Cleaner MKSYSDEBUG option

kernel/Makefile

@@ -70,6 +70,7 @@ SRCS+= 	breakpoints.c debugreg.S
 # Extra debugging routines
 .if ${USE_SYSDEBUG} != "no"
 SRCS+= 	debug.c
+CPPFLAGS+= -DUSE_SYSDEBUG
 .endif
 
 # These come last, so the profiling buffer is at the end of the data segment

kernel/arch/i386/arch_system.c

@@ -395,7 +395,7 @@ PUBLIC void arch_init(void)
 #endif
 }
 
-#if DEBUG_SERIAL
+#ifdef DEBUG_SERIAL
 PUBLIC void ser_putc(char c)
 {
         int i;

kernel/clock.c

@@ -140,7 +140,7 @@ PUBLIC int timer_int_handler(void)
 				TMR_NEVER : clock_timers->tmr_exp_time;
 		}
 
-#if DEBUG_SERIAL
+#ifdef DEBUG_SERIAL
 		if (do_serial_debug)
 			do_ser_debug();
 #endif

kernel/debug.h

@@ -50,7 +50,7 @@
 /* DEBUG_IPCSTATS collects information on who sends messages to whom. */
 #define DEBUG_IPCSTATS			0
 
-#if USE_SMALL
+#if !USE_SYSDEBUG
 #undef DEBUG_SERIAL
 #undef DEBUG_ENABLE_IPC_WARNINGS
 #endif

kernel/start.c

@@ -84,7 +84,7 @@ PUBLIC void cstart(
   if(!value || system_hz < 2 || system_hz > 50000)	/* sanity check */
 	system_hz = DEFAULT_HZ;
 
-#if DEBUG_SERIAL
+#ifdef DEBUG_SERIAL
   /* Intitialize serial debugging */
   value = env_get(SERVARNAME);
   if(value && atoi(value) == 0) {

kernel/utility.c

@@ -50,7 +50,7 @@ int c;					/* character to append */
  * to the output driver if an END_OF_KMESS is encountered. 
  */
   if (c != END_OF_KMESS) {
-#if DEBUG_SERIAL
+#ifdef DEBUG_SERIAL
       if (do_serial_debug) {
 	if(c == '\n')
       		ser_putc('\r');

share/mk/sys.mk

@@ -247,5 +247,5 @@ NBSD_LIBC=	yes
 
 .if ${COMPILER_TYPE} == "gnu" && defined(MKSMALL) && ${MKSMALL} == "yes"
 DBG=	-Os
-CFLAGS+= -DNDEBUG=1 -DUSE_SMALL=1
+CFLAGS+= -DNDEBUG
 .endif