getting at the compiler error messages array?

Clang Frontend
1

Ive added clang to my music application to compile audio plugins.
Using the interpreter example as a base code, how do I get to the
error messages array buffer so can add the messages to my code
compiler window?

Thanks.

2

Check the Diagnostics section of Doxygen, in particular, the
DiagnosticClient

http://clang.llvm.org/doxygen/classclang_1_1DiagnosticClient.html

Remember you can create your own to suit your own format. Pass the
DiagnosticClient to your compiler instance.

3

ok, i have changed from:

TextDiagnosticPrinter *DiagClient =
    new TextDiagnosticPrinter(llvm::errs(), DiagnosticOptions());

  Diagnostic Diags(DiagClient);
  Driver TheDriver(Path.str(), llvm::sys::getHostTriple(),
    "a.out", /*IsProduction=*/false, /*CXXIsProduction=*/false,
    Diags);

to:

TextDiagnosticBuffer *DiagClient =
    new TextDiagnosticBuffer();

  Diagnostic Diags(DiagClient);

  Driver TheDriver(Path.str(), llvm::sys::getHostTriple(),
    "a.out", /*IsProduction=*/false, /*CXXIsProduction=*/false,
    Diags);

but when i add the following code, I get get no errors reported even
though I have added some errors to my c code.

if (!Clang.ExecuteAction(*Act))
  {
    TextDiagnosticBuffer::const_iterator itTextDiagnosticBuffer;

    {
                        vector<std::String> vWarnings;
      int iTotalWarnings = 0;
      for (itTextDiagnosticBuffer = DiagClient->warn_begin();
itTextDiagnosticBuffer != DiagClient->warn_end();
++itTextDiagnosticBuffer)
      {
        vWarnings.push_back(itTextDiagnosticBuffer->second.data());
        iTotalWarnings++;
      }

      char cErrorText[255];
      sprintf (cErrorText, "Total %d warnings!", iTotalWarnings);
    }

    {
                        vector<std::String> vErrors;
      int iTotalErrors = 0;
      for (itTextDiagnosticBuffer = DiagClient->err_begin();
itTextDiagnosticBuffer != DiagClient->err_end();
++itTextDiagnosticBuffer)
      {
        vErrors.push_back(itTextDiagnosticBuffer->second.data());
        iTotalErrors++;
      }

      char cErrorText[255];
      sprintf (cErrorText, "Total %d errors!", iTotalErrors);
    }

  }

what am i doing wrong?

4

No matter what I try I can't get at the compiler error messages buffer.

I have tried using code ive found on the net but due to the changing
api, I can't get this to work.

This is what ive got, based on the interpreter example.
Please, someone point me in the right direction.

void LLVMErrorHandler(void *UserData, const std::string &Message)
{
    Diagnostic &Diags = *static_cast<Diagnostic*>(UserData);
    Diags.Report(diag::err_fe_error_backend) << Message;
               :
     // We cannot recover from llvm errors.
     exit(1);
}

TextDiagnosticBuffer *DiagClient = new TextDiagnosticBuffer();
Diagnostic Diags(DiagClient);
Driver TheDriver(Path.str(), llvm::sys::getHostTriple(),
               "a.out", /*IsProduction=*/false, /*CXXIsProduction=*/false,
               Diags);

llvm::llvm_install_error_handler(LLVMErrorHandler,
                            static_cast<void*>(&Clang.getDiagnostics()));

if (!Clang.ExecuteAction(*Act))
{
    TextDiagnosticBuffer::const_iterator itTextDiagnosticBuffer;
    {
         vector<std::String> vWarnings;
         int iTotalWarnings = 0;
         for (itTextDiagnosticBuffer = DiagClient->warn_begin();
itTextDiagnosticBuffer != DiagClient->warn_end();
++itTextDiagnosticBuffer)
         {
                vWarnings.push_back(itTextDiagnosticBuffer->second.data());
                 iTotalWarnings++;
         }

         char cErrorText[255];
         sprintf (cErrorText, "Total %d warnings!", iTotalWarnings);
       }

       {
             vector<std::String> vErrors;
             int iTotalErrors = 0;
             for (itTextDiagnosticBuffer = DiagClient->err_begin();
itTextDiagnosticBuffer != DiagClient->err_end();
++itTextDiagnosticBuffer)
             {
                     vErrors.push_back(itTextDiagnosticBuffer->second.data());
                      iTotalErrors++;
             }

              char cErrorText[255];
             sprintf (cErrorText, "Total %d errors!", iTotalErrors);
       }
}