Windows/Path.inc: Move <shlobj.h> after "Windows.h" for some API available.

[oota-llvm.git] / lib / Support / Windows / Windows.h

diff --git a/lib/Support/Windows/Windows.h b/lib/Support/Windows/Windows.h
index 657ae4fc8382f3eb143783635a0eb77746cd894e..5666de267d72efb2a8a81910ec3ddf4336ee8a31 100644 (file)
--- a/lib/Support/Windows/Windows.h
+++ b/lib/Support/Windows/Windows.h
@@ -18,6 +18,7 @@
 
 // mingw-w64 tends to define it as 0x0502 in its headers.
 #undef _WIN32_WINNT
+#undef _WIN32_IE
 
 // Require at least Windows XP(5.1) API.
 #define _WIN32_WINNT 0x0501
@@ -39,11 +40,16 @@ inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
   if (!ErrMsg)
     return true;
   char *buffer = NULL;
-  FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
-      NULL, GetLastError(), 0, (LPSTR)&buffer, 1, NULL);
-  *ErrMsg = prefix + buffer;
+  DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                          FORMAT_MESSAGE_FROM_SYSTEM,
+                          NULL, GetLastError(), 0, (LPSTR)&buffer, 1, NULL);
+  if (R)
+    *ErrMsg = prefix + buffer;
+  else
+    *ErrMsg = prefix + "Unknown error";
+
   LocalFree(buffer);
-  return true;
+  return R != 0;
 }
 
 template <typename HandleTraits>