Index: mplex/mplex.cpp
--- mplex/mplex.cpp.orig
+++ mplex/mplex.cpp
@@ -59,7 +59,7 @@
 
 using std::auto_ptr;
 
-extern int read_from_buffer ( unsigned char, unsigned char *, int, int );
+extern "C" int read_from_buffer ( unsigned char, unsigned char *, int, int );
 
 
 /*************************************************************************
@@ -324,6 +324,7 @@ void CmdLineMultiplexJob::InputStreamsFromCmdLine(int 
 }
 
 
+extern "C" int run_mplex(int, int *, int);
 
 int run_mplex( int stream_count, int *stream_list, int av_delay ) {
    CmdLineMultiplexJob job( stream_count, stream_list, av_delay );