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- // Copyright 2013 the V8 project authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
-
- #ifndef V8CONFIG_H_
- #define V8CONFIG_H_
-
- // clang-format off
-
- // Platform headers for feature detection below.
- #if defined(__ANDROID__)
- # include <sys/cdefs.h>
- #elif defined(__APPLE__)
- # include <TargetConditionals.h>
- #elif defined(__linux__)
- # include <features.h>
- #endif
-
-
- // This macro allows to test for the version of the GNU C library (or
- // a compatible C library that masquerades as glibc). It evaluates to
- // 0 if libc is not GNU libc or compatible.
- // Use like:
- // #if V8_GLIBC_PREREQ(2, 3)
- // ...
- // #endif
- #if defined(__GLIBC__) && defined(__GLIBC_MINOR__)
- # define V8_GLIBC_PREREQ(major, minor) \
- ((__GLIBC__ * 100 + __GLIBC_MINOR__) >= ((major) * 100 + (minor)))
- #else
- # define V8_GLIBC_PREREQ(major, minor) 0
- #endif
-
-
- // This macro allows to test for the version of the GNU C++ compiler.
- // Note that this also applies to compilers that masquerade as GCC,
- // for example clang and the Intel C++ compiler for Linux.
- // Use like:
- // #if V8_GNUC_PREREQ(4, 3, 1)
- // ...
- // #endif
- #if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
- # define V8_GNUC_PREREQ(major, minor, patchlevel) \
- ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= \
- ((major) * 10000 + (minor) * 100 + (patchlevel)))
- #elif defined(__GNUC__) && defined(__GNUC_MINOR__)
- # define V8_GNUC_PREREQ(major, minor, patchlevel) \
- ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >= \
- ((major) * 10000 + (minor) * 100 + (patchlevel)))
- #else
- # define V8_GNUC_PREREQ(major, minor, patchlevel) 0
- #endif
-
-
-
- // -----------------------------------------------------------------------------
- // Operating system detection
- //
- // V8_OS_ANDROID - Android
- // 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_FUCHSIA - Fuchsia
- // V8_OS_LINUX - Linux
- // V8_OS_MACOSX - Mac OS X
- // V8_OS_IOS - iOS
- // 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_AIX - AIX
- // 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
- # define V8_OS_POSIX 1
- # if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
- # define V8_OS_IOS 1
- # endif // defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
- #elif defined(__CYGWIN__)
- # define V8_OS_CYGWIN 1
- # define V8_OS_POSIX 1
- #elif defined(__linux__)
- # define V8_OS_LINUX 1
- # define V8_OS_POSIX 1
- #elif defined(__sun)
- # define V8_OS_POSIX 1
- # define V8_OS_SOLARIS 1
- #elif defined(_AIX)
- #define V8_OS_POSIX 1
- #define V8_OS_AIX 1
- #elif defined(__FreeBSD__)
- # define V8_OS_BSD 1
- # define V8_OS_FREEBSD 1
- # define V8_OS_POSIX 1
- #elif defined(__Fuchsia__)
- # define V8_OS_FUCHSIA 1
- # define V8_OS_POSIX 1
- #elif defined(__DragonFly__)
- # define V8_OS_BSD 1
- # 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_MSVCRT - MSVC libc
- // V8_LIBC_BIONIC - Bionic libc
- // V8_LIBC_BSD - BSD libc derivate
- // V8_LIBC_GLIBC - GNU C library
- // V8_LIBC_UCLIBC - uClibc
- //
- // Note that testing for libc must be done using #if not #ifdef. For example,
- // to test for the GNU C library, use:
- // #if V8_LIBC_GLIBC
- // ...
- // #endif
-
- #if defined (_MSC_VER)
- # define V8_LIBC_MSVCRT 1
- #elif defined(__BIONIC__)
- # define V8_LIBC_BIONIC 1
- # define V8_LIBC_BSD 1
- #elif defined(__UCLIBC__)
- // Must test for UCLIBC before GLIBC, as UCLIBC pretends to be GLIBC.
