JavaScriptCore/wtf/Platform.h - WebKit - Git at Google

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. 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 with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #ifndef WTF_Platform_h
 #define WTF_Platform_h

 /* PLATFORM handles OS, operating environment, graphics API, and CPU */
 #define PLATFORM(WTF_FEATURE) (defined( WTF_PLATFORM_##WTF_FEATURE ) && WTF_PLATFORM_##WTF_FEATURE)
 #define COMPILER(WTF_FEATURE) (defined( WTF_COMPILER_##WTF_FEATURE ) && WTF_COMPILER_##WTF_FEATURE)
 #define HAVE(WTF_FEATURE) (defined( HAVE_##WTF_FEATURE ) && HAVE_##WTF_FEATURE)
 #define USE(WTF_FEATURE) (defined( WTF_USE_##WTF_FEATURE ) && WTF_USE_##WTF_FEATURE)
 #define ENABLE(WTF_FEATURE) (defined( ENABLE_##WTF_FEATURE ) && ENABLE_##WTF_FEATURE)

 /* Operating systems - low-level dependencies */

 /* PLATFORM(DARWIN) */
 /* Operating system level dependencies for Mac OS X / Darwin that should */
 /* be used regardless of operating environment */
 #ifdef __APPLE__
 #define WTF_PLATFORM_DARWIN 1
 #include <AvailabilityMacros.h>
 #if !defined(MAC_OS_X_VERSION_10_5) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5
 #define BUILDING_ON_TIGER 1
 #elif !defined(MAC_OS_X_VERSION_10_6) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
 #define BUILDING_ON_LEOPARD 1
 #endif
 #endif

 /* PLATFORM(WIN_OS) */
 /* Operating system level dependencies for Windows that should be used */
 /* regardless of operating environment */
 #if defined(WIN32) || defined(_WIN32)
 #define WTF_PLATFORM_WIN_OS 1
 #endif

 /* PLATFORM(WIN_CE) */
 /* Operating system level dependencies for Windows CE that should be used */
 /* regardless of operating environment */
 /* Note that for this platform PLATFORM(WIN_OS) is also defined. */
 #if defined(_WIN32_WCE)
 #define WTF_PLATFORM_WIN_CE 1
 #endif

 /* PLATFORM(LINUX) */
 /* Operating system level dependencies for Linux-like systems that */
 /* should be used regardless of operating environment */
 #ifdef __linux__
 #define WTF_PLATFORM_LINUX 1
 #endif

 /* PLATFORM(FREEBSD) */
 /* Operating system level dependencies for FreeBSD-like systems that */
 /* should be used regardless of operating environment */
 #ifdef __FreeBSD__
 #define WTF_PLATFORM_FREEBSD 1
 #endif

 /* PLATFORM(OPENBSD) */
 /* Operating system level dependencies for OpenBSD systems that */
 /* should be used regardless of operating environment */
 #ifdef __OpenBSD__
 #define WTF_PLATFORM_OPENBSD 1
 #endif

 /* PLATFORM(SOLARIS) */
 /* Operating system level dependencies for Solaris that should be used */
 /* regardless of operating environment */
 #if defined(sun) || defined(__sun)
 #define WTF_PLATFORM_SOLARIS 1
 #endif

 #if defined (__S60__) || defined (__SYMBIAN32__)
 /* we are cross-compiling, it is not really windows */
 #undef WTF_PLATFORM_WIN_OS
 #undef WTF_PLATFORM_WIN
 #undef WTF_PLATFORM_CAIRO
 #define WTF_PLATFORM_S60 1
 #define WTF_PLATFORM_SYMBIAN 1
 #endif


 /* PLATFORM(NETBSD) */
 /* Operating system level dependencies for NetBSD that should be used */
 /* regardless of operating environment */
 #if defined(__NetBSD__)
 #define WTF_PLATFORM_NETBSD 1
 #endif

 /* PLATFORM(UNIX) */
 /* Operating system level dependencies for Unix-like systems that */
 /* should be used regardless of operating environment */
 #if   PLATFORM(DARWIN)     \
    || PLATFORM(FREEBSD)    \
    || PLATFORM(S60)        \
    || PLATFORM(NETBSD)     \
    || defined(unix)        \
    || defined(__unix)      \
    || defined(__unix__)    \
    || defined(_AIX)
 #define WTF_PLATFORM_UNIX 1
 #endif

 /* Operating environments */

 /* PLATFORM(CHROMIUM) */
 /* PLATFORM(QT) */
 /* PLATFORM(GTK) */
 /* PLATFORM(MAC) */
 /* PLATFORM(WIN) */
 #if defined(BUILDING_CHROMIUM__)
 #define WTF_PLATFORM_CHROMIUM 1
 #elif defined(BUILDING_QT__)
 #define WTF_PLATFORM_QT 1

 /* PLATFORM(KDE) */
 #if defined(BUILDING_KDE__)
 #define WTF_PLATFORM_KDE 1
 #endif

 #elif defined(BUILDING_WX__)
 #define WTF_PLATFORM_WX 1
 #elif defined(BUILDING_GTK__)
 #define WTF_PLATFORM_GTK 1
 #elif PLATFORM(DARWIN)
 #define WTF_PLATFORM_MAC 1
 #elif PLATFORM(WIN_OS)
 #define WTF_PLATFORM_WIN 1
 #endif

