diff --git a/h/con_float b/h/con_float
index 8f8eeb8ad..ef31a2807 100644
--- a/h/con_float
+++ b/h/con_float
@@ -288,7 +288,10 @@ void con_float(void)
 	fprintf(codefile, "!float %s sz %d\n", str, (int)argval);
 	if (rval == 2)
 	{
-		fprintf(stderr, "Warning: overflow in floating point constant %s\n", str);
+		/* If this is enabled, it causes huge amounts of build system spam, so
+		 * I've silenced it. dtrg 2022-08-01 */
+
+		/* fprintf(stderr, "Warning: overflow in floating point constant %s\n", str);*/
 	}
 	fprintf(codefile, ".data1 0%o", buf[0] & 0377);
 	for (i = 1; i < (int)argval; i++)
diff --git a/lang/cem/libcc.ansi/headers/time.h b/lang/cem/libcc.ansi/headers/time.h
index 088a0b0d1..582151fd1 100644
--- a/lang/cem/libcc.ansi/headers/time.h
+++ b/lang/cem/libcc.ansi/headers/time.h
@@ -37,6 +37,7 @@ extern struct tm* localtime(const time_t *_timer);
 extern size_t strftime(char *_s, size_t _maxsize,
 			const char *_format,
 			const struct tm *_timeptr);
+extern void tzset(void);
 
 /* Extensions not in the standard */
 
diff --git a/lang/cem/libcc/headers/time.h b/lang/cem/libcc/headers/time.h
index 89a94e055..0423f48dd 100644
--- a/lang/cem/libcc/headers/time.h
+++ b/lang/cem/libcc/headers/time.h
@@ -23,5 +23,6 @@ extern struct tm *gmtime();
 extern struct tm *localtime();
 extern char *asctime();
 extern char *ctime();
+extern void tzset(void);
 
 #endif /* _TIME_H */
diff --git a/mach/i386/ncg/mach.c b/mach/i386/ncg/mach.c
index 008d683cf..4e3dfabe6 100644
--- a/mach/i386/ncg/mach.c
+++ b/mach/i386/ncg/mach.c
@@ -93,8 +93,7 @@ long di_off;
 int firstreg;
 
 int
-regscore(off, size, typ, score, totyp)
-	long off;
+regscore(long off, int size, int typ, int score, int totyp)
 {
 	if (size != 4) return -1;
 	score -= 1;
@@ -137,9 +136,7 @@ f_regsave()
 }
 
 void
-regsave(regstr, off, size)
-	const char *regstr;
-	long off;
+regsave(const char* regstr, long off, int size)
 {
 	if (strcmp(regstr, "esi") == 0) {
 		if (! firstreg) firstreg = -1;
diff --git a/mach/i86/ncg/mach.c b/mach/i86/ncg/mach.c
index 31d1926ea..14e10be12 100644
--- a/mach/i86/ncg/mach.c
+++ b/mach/i86/ncg/mach.c
@@ -83,8 +83,7 @@ long di_off;
 int firstreg;
 
 int
-regscore(off, size, typ, score, totyp)
-	long off;
+regscore(long off, int size, int typ, int score, int totyp)
 {
 	if (size != 2) return -1;
 	score -= 1;
@@ -133,9 +132,7 @@ f_regsave()
 }
 
 void
-regsave(regstr, off, size)
-	const char *regstr;
-	long off;
+regsave(const char* regstr, long off, int size)
 {
 	if (strcmp(regstr, "si") == 0) {
 		if (! firstreg) firstreg = -1;
diff --git a/mach/m68020/libem/trpstr.c b/mach/m68020/libem/trpstr.c
index 58fc397b0..8c1c962b6 100644
--- a/mach/m68020/libem/trpstr.c
+++ b/mach/m68020/libem/trpstr.c
@@ -1,7 +1,6 @@
 #include <em_abs.h>
 