- # define V8_LIBC_UCLIBC 1
- #elif defined(__GLIBC__) || defined(__GNU_LIBRARY__)
- # define V8_LIBC_GLIBC 1
- #else
- # define V8_LIBC_BSD V8_OS_BSD
- #endif
-
-
- // -----------------------------------------------------------------------------
- // Compiler detection
- //
- // V8_CC_GNU - GCC, or clang in gcc mode
- // V8_CC_INTEL - Intel C++
- // V8_CC_MINGW - Minimalist GNU for Windows
- // V8_CC_MINGW32 - Minimalist GNU for Windows (mingw32)
- // V8_CC_MINGW64 - Minimalist GNU for Windows (mingw-w64)
- // V8_CC_MSVC - Microsoft Visual C/C++, or clang in cl.exe mode
- //
- // C++11 feature detection
- //
- // Compiler-specific feature detection
- //
- // V8_HAS_ATTRIBUTE_ALWAYS_INLINE - __attribute__((always_inline))
- // supported
- // V8_HAS_ATTRIBUTE_DEPRECATED - __attribute__((deprecated)) supported
- // V8_HAS_ATTRIBUTE_NOINLINE - __attribute__((noinline)) supported
- // V8_HAS_ATTRIBUTE_UNUSED - __attribute__((unused)) supported
- // V8_HAS_ATTRIBUTE_VISIBILITY - __attribute__((visibility)) supported
- // V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT - __attribute__((warn_unused_result))
- // supported
- // V8_HAS_BUILTIN_BSWAP16 - __builtin_bswap16() supported
- // V8_HAS_BUILTIN_BSWAP32 - __builtin_bswap32() supported
- // V8_HAS_BUILTIN_BSWAP64 - __builtin_bswap64() supported
- // V8_HAS_BUILTIN_CLZ - __builtin_clz() supported
- // V8_HAS_BUILTIN_CTZ - __builtin_ctz() supported
- // V8_HAS_BUILTIN_EXPECT - __builtin_expect() supported
- // V8_HAS_BUILTIN_FRAME_ADDRESS - __builtin_frame_address() supported
- // V8_HAS_BUILTIN_POPCOUNT - __builtin_popcount() supported
- // V8_HAS_BUILTIN_SADD_OVERFLOW - __builtin_sadd_overflow() supported
- // V8_HAS_BUILTIN_SSUB_OVERFLOW - __builtin_ssub_overflow() supported
- // V8_HAS_BUILTIN_UADD_OVERFLOW - __builtin_uadd_overflow() supported
- // V8_HAS_DECLSPEC_DEPRECATED - __declspec(deprecated) supported
- // V8_HAS_DECLSPEC_NOINLINE - __declspec(noinline) supported
- // V8_HAS_DECLSPEC_SELECTANY - __declspec(selectany) supported
- // V8_HAS_DECLSPEC_NORETURN - __declspec(noreturn) supported
- // V8_HAS___FORCEINLINE - __forceinline supported
- //
- // Note that testing for compilers and/or features must be done using #if
- // not #ifdef. For example, to test for Intel C++ Compiler, use:
- // #if V8_CC_INTEL
- // ...
- // #endif
-
- #if defined(__clang__)
-
- #if defined(__GNUC__) // Clang in gcc mode.
