Unconditionally expand STATIC_ASSERT to the C++11 form.

include/v8config.h

 // 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.
@@ skipping 145 matching lines @@
 //  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
 //
 //  V8_HAS_CXX11_ALIGNAS        - alignas specifier supported
 //  V8_HAS_CXX11_ALIGNOF        - alignof(type) operator supported
-//  V8_HAS_CXX11_STATIC_ASSERT  - static_assert() supported
 //
 // Compiler-specific feature detection
 //
 //  V8_HAS___ALIGNOF                    - __alignof(type) operator supported
 //  V8_HAS___ALIGNOF__                  - __alignof__(type) operator supported
 //  V8_HAS_ATTRIBUTE_ALIGNED            - __attribute__((aligned(n))) supported
 //  V8_HAS_ATTRIBUTE_ALWAYS_INLINE      - __attribute__((always_inline))
 //                                        supported
 //  V8_HAS_ATTRIBUTE_DEPRECATED         - __attribute__((deprecated)) supported
 //  V8_HAS_ATTRIBUTE_NOINLINE           - __attribute__((noinline)) supported
@@ skipping 46 matching lines @@
 # 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))
 
 # define V8_HAS_CXX11_ALIGNAS (__has_feature(cxx_alignas))
-# define V8_HAS_CXX11_STATIC_ASSERT (__has_feature(cxx_static_assert))
 
 #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
@@ skipping 26 matching lines @@
 
 // g++ requires -std=c++0x or -std=gnu++0x to support C++11 functionality
 // without warnings (functionality used by the macros below).  These modes
 // are detectable by checking whether __GXX_EXPERIMENTAL_CXX0X__ is defined or,
 // more standardly, by checking whether __cplusplus has a C++11 or greater
 // value. Current versions of g++ do not correctly set __cplusplus, so we check
 // both for forward compatibility.
 # if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
 #  define V8_HAS_CXX11_ALIGNAS (V8_GNUC_PREREQ(4, 8, 0))
 #  define V8_HAS_CXX11_ALIGNOF (V8_GNUC_PREREQ(4, 8, 0))
-#  define V8_HAS_CXX11_STATIC_ASSERT (V8_GNUC_PREREQ(4, 3, 0))
 # endif
 #endif
 
 #if defined(_MSC_VER)
 # define V8_CC_MSVC 1
 # define V8_HAS___ALIGNOF 1
 
 # define V8_HAS_DECLSPEC_ALIGN 1
 # define V8_HAS_DECLSPEC_DEPRECATED 1
 # define V8_HAS_DECLSPEC_NOINLINE 1
@@ skipping 141 matching lines @@
 //   int foo() 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
 
 // clang-format on
 
 #endif  // V8CONFIG_H_