-char *
-_trpstr(d)
+char* _trpstr(int d)
 {
 	switch(d)
 	{
diff --git a/mach/m68020/ncg/mach.c b/mach/m68020/ncg/mach.c
index b86a06bbd..480adf8e1 100644
--- a/mach/m68020/ncg/mach.c
+++ b/mach/m68020/ncg/mach.c
@@ -60,8 +60,7 @@ con_mult(word sz) {
 #include <con_float>
 
 int
-regscore(off,size,typ,score,totyp)
-	long off;
+regscore(long off, int size, int typ, int score, int totyp)
 {
 	if (score == 0) return -1;
 	switch(typ) {
@@ -183,9 +182,7 @@ f_regsave()
 }
 
 void
-regsave(s,off,size)
-	const char *s;
-	long off;
+regsave(const char* s, long off, int size)
 {
 	assert (regnr < 9);
 	regsav[regnr].rs_reg = s;
diff --git a/mach/pdp/cv/cv.c b/mach/pdp/cv/cv.c
index 455469a6b..429abb77e 100644
--- a/mach/pdp/cv/cv.c
+++ b/mach/pdp/cv/cv.c
@@ -11,6 +11,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <unistd.h>
 #include <sys/stat.h>
 
@@ -53,10 +54,10 @@ int	outputfile_created;
 FILE	*output;
 int	rom_in_text;
 
-static cv_int2();
-static fatal();
-static emits();
-static emit_symtab();
+static void cv_int2(int n);
+static void fatal(const char* s, ...);
+static void emits(struct outsect*);
+static void emit_symtab(void);
 
 char *program ;
 
@@ -71,9 +72,7 @@ char flag ;
 #define LSECT	BSSSG+1
 #define NSECT	LSECT+1
 
-main(argc, argv)
-	int	argc;
-	char	*argv[];
+int main(int argc, char* argv[])
 {
 	register struct exec *e = &exec;
 
@@ -189,7 +188,7 @@ main(argc, argv)
 	return 0;
 }
 
-cv_int2(n)
+void cv_int2(int n)
 {
 	putc(n, output);
 	putc((n>>8), output);
@@ -209,7 +208,7 @@ cv_long(l)
 /*
  * Transfer the emitted byted from one file to another.
  */
-emits(section) struct outsect *section ; {
+void emits(struct outsect* section) {
 	register long	n ;
 	register int	blk;
 	char		buffer[BUFSIZ];
@@ -234,7 +233,7 @@ emits(section) struct outsect *section ; {
 	}
 }
 
-emit_symtab()
+void emit_symtab(void)
 {
 	struct outname ACK_name;  /* symbol table entry in ACK format */
 	struct nlist PDP_name;	  /* symbol table entry in PDP V7 format */
@@ -303,17 +302,21 @@ emit_symtab()
 }
 
 /* VARARGS1 */
-fatal(s, a1, a2)
-	char	*s;
+void fatal(const char* s, ...)
 {
+	va_list ap;
+
 	fprintf(stderr,"%s: ",program) ;
-	fprintf(stderr, s, a1, a2);
+	va_start(ap, s);
+	vfprintf(stderr, s, ap);
+	va_end(ap);
+
 	if (outputfile_created)
 		unlink(output_file);
 	exit(1);
 }
 
-rd_fatal()
+void rd_fatal(void)
 {
 	fatal("read error\n");
 }
diff --git a/mach/proto/cg/salloc.c b/mach/proto/cg/salloc.c
index 73d081650..935594872 100644
--- a/mach/proto/cg/salloc.c
+++ b/mach/proto/cg/salloc.c
@@ -88,8 +88,11 @@ char *salloc(int size)
 	return(p);
 }
 
-int compar(char **p1, char **p2)
+int compar(const void* pp1, const void* pp2)
 {
+	const char **p1 = (const char**) pp1;
+	const char **p2 = (const char**) pp2;
+
 	assert(*p1 != *p2);
 	if (*p1 < *p2)
 		return(-1);
diff --git a/mach/proto/cg/salloc.h b/mach/proto/cg/salloc.h
index 85d0cca60..7fd7f5969 100644
--- a/mach/proto/cg/salloc.h
+++ b/mach/proto/cg/salloc.h
@@ -10,11 +10,11 @@
 
 #include "types.h"
 
-string myalloc(int size);
-void myfree(void* p);
-void popstr(int nnstab);
-char *salloc(int size);
-int compar(char **p1, char **p2);
-void garbage_collect(void);
+extern string myalloc(int size);
+extern void myfree(void* p);
+extern void popstr(int nnstab);
+extern char *salloc(int size);
+extern int compar(const void* pp1, const void* pp2);
+extern void garbage_collect(void);
 
