GN: Fix Debug flags. Fix Windows build.

runtime/platform/globals.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 280 matching lines @@
 // exit(), which end the program. We use it to avoid compiler warnings in
 // callers of DART_NORETURN functions.
 #ifdef _MSC_VER
 #define DART_NORETURN __declspec(noreturn)
 #elif __GNUC__
 #define DART_NORETURN __attribute__((noreturn))
 #else
 #error Automatic compiler detection failed.
 #endif
 
+#ifdef _MSC_VER
+#define DART_PRETTY_FUNCTION __FUNCSIG__
+#elif __GNUC__
+#define DART_PRETTY_FUNCTION __PRETTY_FUNCTION__
+#else
+#error Automatic compiler detection failed.
+#endif
+
 #if !defined(TARGET_ARCH_MIPS)
 #if !defined(TARGET_ARCH_ARM)
 #if !defined(TARGET_ARCH_X64)
 #if !defined(TARGET_ARCH_IA32)
 #if !defined(TARGET_ARCH_ARM64)
 #if !defined(TARGET_ARCH_DBC)
 // No target architecture specified pick the one matching the host architecture.
 #if defined(HOST_ARCH_MIPS)
 #define TARGET_ARCH_MIPS 1
 #elif defined(HOST_ARCH_ARM)
@@ skipping 388 matching lines @@
 // tag in the ICData and check it when recreating the flow graph in
 // optimizing compiler. Enable it for other modes (product, release) if needed
 // for debugging.
 #if defined(DEBUG)
 #define TAG_IC_DATA
 #endif
 
 }  // namespace dart
 
 #endif  // PLATFORM_GLOBALS_H_