Remove (untested) code for unsupported compilers.

src/base/platform/platform.h

 // Copyright 2012 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.
 
 // This module contains the platform-specific code. This make the rest of the
 // code less dependent on operating system, compilers and runtime libraries.
 // This module does specifically not deal with differences between different
 // processor architecture.
 // The platform classes have the same definition for all platforms. The
 // implementation for a particular platform is put in platform_<os>.cc.
 // The build system then uses the implementation for the target platform.
 //
 // This design has been chosen because it is simple and fast. Alternatively,
 // the platform dependent classes could have been implemented using abstract
 // superclasses with virtual methods and having specializations for each
 // platform. This design was rejected because it was more complicated and
 // slower. It would require factory methods for selecting the right
 // implementation and the overhead of virtual methods for performance
 // sensitive like mutex locking/unlocking.
 
 #ifndef V8_BASE_PLATFORM_PLATFORM_H_
 #define V8_BASE_PLATFORM_PLATFORM_H_
 
-#include <stdarg.h>
+#include <cstdarg>
 #include <string>
 #include <vector>
 
 #include "src/base/build_config.h"
 #include "src/base/platform/mutex.h"
 #include "src/base/platform/semaphore.h"
 
 #if V8_OS_QNX
 #include "src/base/qnx-math.h"
 #endif
 
-// Microsoft Visual C++ specific stuff.
-#if V8_LIBC_MSVCRT
-
-#include "src/base/win32-headers.h"
-#include "src/base/win32-math.h"
-
-int strncasecmp(const char* s1, const char* s2, int n);
-
-// Visual C++ 2013 and higher implement this function.
-#if (_MSC_VER < 1800)
-inline int lrint(double flt) {
-  int intgr;
-#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
-  __asm {
-    fld flt
-    fistp intgr
-  };
-#else
-  intgr = static_cast<int>(flt + 0.5);
-  if ((intgr & 1) != 0 && intgr - flt == 0.5) {
-    // If the number is halfway between two integers, round to the even one.
-    intgr--;
-  }
-#endif
-  return intgr;
-}
-#endif  // _MSC_VER < 1800
-
-#endif  // V8_LIBC_MSVCRT
-
 namespace v8 {
 namespace base {
 
 // ----------------------------------------------------------------------------
 // Fast TLS support
 
 #ifndef V8_NO_FAST_TLS
 
-#if defined(_MSC_VER) && (V8_HOST_ARCH_IA32)
+#if V8_CC_MSVC && V8_HOST_ARCH_IA32
 
 #define V8_FAST_TLS_SUPPORTED 1
 
 INLINE(intptr_t InternalGetExistingThreadLocal(intptr_t index));
 
 inline intptr_t InternalGetExistingThreadLocal(intptr_t index) {
   const intptr_t kTibInlineTlsOffset = 0xE10;
   const intptr_t kTibExtraTlsOffset = 0xF94;
   const intptr_t kMaxInlineSlots = 64;
   const intptr_t kMaxSlots = kMaxInlineSlots + 1024;
@@ skipping 414 matching lines @@
   char name_[kMaxThreadNameLength];
   int stack_size_;
   Semaphore* start_semaphore_;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
 } }  // namespace v8::base
 
 #endif  // V8_BASE_PLATFORM_PLATFORM_H_