redirect std::cerr output to ~/.ncmpcpp/error.log file

src/ncmpcpp.cpp

@@ -22,7 +22,7 @@
 #include <csignal>
 
 #include <algorithm>
-#include <iostream>
+#include <fstream>
 #include <map>
 
 #include "mpdpp.h"
@@ -352,6 +352,10 @@ int main(int argc, char *argv[])
 	
 	signal(SIGPIPE, SIG_IGN);
 	
+	// redirect std::cerr output to ~/.ncmpcpp/error.log file
+	std::ofstream errorlog((config_dir + "error.log").c_str(), std::ios::app);
+	std::cerr.rdbuf(errorlog.rdbuf());
+	
 #	ifdef HAVE_CURL_CURL_H
 	pthread_attr_t attr_detached;
 	pthread_attr_init(&attr_detached);
@@ -3602,6 +3606,7 @@ int main(int argc, char *argv[])
 		
 		// key mapping end
 	}
+	errorlog.close();
 	Mpd->Disconnect();
 	DestroyScreen();
 	return 0;