Add support for building the Dart VM for Android OS.

runtime/platform/globals.h

Index: runtime/platform/globals.h
diff --git a/runtime/platform/globals.h b/runtime/platform/globals.h
index 8ca5065ac611dbb17eca14bf79e35bcd4d00e33d..0b53d62e9a56dde2d46f0a0607bc1f314fec4598 100644
--- a/runtime/platform/globals.h
+++ b/runtime/platform/globals.h
@@ -52,7 +52,9 @@
 // for more information on predefined macros:
 //   - http://msdn.microsoft.com/en-us/library/b0084kay.aspx
 //   - with gcc, run: "echo | gcc -E -dM -"
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(__ANDROID__)
+#define TARGET_OS_ANDROID
+#elif defined(__linux__) || defined(__FreeBSD__)
 #define TARGET_OS_LINUX 1
 #elif defined(__APPLE__)
 #define TARGET_OS_MACOS 1
@@ -330,7 +332,11 @@ inline D bit_copy(const S& source) {
 #if defined(memcpy)
 #undef memcpy
 #endif
-#if !defined(TARGET_OS_WINDOWS)
+#if defined(TARGET_OS_ANDROID)
+  // Need to allow memcpy, it's used by stlport headers

[cshapiro, 2012/08/07 20:56:54]

Why not mention android in the comment on line 330 and then have

#if defined(TARGET_OS_ANDROID) || defined(TARGET_OS_WINDOWS)

instead?

[jackpal, 2012/08/07 21:43:26]

Done.

+#elif defined(TARGET_OS_WINDOWS)
+  // Allow memcpy
+#else
 #define memcpy "Please use memmove instead of memcpy."
 #endif