Fix darwin build

1. In Drawin PTHREAD_ONCE_INIT is {0x30B1BCBA, {0}} and the GCC < 4.4
   doesn't support ended initializer list
2. wcsncasecmp doesn't exist in MacSDK10.6.x

Change-Id: I69204a72f853f5263dffedc448379d75ed4eca2e

bfd/peXXigen.c

@@ -3696,6 +3696,28 @@ u16_mbtouc (wchar_t * puc, const unsigned short * s, unsigned int n)
 }
 #endif /* HAVE_WCHAR_H and not Cygwin/Mingw */
 
+#if defined __APPLE__ && __DARWIN_C_LEVEL < 200809L
+/* wcsncasecmp isn't always defined in Mac SDK */
+static int
+wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
+{
+  wchar_t c1, c2;
+
+  if (n == 0)
+    return (0);
+  for (; *s1; s1++, s2++)
+  {
+    c1 = towlower(*s1);
+    c2 = towlower(*s2);
+    if (c1 != c2)
+      return ((int)c1 - c2);
+    if (--n == 0)
+      return (0);
+  }
+  return (-*s2);
+}
+#endif
+
 /* Perform a comparison of two entries.  */
 static signed int
 rsrc_cmp (bfd_boolean is_name, rsrc_entry * a, rsrc_entry * b)

gold/gold-threads.cc

@@ -284,9 +284,18 @@ Condvar::~Condvar()
 class Once_initialize
 {
  public:
-  Once_initialize()
-    : once_(PTHREAD_ONCE_INIT)
-  { }
+   Once_initialize()
+#if !defined(__APPLE__)
+     : once_(PTHREAD_ONCE_INIT)
+   { }
+#else
+// In Drawin PTHREAD_ONCE_INIT is {0x30B1BCBA, {0}} and the GCC < 4.4 doesn't support
+// extended initializer list as above */
+   {
+     pthread_once_t once_2 = PTHREAD_ONCE_INIT;
+     once_ = once_2; 
+   }
+#endif
 
   // Return a pointer to the pthread_once_t variable.
   pthread_once_t*