clang::DiagnosticsEnginge::getCustomDiagID now needs a literal FormatString

...at least in trunk 200400 towards Clang 3.5.

Change-Id: Ibe956a7f28c16510506bd354582b3fe5a72582e5

compilerplugins/clang/compat.hxx

@@ -12,6 +12,9 @@
 
 #include "clang/AST/Decl.h"
 #include "clang/AST/Type.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticIDs.h"
+#include "llvm/ADT/StringRef.h"
 
 // Compatibility wrapper to abstract over (trivial) chanes in the Clang API:
 namespace compat {
@@ -42,6 +45,18 @@ inline clang::QualType getParamType(
 #endif
 }
 
+inline unsigned getCustomDiagID(
+    clang::DiagnosticsEngine const & engine, clang::DiagnosticsEngine::Level L,
+    llvm::StringRef FormatString)
+{
+#if (__clang_major__ == 3 && __clang_minor__ >= 5) || __clang_major__ > 3
+    return engine.getDiagnosticIDs()->getCustomDiagID(
+        static_cast<clang::DiagnosticIDs::Level>(L), FormatString);
+#else
+    return engine.getCustomDiagID(L, FormatString);
+#endif
+}
+
 }
 
 #endif

compilerplugins/clang/pluginhandler.cxx

@@ -9,6 +9,7 @@
  *
  */
 
+#include "compat.hxx"
 #include "pluginhandler.hxx"
 
 #include <clang/Frontend/CompilerInstance.h>
@@ -161,9 +162,9 @@ DiagnosticBuilder PluginHandler::report( DiagnosticsEngine::Level level, const c
         }
     fullMessage += "]";
     if( loc.isValid())
-        return diag.Report( loc, diag.getCustomDiagID( level, fullMessage ));
+        return diag.Report( loc, compat::getCustomDiagID(diag, level, fullMessage) );
     else
-        return diag.Report( diag.getCustomDiagID( level, fullMessage ));
+        return diag.Report( compat::getCustomDiagID(diag, level, fullMessage) );
     }
 
 DiagnosticBuilder PluginHandler::report( DiagnosticsEngine::Level level, StringRef message, SourceLocation loc )