find target name from source filse

src/main.cc

 	return false;
 }
 
+static std::string findTargetName(
+		const BBParser::Variables &vars,
+		const std::vector<SourceFile> &sources) {
+	auto it = vars.find("target");
+	if (it != vars.end() && it->second.size() != 0) {
+		return it->second[0];
+	}
+
+	for (auto &source: sources) {
+		const std::vector<std::string> *ptr = source.variable("target");
+		if (ptr != nullptr && ptr->size() != 0) {
+			return (*ptr)[0];
+		}
+	}
+
+	return "target";
+}
+
 int main(int argc, char **argv) {
 	logger::LogContext logCtx = logger::init();
 
 		parser.parse(variables);
 	}
 
-	// Find target
-	if (target.size() == 0) {
-		auto it = variables.find("target");
-		if (it == variables.end() || it->second.size() == 0) {
-			target = "target";
-		} else {
-			target = it->second[0];
-		}
-	}
-
 	// Find source dirs
 	std::vector<std::string> sourceDirs;
 	{
 		findSources(".", dir, sources, variables);
 	}
 
+	// Find target name
+	if (target.size() == 0) {
+		target = findTargetName(variables, sources);
+	}
+
 	switch (action) {
 	case Action::BUILD:
 		// TODO: Support more types than BINARY