 /* Graphics engines */

 /* PLATFORM(CG) and PLATFORM(CI) */
 #if PLATFORM(MAC)
 #define WTF_PLATFORM_CG 1
 #define WTF_PLATFORM_CI 1
 #endif

 /* PLATFORM(SKIA) for Win/Linux, CG/CI for Mac */
 #if PLATFORM(CHROMIUM)
 #if PLATFORM(DARWIN)
 #define WTF_PLATFORM_CG 1
 #define WTF_PLATFORM_CI 1
 #define WTF_USE_ATSUI 1
 #else
 #define WTF_PLATFORM_SKIA 1
 #endif
 #endif

 /* Makes PLATFORM(WIN) default to PLATFORM(CAIRO) */
 /* FIXME: This should be changed from a blacklist to a whitelist */
 #if !PLATFORM(MAC) && !PLATFORM(QT) && !PLATFORM(WX) && !PLATFORM(CHROMIUM)
 #define WTF_PLATFORM_CAIRO 1
 #endif

 /* CPU */

 /* PLATFORM(PPC) */
 #if   defined(__ppc__)     \
    || defined(__PPC__)     \
    || defined(__powerpc__) \
    || defined(__powerpc)   \
    || defined(__POWERPC__) \
    || defined(_M_PPC)      \
    || defined(__PPC)
 #define WTF_PLATFORM_PPC 1
 #define WTF_PLATFORM_BIG_ENDIAN 1
 #endif

 /* PLATFORM(PPC64) */
 #if   defined(__ppc64__) \
    || defined(__PPC64__)
 #define WTF_PLATFORM_PPC64 1
 #define WTF_PLATFORM_BIG_ENDIAN 1
 #endif

 /* PLATFORM(ARM) */
 #if   defined(arm) \
    || defined(__arm__)
 #define WTF_PLATFORM_ARM 1
 #if defined(__ARMEB__)
 #define WTF_PLATFORM_BIG_ENDIAN 1
 #elif !defined(__ARM_EABI__) && !defined(__ARMEB__) && !defined(__VFP_FP__)
 #define WTF_PLATFORM_MIDDLE_ENDIAN 1
 #endif
 #if !defined(__ARM_EABI__)
 #define WTF_PLATFORM_FORCE_PACK 1
 #endif
 #endif

 /* PLATFORM(X86) */
 #if   defined(__i386__) \
    || defined(i386)     \
    || defined(_M_IX86)  \
    || defined(_X86_)    \
    || defined(__THW_INTEL)
 #define WTF_PLATFORM_X86 1
 #endif

 /* PLATFORM(X86_64) */
 #if   defined(__x86_64__) \
    || defined(_M_X64)
 #define WTF_PLATFORM_X86_64 1
 #endif

 /* PLATFORM(SH4) */
 #if defined(__SH4__)
 #define WTF_PLATFORM_SH4 1
 #endif

 /* PLATFORM(SPARC64) */
 #if defined(__sparc64__)
 #define WTF_PLATFORM_SPARC64 1
 #define WTF_PLATFORM_BIG_ENDIAN 1
 #endif

 /* PLATFORM(WIN_CE) && PLATFORM(QT)
    We can not determine the endianess at compile time. For
    Qt for Windows CE the endianess is specified in the
    device specific makespec
 */
 #if PLATFORM(WIN_CE) && PLATFORM(QT)
 #   include <QtGlobal>
 #   undef WTF_PLATFORM_BIG_ENDIAN
 #   undef WTF_PLATFORM_MIDDLE_ENDIAN
 #   if Q_BYTE_ORDER == Q_BIG_EDIAN
 #       define WTF_PLATFORM_BIG_ENDIAN 1
 #   endif
 #endif

 /* Compiler */

 /* COMPILER(MSVC) */
 #if defined(_MSC_VER)
 #define WTF_COMPILER_MSVC 1
 #if _MSC_VER < 1400
 #define WTF_COMPILER_MSVC7 1
 #endif
 #endif

 /* COMPILER(RVCT) */
 #if defined(__CC_ARM) || defined(__ARMCC__)
 #define WTF_COMPILER_RVCT 1
 #endif

 /* COMPILER(GCC) */
 /* --gnu option of the RVCT compiler also defines __GNUC__ */
 #if defined(__GNUC__) && !COMPILER(RVCT)
 #define WTF_COMPILER_GCC 1
 #endif

 /* COMPILER(MINGW) */
 #if defined(MINGW) || defined(__MINGW32__)
 #define WTF_COMPILER_MINGW 1
 #endif

 /* COMPILER(BORLAND) */
 /* not really fully supported - is this relevant any more? */
 #if defined(__BORLANDC__)
 #define WTF_COMPILER_BORLAND 1
 #endif

 /* COMPILER(CYGWIN) */
 /* not really fully supported - is this relevant any more? */
 #if defined(__CYGWIN__)
 #define WTF_COMPILER_CYGWIN 1
 #endif

 /* COMPILER(WINSCW) */
 #if defined(__WINSCW__)
 #define WTF_COMPILER_WINSCW 1
 #endif

 #if (PLATFORM(MAC) || PLATFORM(WIN)) && !defined(ENABLE_JSC_MULTIPLE_THREADS)
 #define ENABLE_JSC_MULTIPLE_THREADS 1
 #endif