 #endif /* SALLOC_H_ */
diff --git a/mach/proto/ncg/label.c b/mach/proto/ncg/label.c
index bb7fdad20..21eb6b6e2 100644
--- a/mach/proto/ncg/label.c
+++ b/mach/proto/ncg/label.c
@@ -6,7 +6,7 @@
 
 static label_p label_list = (label_p)0;
 
-void add_label(num, height, flth)
+void add_label(int num, int height, int flth)
 {
 	label_p lbl = (label_p)0;
 
diff --git a/modules/src/data/array.c b/modules/src/data/array.c
index 2847bbdd4..40402ff20 100644
--- a/modules/src/data/array.c
+++ b/modules/src/data/array.c
@@ -12,7 +12,7 @@ static void extend(struct array* array)
 		struct array* newarray = realloc(array->item, newmax * sizeof(*newarray));
 
 		array->max = newmax;
-		array->item = newarray;
+		array->item = (void**) newarray;
 	}
 }
 
diff --git a/modules/src/data/smap.c b/modules/src/data/smap.c
index 45e25ebbf..35e594997 100644
--- a/modules/src/data/smap.c
+++ b/modules/src/data/smap.c
@@ -5,7 +5,7 @@
 
 #define INCR_SIZE	8
 
-static void append(void* mapp, char* key, void* value)
+static void append(void* mapp, const char* key, void* value)
 {
     struct smap* map = mapp;
     struct smap_node* node;
@@ -26,7 +26,7 @@ static void append(void* mapp, char* key, void* value)
 }
 
 
-void smap_put(struct smap *mapp, char* key, void* value)
+void smap_put(struct smap *mapp, const char* key, void* value)
 {
     struct smap* map = mapp;
     int i;
@@ -71,7 +71,7 @@ void smap_free(struct smap *mapp, int free_key, int free_value)
 	free(mapp->item);
 }
 
-void smap_add(struct smap *mapp, char* key, void* value)
+void smap_add(struct smap *mapp, const char* key, void* value)
 {
     struct smap* map = mapp;
     int i;
diff --git a/modules/src/data/smap.h b/modules/src/data/smap.h
index f01b38010..184c2b176 100644
--- a/modules/src/data/smap.h
+++ b/modules/src/data/smap.h
@@ -36,11 +36,11 @@ extern void smap_init(struct smap *mapp);
  *  it does not already exist, otherwise replaces the
  *  value `value` associated with the existing `key`.
  */
-extern void smap_put(struct smap *mapp, char* key, void* value);
+extern void smap_put(struct smap *mapp, const char* key, void* value);
 /** Adds a new item in a string map only if `key` does
  *  not already exist in the string map.
  */
-extern void smap_add(struct smap *mapp, char* key, void* value);
+extern void smap_add(struct smap *mapp, const char* key, void* value);
 /** Returns the value associated with the specified `key`, returns
  *  NULL if `key` is not present in the string map.
  *
diff --git a/modules/src/data/stringlist.c b/modules/src/data/stringlist.c
index 74d73b331..39f125697 100644
--- a/modules/src/data/stringlist.c
+++ b/modules/src/data/stringlist.c
@@ -69,7 +69,7 @@ char* stringlist_get(struct stringlist *list, int index)
 		i++;
 
 	}
-	return i;
+	return NULL;
 
 }
 
diff --git a/modules/src/data/stringlist.h b/modules/src/data/stringlist.h
index 3d9b0c4c1..b3c6ae8e6 100644
--- a/modules/src/data/stringlist.h
+++ b/modules/src/data/stringlist.h
@@ -3,7 +3,7 @@
 
 struct stringfragment
 {
-	const char* data;
+	char* data;
 	struct stringfragment* next;
 };
 
diff --git a/plat/cpm/libsys/fcb.c b/plat/cpm/libsys/fcb.c
index 96705c467..e64f92f35 100644
--- a/plat/cpm/libsys/fcb.c
+++ b/plat/cpm/libsys/fcb.c
@@ -37,7 +37,7 @@ uint8_t cpm_parse_filename(FCB* fcb, const char* filename)
             c = *filename++;
             if (isdigit(c))
             {
-                user = strtol(filename-1, &filename, 10);
+                user = strtol(filename-1, (char**) &filename, 10);
                 c = *filename++;
             }
             c = toupper(c);
diff --git a/plat/em/include/sgtty.h b/plat/em/include/sgtty.h
index 547a4ee6d..36af330a9 100644
--- a/plat/em/include/sgtty.h
+++ b/plat/em/include/sgtty.h
@@ -116,4 +116,8 @@ struct tchars {
 #define EXTA    14
 #define EXTB    15
 
