Print warnings when IUTF8 missing

src/examples/parse.cc

@@ -31,6 +31,7 @@
 #include <wctype.h>
 #include <iostream>
 #include <typeinfo>
+#include <termios.h>
 
 #if HAVE_PTY_H
 #include <pty.h>
@@ -65,10 +66,14 @@ int main( int argc __attribute__((unused)),
 
   child_termios = saved_termios;
 
+#ifdef HAVE_IUTF8
   if ( !(child_termios.c_iflag & IUTF8) ) {
     fprintf( stderr, "Warning: Locale is UTF-8 but termios IUTF8 flag not set. Setting IUTF8 flag.\n" );
     child_termios.c_iflag |= IUTF8;
   }
+#else
+  fprintf( stderr, "Warning: termios IUTF8 flag not defined. Character-erase of multibyte character sequence probably does not work properly on this platform.\n" );
+#endif /* HAVE_IUTF8 */
 
   pid_t child = forkpty( &master, NULL, &child_termios, NULL );