 /* for Unicode, KDE uses Qt */
 #if PLATFORM(KDE) || PLATFORM(QT)
 #define WTF_USE_QT4_UNICODE 1
 #elif PLATFORM(SYMBIAN)
 #define WTF_USE_SYMBIAN_UNICODE 1
 #elif PLATFORM(GTK)
 /* The GTK+ Unicode backend is configurable */
 #else
 #define WTF_USE_ICU_UNICODE 1
 #endif

 #if PLATFORM(MAC)
 #define WTF_PLATFORM_CF 1
 #define WTF_USE_PTHREADS 1
 #if !defined(ENABLE_MAC_JAVA_BRIDGE)
 #define ENABLE_MAC_JAVA_BRIDGE 1
 #endif
 #if !defined(ENABLE_DASHBOARD_SUPPORT)
 #define ENABLE_DASHBOARD_SUPPORT 1
 #endif
 #define HAVE_READLINE 1
 #define HAVE_RUNLOOP_TIMER 1
 #endif

 #if PLATFORM(CHROMIUM) && PLATFORM(DARWIN)
 #define WTF_PLATFORM_CF 1
 #define WTF_USE_PTHREADS 1
 #endif

 #if PLATFORM(WIN)
 #define WTF_USE_WININET 1
 #endif

 #if PLATFORM(WX)
 #define ENABLE_ASSEMBLER 1
 #define WTF_USE_CURL 1
 #define WTF_USE_PTHREADS 1
 #endif

 #if PLATFORM(GTK)
 #if HAVE(PTHREAD_H)
 #define WTF_USE_PTHREADS 1
 #endif
 #endif

 #if !defined(HAVE_ACCESSIBILITY)
 #if PLATFORM(MAC) || PLATFORM(WIN) || PLATFORM(GTK) || PLATFORM(CHROMIUM)
 #define HAVE_ACCESSIBILITY 1
 #endif
 #endif /* !defined(HAVE_ACCESSIBILITY) */

 #if COMPILER(GCC)
 #define HAVE_COMPUTED_GOTO 1
 #endif

 #if PLATFORM(DARWIN)

 #define HAVE_ERRNO_H 1
 #define HAVE_LANGINFO_H 1
 #define HAVE_MMAP 1
 #define HAVE_MERGESORT 1
 #define HAVE_SBRK 1
 #define HAVE_STRINGS_H 1
 #define HAVE_SYS_PARAM_H 1
 #define HAVE_SYS_TIME_H 1
 #define HAVE_SYS_TIMEB_H 1

 #if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
 #define HAVE_MADV_FREE_REUSE 1
 #endif

 #define HAVE_MADV_FREE 1

 #elif PLATFORM(WIN_OS)

 #define HAVE_FLOAT_H 1
 #if PLATFORM(WIN_CE)
 #define HAVE_ERRNO_H 0
 #else
 #define HAVE_SYS_TIMEB_H 1
 #endif
 #define HAVE_VIRTUALALLOC 1

 #elif PLATFORM(SYMBIAN)

 #define HAVE_ERRNO_H 1
 #define HAVE_MMAP 0
 #define HAVE_SBRK 1

 #define HAVE_SYS_TIME_H 1
 #define HAVE_STRINGS_H 1

 #if !COMPILER(RVCT)
 #define HAVE_SYS_PARAM_H 1
 #endif

 #else

 /* FIXME: is this actually used or do other platforms generate their own config.h? */

 #define HAVE_ERRNO_H 1
 #define HAVE_LANGINFO_H 1
 #define HAVE_MMAP 1
 #define HAVE_SBRK 1
 #define HAVE_STRINGS_H 1
 #define HAVE_SYS_PARAM_H 1
 #define HAVE_SYS_TIME_H 1

 #endif

 /* ENABLE macro defaults */

 /* fastMalloc match validation allows for runtime verification that
    new is matched by delete, fastMalloc is matched by fastFree, etc. */
 #if !defined(ENABLE_FAST_MALLOC_MATCH_VALIDATION)
 #define ENABLE_FAST_MALLOC_MATCH_VALIDATION 0
 #endif

 #if !defined(ENABLE_ICONDATABASE)
 #define ENABLE_ICONDATABASE 1
 #endif

 #if !defined(ENABLE_DATABASE)
 #define ENABLE_DATABASE 1
 #endif

 #if !defined(ENABLE_JAVASCRIPT_DEBUGGER)
 #define ENABLE_JAVASCRIPT_DEBUGGER 1
 #endif

 #if !defined(ENABLE_FTPDIR)
 #define ENABLE_FTPDIR 1
 #endif

 #if !defined(ENABLE_DASHBOARD_SUPPORT)
 #define ENABLE_DASHBOARD_SUPPORT 0
 #endif

 #if !defined(ENABLE_MAC_JAVA_BRIDGE)
 #define ENABLE_MAC_JAVA_BRIDGE 0
 #endif

 #if !defined(ENABLE_NETSCAPE_PLUGIN_API)
 #define ENABLE_NETSCAPE_PLUGIN_API 1
 #endif

