looks like this happened in gdb/Makefile.in version 1.39 maybe following is the change which caused it in 1.38 it was SER_HARDWIRE = @SER_HARDWIRE@ in 1.39 it is SER_HARDWIRE = ser-unix.o ser-pipe.o i would like to see ser-tcp.o back in Makefile.in THX niraj