g++ -c ../lib/mtp-libmtp.cpp -o mtp.o -Wall -I../lib `curl-config --cflags` `pkg-config --cflags libmtp` -DHAVE_LIBMTP
../lib/mtp-libmtp.cpp: In member function ‘void Scrobble::mtp_iterate(bool)’:
../lib/mtp-libmtp.cpp:104:30: error: ‘free’ was not declared in this scope

http://bugs.gentoo.org/405667

--- src/lib/mtp-libmtp.cpp
+++ src/lib/mtp-libmtp.cpp
@@ -16,6 +16,7 @@
  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  ***************************************************************************/
 
+#include <cstdlib> /* free */
 #include <iostream>
 #include "libscrobble.h"