 #if !defined(ENABLE_OPCODE_STATS)
 #define ENABLE_OPCODE_STATS 0
 #endif

 #define ENABLE_SAMPLING_COUNTERS 0
 #define ENABLE_SAMPLING_FLAGS 0
 #define ENABLE_OPCODE_SAMPLING 0
 #define ENABLE_CODEBLOCK_SAMPLING 0
 #if ENABLE(CODEBLOCK_SAMPLING) && !ENABLE(OPCODE_SAMPLING)
 #error "CODEBLOCK_SAMPLING requires OPCODE_SAMPLING"
 #endif
 #if ENABLE(OPCODE_SAMPLING) || ENABLE(SAMPLING_FLAGS)
 #define ENABLE_SAMPLING_THREAD 1
 #endif

 #if !defined(ENABLE_GEOLOCATION)
 #define ENABLE_GEOLOCATION 0
 #endif

 #if !defined(ENABLE_TEXT_CARET)
 #define ENABLE_TEXT_CARET 1
 #endif

 #if !defined(ENABLE_ON_FIRST_TEXTAREA_FOCUS_SELECT_ALL)
 #define ENABLE_ON_FIRST_TEXTAREA_FOCUS_SELECT_ALL 0
 #endif

 #if !defined(WTF_USE_ALTERNATE_JSIMMEDIATE) && PLATFORM(X86_64) && PLATFORM(MAC)
 #define WTF_USE_ALTERNATE_JSIMMEDIATE 1
 #endif

 #if !defined(ENABLE_REPAINT_THROTTLING)
 #define ENABLE_REPAINT_THROTTLING 0
 #endif

 #if !defined(ENABLE_JIT)
 /* The JIT is tested & working on x86_64 Mac */
 #if PLATFORM(X86_64) && PLATFORM(MAC)
     #define ENABLE_JIT 1
     #define WTF_USE_JIT_STUB_ARGUMENT_REGISTER 1
 /* The JIT is tested & working on x86 Mac */
 #elif PLATFORM(X86) && PLATFORM(MAC)
     #define ENABLE_JIT 1
     #define WTF_USE_JIT_STUB_ARGUMENT_VA_LIST 1
 /* The JIT is tested & working on x86 Windows */
 #elif PLATFORM(X86) && PLATFORM(WIN)
     #define ENABLE_JIT 1
     #define WTF_USE_JIT_STUB_ARGUMENT_REGISTER 1
 #endif
     #define ENABLE_JIT_OPTIMIZE_CALL 1
     #define ENABLE_JIT_OPTIMIZE_PROPERTY_ACCESS 1
     #define ENABLE_JIT_OPTIMIZE_ARITHMETIC 1
 #endif

 #if ENABLE(JIT)
 #if !(USE(JIT_STUB_ARGUMENT_VA_LIST) || USE(JIT_STUB_ARGUMENT_REGISTER) || USE(JIT_STUB_ARGUMENT_STACK))
 #error Please define one of the JIT_STUB_ARGUMENT settings.
 #elif (USE(JIT_STUB_ARGUMENT_VA_LIST) && USE(JIT_STUB_ARGUMENT_REGISTER)) \
    || (USE(JIT_STUB_ARGUMENT_VA_LIST) && USE(JIT_STUB_ARGUMENT_STACK)) \
    || (USE(JIT_STUB_ARGUMENT_REGISTER) && USE(JIT_STUB_ARGUMENT_STACK))
 #error Please do not define more than one of the JIT_STUB_ARGUMENT settings.
 #endif
 #endif

 #if PLATFORM(X86_64)
     #define JSC_HOST_CALL
 #elif COMPILER(MSVC)
     #define JSC_HOST_CALL __fastcall
 #elif COMPILER(GCC) && PLATFORM(X86)
     #define JSC_HOST_CALL __attribute__ ((fastcall))
 #else
     #if ENABLE(JIT)
     #error Need to support register calling convention in this compiler
     #else
     #define JSC_HOST_CALL
     #endif
 #endif

 /* Yet Another Regex Runtime. */
 /* YARR supports x86 & x86-64, and has been tested on Mac and Windows. */
 #if (!defined(ENABLE_YARR_JIT) && PLATFORM(X86) && PLATFORM(MAC)) \
  || (!defined(ENABLE_YARR_JIT) && PLATFORM(X86_64) && PLATFORM(MAC)) \
  || (!defined(ENABLE_YARR_JIT) && PLATFORM(X86) && PLATFORM(WIN))
 #define ENABLE_YARR 1
 #define ENABLE_YARR_JIT 1
 #endif
 /* Sanity Check */
 #if ENABLE(YARR_JIT) && !ENABLE(YARR)
 #error "YARR_JIT requires YARR"
 #endif

 #if ENABLE(JIT) || ENABLE(YARR_JIT)
 #define ENABLE_ASSEMBLER 1
 #endif

 #if !defined(ENABLE_PAN_SCROLLING) && PLATFORM(WIN_OS)
 #define ENABLE_PAN_SCROLLING 1
 #endif

 #if !defined(ENABLE_ACTIVEX_TYPE_CONVERSION_WMPLAYER)
 #define ENABLE_ACTIVEX_TYPE_CONVERSION_WMPLAYER 1
 #endif

 /* Use the QtXmlStreamReader implementation for XMLTokenizer */
 #if PLATFORM(QT)
 #if !ENABLE(XSLT)
 #define WTF_USE_QXMLSTREAM 1
 #endif
 #endif

 #if !PLATFORM(QT)
 #define WTF_USE_FONT_FAST_PATH 1
 #endif

 #endif /* WTF_Platform_h */
	/*
	* Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. 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 with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#ifndef WTF_Platform_h
	#define WTF_Platform_h

