This is never set anywhere, so it's always empty. Scrub it.
SMP_CFLAGS = @sim_smp@
XOR_ENDIAN_CFLAGS = @sim_xor_endian@
BITSIZE_CFLAGS = @sim_bitsize@
-HOSTBITSIZE_CFLAGS = @sim_hostbitsize@
TIMEBASE_CFLAGS = @sim_timebase@
FLOAT_CFLAGS = @sim_float@
MONITOR_CFLAGS = @sim_monitor@
$(SMP_CFLAGS) \
$(XOR_ENDIAN_CFLAGS) \
$(BITSIZE_CFLAGS) \
- $(HOSTBITSIZE_CFLAGS) \
$(TIMEBASE_CFLAGS) \
$(FLOAT_CFLAGS) \
$(MONITOR_CFLAGS) \
sim_monitor
sim_float
sim_timebase
-sim_hostbitsize
sim_bitsize
sim_igen_smp
sim_smp
-
ac_config_files="$ac_config_files Makefile"
AC_SUBST(sim_smp)
AC_SUBST(sim_igen_smp)
AC_SUBST(sim_bitsize)
-AC_SUBST(sim_hostbitsize)
AC_SUBST(sim_timebase)
AC_SUBST(sim_float)
AC_SUBST(sim_monitor)