private void saveConfigs(IProject project, ICConfigurationDescription[] cfgds) {
   try {
     String projectName = project.getName();
     IPath output = project.getLocation().append(CFG_FILE_NAME);
     File f = output.toFile();
     if (!f.exists()) f.createNewFile();
     if (f.exists()) {
       try (PrintWriter p = new PrintWriter(new BufferedWriter(new FileWriter(f)))) {
         Map<String, IAConfiguration> cfgs = configs.get(projectName);
         p.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); // $NON-NLS-1$
         p.println("<configurations>"); // $NON-NLS-1$
         Option[] optionList = AutotoolsConfiguration.getOptionList();
         // Before saving, force any cloning to occur via the option
         // value handler.
         setSyncing(true);
         for (int i = 0; i < cfgds.length; ++i) {
           @SuppressWarnings("unused")
           CConfigurationData data = cfgds[i].getConfigurationData();
         }
         setSyncing(false);
         for (int i = 0; i < cfgds.length; ++i) {
           ICConfigurationDescription cfgd = cfgds[i];
           String id = cfgd.getId();
           IAConfiguration cfg = cfgs.get(id);
           if (cfg == null) {
             cfg = createDefaultConfiguration(id);
           }
           p.println("<configuration id=\"" + cfg.getId() + "\">"); // $NON-NLS-1$ //$NON-NLS-2$
           for (int j = 0; j < optionList.length; ++j) {
             Option option = optionList[j];
             IConfigureOption opt = cfg.getOption(option.getName());
             if (opt.isFlag()) {
               p.println(
                   "<flag id=\""
                       + option.getName()
                       + "\" value=\"" //$NON-NLS-1$ //$NON-NLS-2$
                       + xmlEscape(option.getDefaultValue())
                       + "\">"); //$NON-NLS-1$
               FlagConfigureOption fco = (FlagConfigureOption) opt;
               List<String> children = fco.getChildren();
               for (int k = 0; k < children.size(); ++k) {
                 String childName = children.get(k);
                 IConfigureOption childopt = cfg.getOption(childName);
                 p.println(
                     "<flagvalue id=\""
                         + childopt.getName()
                         + "\" value=\"" //$NON-NLS-1$ //$NON-NLS-2$
                         + xmlEscape(childopt.getValue())
                         + "\"/>"); // $NON-NLS-3$
               }
               p.println("</flag>"); // $NON-NLS-1$
             } else if (!opt.isCategory() && !opt.isFlagValue())
               p.println(
                   "<option id=\""
                       + option.getName()
                       + "\" value=\""
                       + xmlEscape(opt.getValue()) // $NON-NLS-1$ //$NON-NLS-2$
                       + "\"/>"); // $NON-NLS-3$
           }
           p.println("</configuration>"); // $NON-NLS-1$
           // Sync name field as this configuration is now
           // officially saved
           syncNameField(cfgd);
         }
         p.println("</configurations>");
       }
     }
   } catch (IOException e) {
     AutotoolsPlugin.log(e);
   }
 }