	/* PLATFORM handles OS, operating environment, graphics API, and CPU */
	#define PLATFORM(WTF_FEATURE) (defined( WTF_PLATFORM_##WTF_FEATURE ) && WTF_PLATFORM_##WTF_FEATURE)
	#define COMPILER(WTF_FEATURE) (defined( WTF_COMPILER_##WTF_FEATURE ) && WTF_COMPILER_##WTF_FEATURE)
	#define HAVE(WTF_FEATURE) (defined( HAVE_##WTF_FEATURE ) && HAVE_##WTF_FEATURE)
	#define USE(WTF_FEATURE) (defined( WTF_USE_##WTF_FEATURE ) && WTF_USE_##WTF_FEATURE)
	#define ENABLE(WTF_FEATURE) (defined( ENABLE_##WTF_FEATURE ) && ENABLE_##WTF_FEATURE)

	/* Operating systems - low-level dependencies */

	/* PLATFORM(DARWIN) */
	/* Operating system level dependencies for Mac OS X / Darwin that should */
	/* be used regardless of operating environment */
	#ifdef __APPLE__
	#define WTF_PLATFORM_DARWIN 1
	#include <AvailabilityMacros.h>
	#if !defined(MAC_OS_X_VERSION_10_5) \|\| MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5
	#define BUILDING_ON_TIGER 1
	#elif !defined(MAC_OS_X_VERSION_10_6) \|\| MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
	#define BUILDING_ON_LEOPARD 1
	#endif
	#endif

	/* PLATFORM(WIN_OS) */
	/* Operating system level dependencies for Windows that should be used */
	/* regardless of operating environment */
	#if defined(WIN32) \|\| defined(_WIN32)
	#define WTF_PLATFORM_WIN_OS 1
	#endif

	/* PLATFORM(WIN_CE) */
	/* Operating system level dependencies for Windows CE that should be used */
	/* regardless of operating environment */
	/* Note that for this platform PLATFORM(WIN_OS) is also defined. */
	#if defined(_WIN32_WCE)
	#define WTF_PLATFORM_WIN_CE 1
	#endif

	/* PLATFORM(LINUX) */
	/* Operating system level dependencies for Linux-like systems that */
	/* should be used regardless of operating environment */
	#ifdef __linux__
	#define WTF_PLATFORM_LINUX 1
	#endif

	/* PLATFORM(FREEBSD) */
	/* Operating system level dependencies for FreeBSD-like systems that */
	/* should be used regardless of operating environment */
	#ifdef __FreeBSD__
	#define WTF_PLATFORM_FREEBSD 1
	#endif

	/* PLATFORM(OPENBSD) */
	/* Operating system level dependencies for OpenBSD systems that */
	/* should be used regardless of operating environment */
	#ifdef __OpenBSD__
	#define WTF_PLATFORM_OPENBSD 1
	#endif

	/* PLATFORM(SOLARIS) */
	/* Operating system level dependencies for Solaris that should be used */
	/* regardless of operating environment */
	#if defined(sun) \|\| defined(__sun)
	#define WTF_PLATFORM_SOLARIS 1
	#endif

	#if defined (__S60__) \|\| defined (__SYMBIAN32__)
	/* we are cross-compiling, it is not really windows */
	#undef WTF_PLATFORM_WIN_OS
	#undef WTF_PLATFORM_WIN
	#undef WTF_PLATFORM_CAIRO
	#define WTF_PLATFORM_S60 1
	#define WTF_PLATFORM_SYMBIAN 1
	#endif


	/* PLATFORM(NETBSD) */
	/* Operating system level dependencies for NetBSD that should be used */
	/* regardless of operating environment */
	#if defined(__NetBSD__)
	#define WTF_PLATFORM_NETBSD 1
	#endif

	/* PLATFORM(UNIX) */
	/* Operating system level dependencies for Unix-like systems that */
	/* should be used regardless of operating environment */
	#if PLATFORM(DARWIN) \
	\|\| PLATFORM(FREEBSD) \
	\|\| PLATFORM(S60) \
	\|\| PLATFORM(NETBSD) \
	\|\| defined(unix) \
	\|\| defined(__unix) \
	\|\| defined(__unix__) \
	\|\| defined(_AIX)
	#define WTF_PLATFORM_UNIX 1
	#endif

	/* Operating environments */

	/* PLATFORM(CHROMIUM) */
	/* PLATFORM(QT) */
	/* PLATFORM(GTK) */
	/* PLATFORM(MAC) */
	/* PLATFORM(WIN) */
	#if defined(BUILDING_CHROMIUM__)
	#define WTF_PLATFORM_CHROMIUM 1
	#elif defined(BUILDING_QT__)
	#define WTF_PLATFORM_QT 1

	/* PLATFORM(KDE) */
	#if defined(BUILDING_KDE__)
	#define WTF_PLATFORM_KDE 1
	#endif

	#elif defined(BUILDING_WX__)
	#define WTF_PLATFORM_WX 1
	#elif defined(BUILDING_GTK__)
	#define WTF_PLATFORM_GTK 1
	#elif PLATFORM(DARWIN)
	#define WTF_PLATFORM_MAC 1
	#elif PLATFORM(WIN_OS)
	#define WTF_PLATFORM_WIN 1
	#endif

