Don't report unknown built-in functions as problems.

codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/internal/checkers/ProblemBindingChecker.java

@@ -40,6 +40,7 @@ import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTTemplateId;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunction;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPMethod;
+import org.eclipse.cdt.core.parser.util.CharArrayUtils;
 import org.eclipse.cdt.internal.core.dom.parser.ASTQueries;
 
 public class ProblemBindingChecker extends AbstractIndexAstChecker {
@@ -145,6 +146,10 @@ public class ProblemBindingChecker extends AbstractIndexAstChecker {
 							if (id != IProblemBinding.SEMANTIC_NAME_NOT_FOUND) {
 								return PROCESS_CONTINUE;
 							}
+							if (problemBinding.getID() == IProblemBinding.SEMANTIC_NAME_NOT_FOUND &&
+									CharArrayUtils.startsWith(problemBinding.getNameCharArray(), "__builtin_")) { //$NON-NLS-1$
+								return PROCESS_CONTINUE;  // Ignore an unknown built-in.
+							}
 							if (isFunctionCall(name, parentNode)) {
 								handleFunctionProblem(name, problemBinding, contextFlagsString);
 							} else if (parentNode instanceof IASTFieldReference) {
@@ -152,7 +157,7 @@ public class ProblemBindingChecker extends AbstractIndexAstChecker {
 							} else if (parentNode instanceof IASTNamedTypeSpecifier) {
 								reportProblem(ERR_ID_TypeResolutionProblem, name, name.getRawSignature(), contextFlagsString);
 							} else {
-								// Probably a variable
+								// Probably a variable.
 								handleVariableProblem(name, contextFlagsString);
 							}
 						}

core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/GCCBuiltinSymbolProvider.java

@@ -109,13 +109,13 @@ public class GCCBuiltinSymbolProvider implements IBuiltinBindingsProvider {
 		function("void", 		"__builtin_va_end",  "va_list");
 		function("void", 		"__builtin_va_copy",  "va_list", "va_list");
 
-		// Gcc 4.6.0, Section 6.48
+		// GCC 4.6.0, Section 6.48
 		function("void*", 		"__builtin_return_address",  "unsigned int");
 		function("void*", 		"__builtin_extract_return_address",  "void*");
 		function("void*", 		"__builtin_frob_return_address",  "void*");
 		function("void*", 		"__builtin_frame_address",  "unsigned int");
 
-		// Gcc 4.6.0, Section 6.51
+		// GCC 4.6.0, Section 6.51
 		String[] types= {"int", "long", "long long", "unsigned int", "unsigned long", "unsigned long long"};
 		for (String type : types) {
 			// Manual does not mention volatile, however functions can be used for ptr to volatile
@@ -137,7 +137,7 @@ public class GCCBuiltinSymbolProvider implements IBuiltinBindingsProvider {
 		}
 		function("void", 	"__sync_synchronize");
 
-		// Gcc 4.6.0, Section 6.52
+		// GCC 4.8, Section 6.52
 		for (String type : types) {
 			// Manual does not mention volatile, however functions can be used for ptr to volatile
 			String typePtr= "volatile " + type + "*";
@@ -171,7 +171,7 @@ public class GCCBuiltinSymbolProvider implements IBuiltinBindingsProvider {
 			function("bool",	"__atomic_is_lock_free", "size_t", "void*");
 		}
 
-		// GCC 4.8.0, Section 6.55 (incomplete)
+		// GCC 4.8, Section 6.55 (incomplete)
 		function("void", 		"__builtin_abort", "void");
 		function("int", 		"__builtin_abs", "int");
 		function("double", 		"__builtin_acos", "double");

core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOMWriter.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2007, 2012 Wind River Systems, Inc. and others.
+ * Copyright (c) 2007, 2013 Wind River Systems, Inc. and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -51,6 +51,7 @@ import org.eclipse.cdt.core.index.IIndexInclude;
 import org.eclipse.cdt.core.parser.FileContent;
 import org.eclipse.cdt.core.parser.IProblem;
 import org.eclipse.cdt.core.parser.ISignificantMacros;
+import org.eclipse.cdt.core.parser.util.CharArrayUtils;
 import org.eclipse.cdt.internal.core.dom.parser.ASTInternal;
 import org.eclipse.cdt.internal.core.dom.parser.cpp.ICPPUnknownBinding;
 import org.eclipse.cdt.internal.core.index.FileContentKey;
@@ -72,6 +73,7 @@ import org.eclipse.osgi.util.NLS;
  * @since 4.0
  */
 abstract public class PDOMWriter {
+	private static final boolean REPORT_UNKNOWN_BUILTINS = false;
 
 	public static class FileInAST {
 		final IASTPreprocessorIncludeStatement includeStatement;
@@ -343,9 +345,14 @@ abstract public class PDOMWriter {
 								binding instanceof ICPPFunctionTemplate)) {
 								na[0]= null;
 						} else if (binding instanceof IProblemBinding) {
-							fStatistics.fProblemBindingCount++;
+							IProblemBinding problemBinding = (IProblemBinding) binding;
-							if (fShowProblems) {
+							if (REPORT_UNKNOWN_BUILTINS ||
-								reportProblem((IProblemBinding) binding);
+									problemBinding.getID() != IProblemBinding.BINDING_NOT_FOUND ||
+									!CharArrayUtils.startsWith(problemBinding.getNameCharArray(), "__builtin_")) { //$NON-NLS-1$
+								fStatistics.fProblemBindingCount++;
+								if (fShowProblems) {
+									reportProblem(problemBinding);
+								}
 							}
 						} else if (name.isReference()) {
 							if (binding instanceof ICPPTemplateParameter ||

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/SemanticHighlightings.java

@@ -58,6 +58,7 @@ import org.eclipse.cdt.core.index.IIndex;
 import org.eclipse.cdt.core.index.IIndexBinding;
 import org.eclipse.cdt.core.index.IIndexFile;
 import org.eclipse.cdt.core.index.IIndexName;
+import org.eclipse.cdt.core.parser.util.CharArrayUtils;
 import org.eclipse.cdt.ui.CUIPlugin;
 import org.eclipse.cdt.ui.PreferenceConstants;
 import org.eclipse.cdt.ui.text.ISemanticToken;
@@ -1321,7 +1322,7 @@ public class SemanticHighlightings {
 		public boolean consumes(ISemanticToken token) {
 			IASTNode node= token.getNode();
 			if (node.getTranslationUnit().isBasedOnIncompleteIndex()) {
-				// Do not highlight problems is the AST is unreliable.
+				// Do not highlight problems if the AST is unreliable.
 				return false;
 			}
 			if (node instanceof IASTProblem) {
@@ -1329,6 +1330,11 @@ public class SemanticHighlightings {
 			}
 			IBinding binding= token.getBinding();
 			if (binding instanceof IProblemBinding) {
+				IProblemBinding problemBinding = (IProblemBinding) binding;
+				if (problemBinding.getID() == IProblemBinding.SEMANTIC_NAME_NOT_FOUND &&
+						CharArrayUtils.startsWith(problemBinding.getNameCharArray(), "__builtin_")) { //$NON-NLS-1$
+					return false;  // Ignore an unknown built-in.
+				}
 				return true;
 			}
 			return false;