Provide configuration support and usage for MINGW32 platform


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28639 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Win32/DynamicLibrary.inc b/lib/System/Win32/DynamicLibrary.inc
index 310d3dc..d214ba0 100644
--- a/lib/System/Win32/DynamicLibrary.inc
+++ b/lib/System/Win32/DynamicLibrary.inc
@@ -14,12 +14,18 @@
 #include "Win32.h"
 
 #ifdef __MINGW32__
-#include <imagehlp.h>
+ #include <imagehlp.h>
 #else
-#include <dbghelp.h>
+ #include <dbghelp.h>
 #endif
 
-#pragma comment(lib, "dbghelp.lib")
+#ifdef __MINGW32__
+ #if (HAVE_LIBIMAGEHLP != 1)
+  #error "libimagehlp.a should be present"
+ #endif
+#else
+ #pragma comment(lib, "dbghelp.lib")
+#endif
 
 namespace llvm {
 using namespace sys;