- Add strndup for Mac OS X version < 10.7.

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 378 matching lines @@
 inline D bit_copy(const S& source) {
   D destination;
   // This use of memcpy is safe: source and destination cannot overlap.
   memcpy(&destination,
          reinterpret_cast<const void*>(&source),
          sizeof(destination));
   return destination;
 }
 
 
+// Some platforms do not support strndup. We add it below as necessary.
+#if defined(TARGET_OS_MACOS)
+// strndup has only been added to Mac OS X in 10.7. We are supplying
+// our own copy here.
+#if !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || \
+    __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ <= 1060
+#define NEEDS_STRNDUP 1
+#endif  // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
+#elif defined(TARGET_OS_WINDOWS)
+#define NEEDS_STRNDUP 1
+#endif  // defined(TARGET_OS_MACOS)
+
+#if defined(NEEDS_STRNDUP)
+// size_t used to match function signature on other platforms.
+inline char* strndup(const char* s, size_t n) {
+  size_t len = strlen(s);
+  if (n < len) {
+    len = n;
+  }
+  char* result = reinterpret_cast<char*>(malloc(len + 1));
+  if (!result) {
+    return NULL;
+  }
+  result[len] = '\0';
+  return reinterpret_cast<char*>(memcpy(result, s, len));
+}
+#endif  // defined(NEEDS_STRNDUP)
+#undef NEEDS_STRNDUP
+
+
 // A macro to ensure that memcpy cannot be called. memcpy does not handle
 // overlapping memory regions. Even though this is well documented it seems
 // to be used in error quite often. To avoid problems we disallow the direct
 // use of memcpy here.
 //
 // On Android and Windows the basic libraries use memcpy and therefore
 // compilation will fail if memcpy is overwritten even if user code does not
 // use memcpy.
 #if defined(memcpy)
 #undef memcpy
@@ skipping 39 matching lines @@
 // N.B.: As the GCC manual states, "[s]ince non-static C++ methods
 // have an implicit 'this' argument, the arguments of such methods
 // should be counted from two, not one."
 #define PRINTF_ATTRIBUTE(string_index, first_to_check) \
   __attribute__((__format__(__printf__, string_index, first_to_check)))
 #else
 #define PRINTF_ATTRIBUTE(string_index, first_to_check)
 #endif
 
 #endif  // PLATFORM_GLOBALS_H_