	/* Graphics engines */

	/* PLATFORM(CG) and PLATFORM(CI) */
	#if PLATFORM(MAC)
	#define WTF_PLATFORM_CG 1
	#define WTF_PLATFORM_CI 1
	#endif

	/* PLATFORM(SKIA) for Win/Linux, CG/CI for Mac */
	#if PLATFORM(CHROMIUM)
	#if PLATFORM(DARWIN)
	#define WTF_PLATFORM_CG 1
	#define WTF_PLATFORM_CI 1
	#define WTF_USE_ATSUI 1
	#else
	#define WTF_PLATFORM_SKIA 1
	#endif
	#endif

	/* Makes PLATFORM(WIN) default to PLATFORM(CAIRO) */
	/* FIXME: This should be changed from a blacklist to a whitelist */
	#if !PLATFORM(MAC) && !PLATFORM(QT) && !PLATFORM(WX) && !PLATFORM(CHROMIUM)
	#define WTF_PLATFORM_CAIRO 1
	#endif

	/* CPU */

	/* PLATFORM(PPC) */
	#if defined(__ppc__) \
	\|\| defined(__PPC__) \
	\|\| defined(__powerpc__) \
	\|\| defined(__powerpc) \
	\|\| defined(__POWERPC__) \
	\|\| defined(_M_PPC) \
	\|\| defined(__PPC)
	#define WTF_PLATFORM_PPC 1
	#define WTF_PLATFORM_BIG_ENDIAN 1
	#endif

	/* PLATFORM(PPC64) */
	#if defined(__ppc64__) \
	\|\| defined(__PPC64__)
	#define WTF_PLATFORM_PPC64 1
	#define WTF_PLATFORM_BIG_ENDIAN 1
	#endif

	/* PLATFORM(ARM) */
	#if defined(arm) \
	\|\| defined(__arm__)
	#define WTF_PLATFORM_ARM 1
	#if defined(__ARMEB__)
	#define WTF_PLATFORM_BIG_ENDIAN 1
	#elif !defined(__ARM_EABI__) && !defined(__ARMEB__) && !defined(__VFP_FP__)
	#define WTF_PLATFORM_MIDDLE_ENDIAN 1
	#endif
	#if !defined(__ARM_EABI__)
	#define WTF_PLATFORM_FORCE_PACK 1
	#endif
	#endif

	/* PLATFORM(X86) */
	#if defined(__i386__) \
	\|\| defined(i386) \
	\|\| defined(_M_IX86) \
	\|\| defined(_X86_) \
	\|\| defined(__THW_INTEL)
	#define WTF_PLATFORM_X86 1
	#endif

	/* PLATFORM(X86_64) */
	#if defined(__x86_64__) \
	\|\| defined(_M_X64)
	#define WTF_PLATFORM_X86_64 1
	#endif

	/* PLATFORM(SH4) */
	#if defined(__SH4__)
	#define WTF_PLATFORM_SH4 1
	#endif

	/* PLATFORM(SPARC64) */
	#if defined(__sparc64__)
	#define WTF_PLATFORM_SPARC64 1
	#define WTF_PLATFORM_BIG_ENDIAN 1
	#endif

	/* PLATFORM(WIN_CE) && PLATFORM(QT)
	We can not determine the endianess at compile time. For
	Qt for Windows CE the endianess is specified in the
	device specific makespec
	*/
	#if PLATFORM(WIN_CE) && PLATFORM(QT)
	# include <QtGlobal>
	# undef WTF_PLATFORM_BIG_ENDIAN
	# undef WTF_PLATFORM_MIDDLE_ENDIAN
	# if Q_BYTE_ORDER == Q_BIG_EDIAN
	# define WTF_PLATFORM_BIG_ENDIAN 1
	# endif
	#endif

	/* Compiler */

	/* COMPILER(MSVC) */
	#if defined(_MSC_VER)
	#define WTF_COMPILER_MSVC 1
	#if _MSC_VER < 1400
	#define WTF_COMPILER_MSVC7 1
	#endif
	#endif

	/* COMPILER(RVCT) */
	#if defined(__CC_ARM) \|\| defined(__ARMCC__)
	#define WTF_COMPILER_RVCT 1
	#endif

	/* COMPILER(GCC) */
	/* --gnu option of the RVCT compiler also defines __GNUC__ */
	#if defined(__GNUC__) && !COMPILER(RVCT)
	#define WTF_COMPILER_GCC 1
	#endif

	/* COMPILER(MINGW) */
	#if defined(MINGW) \|\| defined(__MINGW32__)
	#define WTF_COMPILER_MINGW 1
	#endif

	/* COMPILER(BORLAND) */
	/* not really fully supported - is this relevant any more? */
	#if defined(__BORLANDC__)
	#define WTF_COMPILER_BORLAND 1
	#endif

	/* COMPILER(CYGWIN) */
	/* not really fully supported - is this relevant any more? */
	#if defined(__CYGWIN__)
	#define WTF_COMPILER_CYGWIN 1
	#endif

	/* COMPILER(WINSCW) */
	#if defined(__WINSCW__)
	#define WTF_COMPILER_WINSCW 1
	#endif

	#if (PLATFORM(MAC) \|\| PLATFORM(WIN)) && !defined(ENABLE_JSC_MULTIPLE_THREADS)
	#define ENABLE_JSC_MULTIPLE_THREADS 1
	#endif

