Cygwin
 //  V8_OS_DRAGONFLYBSD  - DragonFlyBSD
 //  V8_OS_FREEBSD       - FreeBSD
 //  V8_OS_LINUX         - Linux
 //  V8_OS_MACOSX        - Mac OS X
 //  V8_OS_NACL          - Native Client
 //  V8_OS_NETBSD        - NetBSD
 //  V8_OS_OPENBSD       - OpenBSD
 //  V8_OS_POSIX         - POSIX compatible (mostly everything except Windows)
+//  V8_OS_QNX           - QNX Neutrino
 //  V8_OS_SOLARIS       - Sun Solaris and OpenSolaris
 //  V8_OS_WIN           - Microsoft Windows
 
 #if defined(__ANDROID__)
 # define V8_OS_ANDROID 1
 # define V8_OS_LINUX 1
 # define V8_OS_POSIX 1
 #elif defined(__APPLE__)
 # define V8_OS_BSD 1
 # define V8_OS_MACOSX 1
@@ skipping 19 matching lines @@
 # define V8_OS_DRAGONFLYBSD 1
 # define V8_OS_POSIX 1
 #elif defined(__NetBSD__)
 # define V8_OS_BSD 1
 # define V8_OS_NETBSD 1
 # define V8_OS_POSIX 1
 #elif defined(__OpenBSD__)
 # define V8_OS_BSD 1
 # define V8_OS_OPENBSD 1
 # define V8_OS_POSIX 1
+#elif defined(__QNXNTO__)
+# define V8_OS_POSIX 1
+# define V8_OS_QNX 1
 #elif defined(_WIN32)
 # define V8_OS_WIN 1
 #endif
 
 
 // -----------------------------------------------------------------------------
 // C library detection
 //
 //  V8_LIBC_BIONIC  - Bionic libc
 //  V8_LIBC_BSD     - BSD libc derivate
@@ skipping 318 matching lines @@
 # define V8_ALIGNOF(type) __alignof__(type)
 #else
 // Note that alignment of a type within a struct can be less than the
 // alignment of the type stand-alone (because of ancient ABIs), so this
 // should only be used as a last resort.
 namespace v8 { template <typename T> class AlignOfHelper { char c; T t; }; }
 # define V8_ALIGNOF(type) (sizeof(::v8::AlignOfHelper<type>) - sizeof(type))
 #endif
 
 #endif  // V8CONFIG_H_