Fix compile on older systems with gcc 4.4.x. Signed-off-by: Waldemar Brodkorb diff -Nur gdb-7.10.1.orig//sim/common/sim-base.h gdb-7.10.1/sim/common/sim-base.h --- gdb-7.10.1.orig//sim/common/sim-base.h 2015-05-13 13:03:56.000000000 -0500 +++ gdb-7.10.1/sim/common/sim-base.h 2016-07-08 07:44:17.000000000 -0500 @@ -72,8 +72,6 @@ #define INVALID_INSTRUCTION_ADDRESS ((address_word)0 - 1) #endif -/* TODO: Probably should just delete SIM_CPU. */ -typedef struct _sim_cpu SIM_CPU; typedef struct _sim_cpu sim_cpu; #include "sim-module.h"