- # define V8_CC_GNU 1
- #endif
-
- # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (__has_attribute(always_inline))
- # define V8_HAS_ATTRIBUTE_DEPRECATED (__has_attribute(deprecated))
- # define V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE \
- (__has_extension(attribute_deprecated_with_message))
- # define V8_HAS_ATTRIBUTE_NOINLINE (__has_attribute(noinline))
- # define V8_HAS_ATTRIBUTE_UNUSED (__has_attribute(unused))
- # define V8_HAS_ATTRIBUTE_VISIBILITY (__has_attribute(visibility))
- # define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \
- (__has_attribute(warn_unused_result))
-
- # define V8_HAS_BUILTIN_BSWAP16 (__has_builtin(__builtin_bswap16))
- # define V8_HAS_BUILTIN_BSWAP32 (__has_builtin(__builtin_bswap32))
- # define V8_HAS_BUILTIN_BSWAP64 (__has_builtin(__builtin_bswap64))
- # define V8_HAS_BUILTIN_CLZ (__has_builtin(__builtin_clz))
- # define V8_HAS_BUILTIN_CTZ (__has_builtin(__builtin_ctz))
- # define V8_HAS_BUILTIN_EXPECT (__has_builtin(__builtin_expect))
- # define V8_HAS_BUILTIN_FRAME_ADDRESS (__has_builtin(__builtin_frame_address))
- # define V8_HAS_BUILTIN_POPCOUNT (__has_builtin(__builtin_popcount))
- # define V8_HAS_BUILTIN_SADD_OVERFLOW (__has_builtin(__builtin_sadd_overflow))
- # define V8_HAS_BUILTIN_SSUB_OVERFLOW (__has_builtin(__builtin_ssub_overflow))
- # define V8_HAS_BUILTIN_UADD_OVERFLOW (__has_builtin(__builtin_uadd_overflow))
-
- # if __cplusplus >= 201402L
- # define V8_CAN_HAVE_DCHECK_IN_CONSTEXPR 1
- # endif
-
- #elif defined(__GNUC__)
-
- # define V8_CC_GNU 1
- # if defined(__INTEL_COMPILER) // Intel C++ also masquerades as GCC 3.2.0
- # define V8_CC_INTEL 1
- # endif
- # if defined(__MINGW32__)
- # define V8_CC_MINGW32 1
- # endif
- # if defined(__MINGW64__)
- # define V8_CC_MINGW64 1
- # endif
- # define V8_CC_MINGW (V8_CC_MINGW32 || V8_CC_MINGW64)
-
- // always_inline is available in gcc 4.0 but not very reliable until 4.4.
- // Works around "sorry, unimplemented: inlining failed" build errors with
- // older compilers.
- # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (V8_GNUC_PREREQ(4, 4, 0))
- # define V8_HAS_ATTRIBUTE_DEPRECATED (V8_GNUC_PREREQ(3, 4, 0))
- # define V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE (V8_GNUC_PREREQ(4, 5, 0))
- # define V8_HAS_ATTRIBUTE_NOINLINE (V8_GNUC_PREREQ(3, 4, 0))
- # define V8_HAS_ATTRIBUTE_UNUSED (V8_GNUC_PREREQ(2, 95, 0))
- # define V8_HAS_ATTRIBUTE_VISIBILITY (V8_GNUC_PREREQ(4, 3, 0))
- # define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \
- (!V8_CC_INTEL && V8_GNUC_PREREQ(4, 1, 0))
-
- # define V8_HAS_BUILTIN_CLZ (V8_GNUC_PREREQ(3, 4, 0))
- # define V8_HAS_BUILTIN_CTZ (V8_GNUC_PREREQ(3, 4, 0))
- # define V8_HAS_BUILTIN_EXPECT (V8_GNUC_PREREQ(2, 96, 0))
- # define V8_HAS_BUILTIN_FRAME_ADDRESS (V8_GNUC_PREREQ(2, 96, 0))
- # define V8_HAS_BUILTIN_POPCOUNT (V8_GNUC_PREREQ(3, 4, 0))
-
- #endif
-
- #if defined(_MSC_VER)
- # define V8_CC_MSVC 1
-
- # define V8_HAS_DECLSPEC_DEPRECATED 1
- # define V8_HAS_DECLSPEC_NOINLINE 1
- # define V8_HAS_DECLSPEC_SELECTANY 1
- # define V8_HAS_DECLSPEC_NORETURN 1
-
- # define V8_HAS___FORCEINLINE 1
-
- #endif
-
-
- // -----------------------------------------------------------------------------
- // Helper macros
-
- // A macro used to make better inlining. Don't bother for debug builds.
- // Use like:
- // V8_INLINE int GetZero() { return 0; }
- #if !defined(DEBUG) && V8_HAS_ATTRIBUTE_ALWAYS_INLINE
- # define V8_INLINE inline __attribute__((always_inline))
- #elif !defined(DEBUG) && V8_HAS___FORCEINLINE
- # define V8_INLINE __forceinline
- #else
- # define V8_INLINE inline
- #endif
-
-
- // A macro used to tell the compiler to never inline a particular function.
