{$ENDIF}
end;

procedure TMainForm.btnBuildClick(Sender: TObject);
var
  buildSuccess: boolean;
  buildOpts: string;
  preproc: string;
  logFileName: string = '';
  outputFileName: string;
begin
  // Reset status display:
  MainStatusBar.Panels[1].Text := '';

  BuildWindow := TBuildStatusWindow.Create(Application);
  BuildWindow.Show;

  // Build the parameters:
  buildOpts := 'groff';

  // - Macro:
  if LeftStr(cmbMacro.Text, 1) = 'm' then buildOpts := buildOpts + ' -' + cmbMacro.Text;

  // - Enforce UTF-8:
  buildOpts := buildOpts + ' -Kutf8';

  // - Preprocessors:
  if chkBoxPreprocessors.Checked[0] then  preproc := preproc + 'chem | ';

  if chkBoxPreprocessors.Checked[1] then  buildOpts := buildOpts + ' -e';   // eqn
  if chkBoxPreprocessors.Checked[2] then  buildOpts := buildOpts + ' -g';   // grn
  if chkBoxPreprocessors.Checked[3] then  buildOpts := buildOpts + ' -p';   // pic
  if chkBoxPreprocessors.Checked[4] then  buildOpts := buildOpts + ' -R';   // refer
  if chkBoxPreprocessors.Checked[5] then  buildOpts := buildOpts + ' -t';   // tbl

  if chkBoxExtras.Checked[0] then  buildOpts := buildOpts + ' -mhdtbl';

  // - PDF-specifics:
{$IFNDEF WINDOWS}
  // On Windows, we use a two-step program:
  // 1) Output to PostScript,

  buildOpts := buildOpts + ' ' + currentGroffFilePath;
  buildOpts := buildOpts + ' > ' + outputFileName;

  // - Log file:
  if chkLogFile.Checked then logFileName := currentGroffFilePath + '.log';

  // Build:
  buildOpts := preproc + buildOpts;
  buildSuccess := BuildWindow.BuildDocument(buildOpts, logFileName);

{$IFDEF WINDOWS}
  if buildSuccess and hasGhostscript and rdPdf.Checked then
{$ELSE}
  // On non-Windows systems, Ghostscript is entirely optional.
  if buildSuccess and hasGhostscript and chkUseGhostscript.Checked and rdPdf.Checked then