Bug 113239 new compiler option 'fatalOptionalError'
* COMPILER / Treating Optional Error as Fatal * When enabled, optional errors (i.e. optional problems which severity is set to "error") will be treated as standard * compiler errors, yielding problem methods/types preventing from running offending code until the issue got resolved. * When disabled, optional errors are only considered as warnings, still carrying an error indication to make them more * severe. Note that by default, errors are fatal, whether they are optional or not. * - option id: "org.eclipse.jdt.core.compiler.problem.fatalOptionalError" * - possible values: { "enabled", "disabled" } * - default: "enabled" </pre>
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaBuildConfigurationBlock.java
othersComposite.setLayout(new GridLayout(nColumns, false));
		
		label= PreferencesMessages.JavaBuildConfigurationBlock_pb_max_per_unit_label; 
		Text text= addTextField(othersComposite, label, PREF_PB_MAX_PER_UNIT, 0, 0);
		GridData gd= (GridData) text.getLayoutData();
		gd.widthHint= fPixelConverter.convertWidthInCharsToPixels(8);
		gd.horizontalAlignment= GridData.END;
		text.setTextLimit(6);
		
		label= PreferencesMessages.JavaBuildConfigurationBlock_enable_exclusion_patterns_label; 
		addCheckBox(othersComposite, label, PREF_ENABLE_EXCLUSION_PATTERNS, enableDisableValues, 0);
		label= PreferencesMessages.JavaBuildConfigurationBlock_enable_multiple_outputlocations_label; 
		addCheckBox(othersComposite, label, PREF_ENABLE_MULTIPLE_OUTPUT_LOCATIONS, enableDisableValues, 0);
		label= PreferencesMessages.JavaBuildConfigurationBlock_section_build_path_problems; 
		excomposite= createStyleSection(composite, label, nColumns);
		
		othersComposite= new Composite(excomposite, SWT.NONE);
		excomposite.setClient(othersComposite);
		othersComposite.setLayout(new GridLayout(nColumns, false));
		
		label= PreferencesMessages.JavaBuildConfigurationBlock_build_invalid_classpath_label; 
		addCheckBox(othersComposite, label, PREF_BUILD_INVALID_CLASSPATH, abortIgnoreValues, 0);
		label= PreferencesMessages.JavaBuildConfigurationBlock_pb_incomplete_build_path_label; 
		addComboBox(othersComposite, label, PREF_PB_INCOMPLETE_BUILDPATH, errorWarning, errorWarningLabels, 0);	
		
		label= PreferencesMessages.JavaBuildConfigurationBlock_pb_build_path_cycles_label; 
		addComboBox(othersComposite, label, PREF_PB_CIRCULAR_BUILDPATH, errorWarning, errorWarningLabels, 0);
		
		label= PreferencesMessages.JavaBuildConfigurationBlock_pb_check_prereq_binary_level_label;  
		addComboBox(othersComposite, label, PREF_PB_INCOMPATIBLE_JDK_LEVEL, errorWarningIgnore, errorWarningIgnoreLabels, 0);