	/* for Unicode, KDE uses Qt */
	#if PLATFORM(KDE) \|\| PLATFORM(QT)
	#define WTF_USE_QT4_UNICODE 1
	#elif PLATFORM(SYMBIAN)
	#define WTF_USE_SYMBIAN_UNICODE 1
	#elif PLATFORM(GTK)
	/* The GTK+ Unicode backend is configurable */
	#else
	#define WTF_USE_ICU_UNICODE 1
	#endif

	#if PLATFORM(MAC)
	#define WTF_PLATFORM_CF 1
	#define WTF_USE_PTHREADS 1
	#if !defined(ENABLE_MAC_JAVA_BRIDGE)
	#define ENABLE_MAC_JAVA_BRIDGE 1
	#endif
	#if !defined(ENABLE_DASHBOARD_SUPPORT)
	#define ENABLE_DASHBOARD_SUPPORT 1
	#endif
	#define HAVE_READLINE 1
	#define HAVE_RUNLOOP_TIMER 1
	#endif

	#if PLATFORM(CHROMIUM) && PLATFORM(DARWIN)
	#define WTF_PLATFORM_CF 1
	#define WTF_USE_PTHREADS 1
	#endif

	#if PLATFORM(WIN)
	#define WTF_USE_WININET 1
	#endif

	#if PLATFORM(WX)
	#define ENABLE_ASSEMBLER 1
	#define WTF_USE_CURL 1
	#define WTF_USE_PTHREADS 1
	#endif

	#if PLATFORM(GTK)
	#if HAVE(PTHREAD_H)
	#define WTF_USE_PTHREADS 1
	#endif
	#endif

	#if !defined(HAVE_ACCESSIBILITY)
	#if PLATFORM(MAC) \|\| PLATFORM(WIN) \|\| PLATFORM(GTK) \|\| PLATFORM(CHROMIUM)
	#define HAVE_ACCESSIBILITY 1
	#endif
	#endif /* !defined(HAVE_ACCESSIBILITY) */

	#if COMPILER(GCC)
	#define HAVE_COMPUTED_GOTO 1
	#endif

	#if PLATFORM(DARWIN)

	#define HAVE_ERRNO_H 1
	#define HAVE_LANGINFO_H 1
	#define HAVE_MMAP 1
	#define HAVE_MERGESORT 1
	#define HAVE_SBRK 1
	#define HAVE_STRINGS_H 1
	#define HAVE_SYS_PARAM_H 1
	#define HAVE_SYS_TIME_H 1
	#define HAVE_SYS_TIMEB_H 1

	#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
	#define HAVE_MADV_FREE_REUSE 1
	#endif

	#define HAVE_MADV_FREE 1

	#elif PLATFORM(WIN_OS)

	#define HAVE_FLOAT_H 1
	#if PLATFORM(WIN_CE)
	#define HAVE_ERRNO_H 0
	#else
	#define HAVE_SYS_TIMEB_H 1
	#endif
	#define HAVE_VIRTUALALLOC 1

	#elif PLATFORM(SYMBIAN)

	#define HAVE_ERRNO_H 1
	#define HAVE_MMAP 0
	#define HAVE_SBRK 1

	#define HAVE_SYS_TIME_H 1
	#define HAVE_STRINGS_H 1

	#if !COMPILER(RVCT)
	#define HAVE_SYS_PARAM_H 1
	#endif

	#else

	/* FIXME: is this actually used or do other platforms generate their own config.h? */

	#define HAVE_ERRNO_H 1
	#define HAVE_LANGINFO_H 1
	#define HAVE_MMAP 1
	#define HAVE_SBRK 1
	#define HAVE_STRINGS_H 1
	#define HAVE_SYS_PARAM_H 1
	#define HAVE_SYS_TIME_H 1

	#endif

	/* ENABLE macro defaults */

	/* fastMalloc match validation allows for runtime verification that
	new is matched by delete, fastMalloc is matched by fastFree, etc. */
	#if !defined(ENABLE_FAST_MALLOC_MATCH_VALIDATION)
	#define ENABLE_FAST_MALLOC_MATCH_VALIDATION 0
	#endif

	#if !defined(ENABLE_ICONDATABASE)
	#define ENABLE_ICONDATABASE 1
	#endif

	#if !defined(ENABLE_DATABASE)
	#define ENABLE_DATABASE 1
	#endif

	#if !defined(ENABLE_JAVASCRIPT_DEBUGGER)
	#define ENABLE_JAVASCRIPT_DEBUGGER 1
	#endif

	#if !defined(ENABLE_FTPDIR)
	#define ENABLE_FTPDIR 1
	#endif

	#if !defined(ENABLE_DASHBOARD_SUPPORT)
	#define ENABLE_DASHBOARD_SUPPORT 0
	#endif

	#if !defined(ENABLE_MAC_JAVA_BRIDGE)
	#define ENABLE_MAC_JAVA_BRIDGE 0
	#endif

	#if !defined(ENABLE_NETSCAPE_PLUGIN_API)
	#define ENABLE_NETSCAPE_PLUGIN_API 1
	#endif