- // Don't bother for debug builds.
- // Use like:
- // V8_NOINLINE int GetMinusOne() { return -1; }
- #if !defined(DEBUG) && V8_HAS_ATTRIBUTE_NOINLINE
- # define V8_NOINLINE __attribute__((noinline))
- #elif !defined(DEBUG) && V8_HAS_DECLSPEC_NOINLINE
- # define V8_NOINLINE __declspec(noinline)
- #else
- # define V8_NOINLINE /* NOT SUPPORTED */
- #endif
-
-
- // A macro (V8_DEPRECATED) to mark classes or functions as deprecated.
- #if defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE
- #define V8_DEPRECATED(message, declarator) \
- declarator __attribute__((deprecated(message)))
- #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED
- #define V8_DEPRECATED(message, declarator) \
- declarator __attribute__((deprecated))
- #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_DECLSPEC_DEPRECATED
- #define V8_DEPRECATED(message, declarator) __declspec(deprecated) declarator
- #else
- #define V8_DEPRECATED(message, declarator) declarator
- #endif
-
-
- // A macro (V8_DEPRECATE_SOON) to make it easier to see what will be deprecated.
- #if defined(V8_IMMINENT_DEPRECATION_WARNINGS) && \
- V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE
- #define V8_DEPRECATE_SOON(message, declarator) \
- declarator __attribute__((deprecated(message)))
- #elif defined(V8_IMMINENT_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED
- #define V8_DEPRECATE_SOON(message, declarator) \
- declarator __attribute__((deprecated))
- #elif defined(V8_IMMINENT_DEPRECATION_WARNINGS) && V8_HAS_DECLSPEC_DEPRECATED
- #define V8_DEPRECATE_SOON(message, declarator) __declspec(deprecated) declarator
- #else
- #define V8_DEPRECATE_SOON(message, declarator) declarator
- #endif
-
-
- // A macro to provide the compiler with branch prediction information.
- #if V8_HAS_BUILTIN_EXPECT
- # define V8_UNLIKELY(condition) (__builtin_expect(!!(condition), 0))
- # define V8_LIKELY(condition) (__builtin_expect(!!(condition), 1))
- #else
- # define V8_UNLIKELY(condition) (condition)
- # define V8_LIKELY(condition) (condition)
- #endif
-
-
- // Annotate a function indicating the caller must examine the return value.
- // Use like:
- // int foo() V8_WARN_UNUSED_RESULT;
- #if V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT
- #define V8_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
- #else
- #define V8_WARN_UNUSED_RESULT /* NOT SUPPORTED */
- #endif
-
- #if defined(BUILDING_V8_SHARED) && defined(USING_V8_SHARED)
- #error Inconsistent build configuration: To build the V8 shared library \
- set BUILDING_V8_SHARED, to include its headers for linking against the \
- V8 shared library set USING_V8_SHARED.
- #endif
-
- #ifdef V8_OS_WIN
-
- // Setup for Windows DLL export/import. When building the V8 DLL the
- // BUILDING_V8_SHARED needs to be defined. When building a program which uses
- // the V8 DLL USING_V8_SHARED needs to be defined. When either building the V8
- // static library or building a program which uses the V8 static library neither
- // BUILDING_V8_SHARED nor USING_V8_SHARED should be defined.
- #ifdef BUILDING_V8_SHARED
- # define V8_EXPORT __declspec(dllexport)
- #elif USING_V8_SHARED
- # define V8_EXPORT __declspec(dllimport)
- #else
- # define V8_EXPORT
- #endif // BUILDING_V8_SHARED
-
- #else // V8_OS_WIN
-
- // Setup for Linux shared library export.
- #if V8_HAS_ATTRIBUTE_VISIBILITY
- # ifdef BUILDING_V8_SHARED
- # define V8_EXPORT __attribute__ ((visibility("default")))
- # else
- # define V8_EXPORT
- # endif
- #else
- # define V8_EXPORT
- #endif
-
- #endif // V8_OS_WIN
-
- // clang-format on
-
- #endif // V8CONFIG_H_
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