Index: ide/Builders/Builders.h
===================================================================
--- ide/Builders/Builders.h	(revisione 15939)
+++ ide/Builders/Builders.h	(copia di lavoro)
@@ -30,6 +30,7 @@
 	void                   OnFinish(Event<>  cb);
 	bool                   Cp(const String& cmd, const String& package, bool& error);
 	bool                   Cd(const String& cmd);
+
 	Vector<String>         CustomStep(const String& path, const String& package, bool& error);
 
 	String                 Includes(const char *sep, const String& package, const Package& pkg);
Index: ide/Builders/CppBuilder.cpp
===================================================================
--- ide/Builders/CppBuilder.cpp	(revisione 15939)
+++ ide/Builders/CppBuilder.cpp	(copia di lavoro)
@@ -245,18 +245,30 @@
 	return out;
 }
 
-void ExtExclude(CParser& p, Index<String>& x)
+static bool CheckImportCondition(CParser &p, Vector<String> const &flag)
 {
+	// no condition == true
+	if(!p.IsChar('('))
+		return true;
+	String s = ReadWhen(p);
+	return MatchWhen(s, flag);
+}
+
+static void ExtExclude(CParser& p, Index<String>& x, Vector<String> const &flag)
+{
+	bool apply = CheckImportCondition(p, flag);
 	Vector<String> e = ReadPatterns(p);
-	Vector<int> remove;
-	for(int i = 0; i < x.GetCount(); i++)
-		for(int j = 0; j < e.GetCount(); j++) {
-			if(PatternMatch(e[j], x[i])) {
-				remove.Add(i);
-				break;
+	if(apply) {
+		Vector<int> remove;
+		for(int i = 0; i < x.GetCount(); i++)
+			for(int j = 0; j < e.GetCount(); j++) {
+				if(PatternMatch(e[j], x[i])) {
+					remove.Add(i);
+					break;
+				}
 			}
-		}
-	x.Remove(remove);
+		x.Remove(remove);
+	}
 }
 
 Vector<String> CppBuilder::CustomStep(const String& pf, const String& package_, bool& error)
@@ -268,6 +280,7 @@
 	if(ext == ".ext") {
 		Vector<String> files;
 		Vector<String> dirs;
+		Vector<String> const &flags = config.GetKeys();
 		sGatherAllExt(files, dirs, GetFileFolder(path), "");
 		
 		Index<String> pkg_files;
@@ -283,43 +296,52 @@
 			CParser p(f);
 			while(!p.IsEof()) {
 				if(p.Id("files")) {
+					bool apply = CheckImportCondition(p, flags);
 					Vector<String> e = ReadPatterns(p);
-					for(int i = 0; i < files.GetCount(); i++)
-						for(int j = 0; j < e.GetCount(); j++) {
-							String f = files[i];
-							if(PatternMatch(e[j], f) && pkg_files.Find(f) < 0)
-								out.FindAdd(f);
-						}
+					if(apply) {
+						for(int i = 0; i < files.GetCount(); i++)
+								for(int j = 0; j < e.GetCount(); j++) {
+								String f = files[i];
+								if(PatternMatch(e[j], f) && pkg_files.Find(f) < 0)
+									out.FindAdd(f);
+							}
+					}
 				}
 				if(p.Id("exclude")) {
-					ExtExclude(p, out);
+					ExtExclude(p, out, flags);
 				}
 				if(p.Id("include_path")) {
+					bool apply = CheckImportCondition(p, flags);
 					Vector<String> e = ReadPatterns(p);
-					for(int j = 0; j < e.GetCount(); j++) {
-						String ee = e[j];
-						if(ee.Find('*') >= 0)
-							for(int i = 0; i < dirs.GetCount(); i++) {
-								String d = dirs[i];
-								if(PatternMatch(e[j], d)) {
-									include_path.FindAdd(d);
+					if(apply) {
+						for(int j = 0; j < e.GetCount(); j++) {
+							String ee = e[j];
+							if(ee.Find('*') >= 0)
+								for(int i = 0; i < dirs.GetCount(); i++) {
+									String d = dirs[i];
+									if(PatternMatch(e[j], d)) {
+										include_path.FindAdd(d);
+									}
 								}
-							}
-						else
-							include_path.Add(ee);
+							else
+								include_path.Add(ee);
+						}
 					}
 				}
 				if(p.Id("exclude_path")) {
-					ExtExclude(p, include_path);
+					ExtExclude(p, include_path, flags);
 				}
 				if(p.Id("includes")) {
+					bool apply = CheckImportCondition(p, flags);
 					Vector<String> e = ReadPatterns(p);
-					for(int i = 0; i < files.GetCount(); i++)
-						for(int j = 0; j < e.GetCount(); j++) {
-							String f = files[i];
-							if(PatternMatch(e[j], f) && pkg_files.Find(f) < 0)
-								include_path.FindAdd(GetFileFolder(f));
-						}
+					if(apply) {
+						for(int i = 0; i < files.GetCount(); i++)
+							for(int j = 0; j < e.GetCount(); j++) {
+								String f = files[i];
+								if(PatternMatch(e[j], f) && pkg_files.Find(f) < 0)
+									include_path.FindAdd(GetFileFolder(f));
+							}
+					}
 				}
 			}
 		}