	#if !defined(ENABLE_OPCODE_STATS)
	#define ENABLE_OPCODE_STATS 0
	#endif

	#define ENABLE_SAMPLING_COUNTERS 0
	#define ENABLE_SAMPLING_FLAGS 0
	#define ENABLE_OPCODE_SAMPLING 0
	#define ENABLE_CODEBLOCK_SAMPLING 0
	#if ENABLE(CODEBLOCK_SAMPLING) && !ENABLE(OPCODE_SAMPLING)
	#error "CODEBLOCK_SAMPLING requires OPCODE_SAMPLING"
	#endif
	#if ENABLE(OPCODE_SAMPLING) \|\| ENABLE(SAMPLING_FLAGS)
	#define ENABLE_SAMPLING_THREAD 1
	#endif

	#if !defined(ENABLE_GEOLOCATION)
	#define ENABLE_GEOLOCATION 0
	#endif

	#if !defined(ENABLE_TEXT_CARET)
	#define ENABLE_TEXT_CARET 1
	#endif

	#if !defined(ENABLE_ON_FIRST_TEXTAREA_FOCUS_SELECT_ALL)
	#define ENABLE_ON_FIRST_TEXTAREA_FOCUS_SELECT_ALL 0
	#endif

	#if !defined(WTF_USE_ALTERNATE_JSIMMEDIATE) && PLATFORM(X86_64) && PLATFORM(MAC)
	#define WTF_USE_ALTERNATE_JSIMMEDIATE 1
	#endif

	#if !defined(ENABLE_REPAINT_THROTTLING)
	#define ENABLE_REPAINT_THROTTLING 0
	#endif

	#if !defined(ENABLE_JIT)
	/* The JIT is tested & working on x86_64 Mac */
	#if PLATFORM(X86_64) && PLATFORM(MAC)
	#define ENABLE_JIT 1
	#define WTF_USE_JIT_STUB_ARGUMENT_REGISTER 1
	/* The JIT is tested & working on x86 Mac */
	#elif PLATFORM(X86) && PLATFORM(MAC)
	#define ENABLE_JIT 1
	#define WTF_USE_JIT_STUB_ARGUMENT_VA_LIST 1
	/* The JIT is tested & working on x86 Windows */
	#elif PLATFORM(X86) && PLATFORM(WIN)
	#define ENABLE_JIT 1
	#define WTF_USE_JIT_STUB_ARGUMENT_REGISTER 1
	#endif
	#define ENABLE_JIT_OPTIMIZE_CALL 1
	#define ENABLE_JIT_OPTIMIZE_PROPERTY_ACCESS 1
	#define ENABLE_JIT_OPTIMIZE_ARITHMETIC 1
	#endif

	#if ENABLE(JIT)
	#if !(USE(JIT_STUB_ARGUMENT_VA_LIST) \|\| USE(JIT_STUB_ARGUMENT_REGISTER) \|\| USE(JIT_STUB_ARGUMENT_STACK))
	#error Please define one of the JIT_STUB_ARGUMENT settings.
	#elif (USE(JIT_STUB_ARGUMENT_VA_LIST) && USE(JIT_STUB_ARGUMENT_REGISTER)) \
	\|\| (USE(JIT_STUB_ARGUMENT_VA_LIST) && USE(JIT_STUB_ARGUMENT_STACK)) \
	\|\| (USE(JIT_STUB_ARGUMENT_REGISTER) && USE(JIT_STUB_ARGUMENT_STACK))
	#error Please do not define more than one of the JIT_STUB_ARGUMENT settings.
	#endif
	#endif

	#if PLATFORM(X86_64)
	#define JSC_HOST_CALL
	#elif COMPILER(MSVC)
	#define JSC_HOST_CALL __fastcall
	#elif COMPILER(GCC) && PLATFORM(X86)
	#define JSC_HOST_CALL __attribute__ ((fastcall))
	#else
	#if ENABLE(JIT)
	#error Need to support register calling convention in this compiler
	#else
	#define JSC_HOST_CALL
	#endif
	#endif

	/* Yet Another Regex Runtime. */
	/* YARR supports x86 & x86-64, and has been tested on Mac and Windows. */
	#if (!defined(ENABLE_YARR_JIT) && PLATFORM(X86) && PLATFORM(MAC)) \
	\|\| (!defined(ENABLE_YARR_JIT) && PLATFORM(X86_64) && PLATFORM(MAC)) \
	\|\| (!defined(ENABLE_YARR_JIT) && PLATFORM(X86) && PLATFORM(WIN))
	#define ENABLE_YARR 1
	#define ENABLE_YARR_JIT 1
	#endif
	/* Sanity Check */
	#if ENABLE(YARR_JIT) && !ENABLE(YARR)
	#error "YARR_JIT requires YARR"
	#endif

	#if ENABLE(JIT) \|\| ENABLE(YARR_JIT)
	#define ENABLE_ASSEMBLER 1
	#endif

	#if !defined(ENABLE_PAN_SCROLLING) && PLATFORM(WIN_OS)
	#define ENABLE_PAN_SCROLLING 1
	#endif

	#if !defined(ENABLE_ACTIVEX_TYPE_CONVERSION_WMPLAYER)
	#define ENABLE_ACTIVEX_TYPE_CONVERSION_WMPLAYER 1
	#endif

	/* Use the QtXmlStreamReader implementation for XMLTokenizer */
	#if PLATFORM(QT)
	#if !ENABLE(XSLT)
	#define WTF_USE_QXMLSTREAM 1
	#endif
	#endif

	#if !PLATFORM(QT)
	#define WTF_USE_FONT_FAST_PATH 1
	#endif

	#endif /* WTF_Platform_h */