+extern int ioctl(int fd, unsigned int request, ...);
+extern int gtty(int fildes, struct sgttyb* argp);
+extern int stty(int fildes, struct sgttyb* argp);
+
 #endif /* _SGTTY_H */
diff --git a/plat/em/libsys/gtty.c b/plat/em/libsys/gtty.c
index 62a82b503..081fb0879 100644
--- a/plat/em/libsys/gtty.c
+++ b/plat/em/libsys/gtty.c
@@ -1,6 +1,6 @@
 /* $Id$ */
 #include <sgtty.h>
-int
-gtty(fildes,argp) int fildes ; struct sgttyb *argp ; {
+
+int gtty(int fildes, struct sgttyb* argp) {
 	return ioctl(fildes,TIOCGETP,argp) ;
 }
diff --git a/plat/em/libsys/isatty.c b/plat/em/libsys/isatty.c
index f0ccbdcf0..fbfacc9ac 100644
--- a/plat/em/libsys/isatty.c
+++ b/plat/em/libsys/isatty.c
@@ -1,5 +1,6 @@
-/* $Id$ */
-isatty(f)
+#include <sgtty.h>
+
+int isatty(int fd)
 {
 	char buf[128];
 	/* not a sgttyb struct; it might not be large enough;
@@ -7,6 +8,6 @@ isatty(f)
 	   where gtty is an ioctl(..., TCGETA, ...)
 	*/
 
-	if (gtty(f, buf) < 0) return 0;
+	if (gtty(fd, (void*) buf) < 0) return 0;
 	return 1;
 }
diff --git a/plat/em/libsys/signal.c b/plat/em/libsys/signal.c
index 50d65c7fd..20d262b3d 100644
--- a/plat/em/libsys/signal.c
+++ b/plat/em/libsys/signal.c
@@ -1,14 +1,14 @@
 /* $Id$ */
 #include <signal.h>
 
-typedef void (*callvec)() ;
+extern void _setsig(int (*)(int));
 
-static callvec vector[16] = {
+static sighandler_t vector[16] = {
       SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL,
       SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL, SIG_DFL
 } ;
 
-static char mapvec[] = {
+static const char mapvec[] = {
 	0,              /* EARRAY */
 	0,              /* ERANGE */
 	0,              /* ESET */
@@ -42,16 +42,17 @@ static char mapvec[] = {
 #define VECBASE 128
 
 static          firsttime       = 1 ;
-static int      catchtrp() ;
-static int      procesig() ;
+extern int      sigtrp(int mapval, int sig) ;
+static int      catchtrp(int trapno) ;
+static int      procesig(int signo) ;
 
-callvec signal(sig,func) int sig ; callvec func ; {
+sighandler_t signal(int sig, sighandler_t func) {
 	register index, i ;
-	callvec  prev ;
+	sighandler_t  prev ;
 
 	index= sig-1 ;
 	if ( index<0 || index>=(sizeof vector/sizeof vector[0]) ) {
-		return (callvec) -1 ;
+		return (sighandler_t) -1 ;
 	}
 	if ( firsttime ) {
 		firsttime= 0 ;
@@ -68,13 +69,13 @@ callvec signal(sig,func) int sig ; callvec func ; {
 		} else {
 			mapval=VECBASE+sig;
 		}
-		if ( sigtrp(mapval,sig)== -1 ) return (callvec) -1;
+		if ( sigtrp(mapval,sig)== -1 ) return (sighandler_t) -1;
 
 	}
 	return prev ;
 }
 
-static int catchtrp(trapno) int trapno ; {
+static int catchtrp(int trapno) {
 	if ( trapno>VECBASE &&
 	     trapno<=VECBASE + (sizeof vector/sizeof vector[0]) ) {
 		return procesig(trapno-VECBASE) ;
@@ -86,9 +87,9 @@ static int catchtrp(trapno) int trapno ; {
 	return 0 ; /* Failed to handle the trap */
 }
 
-static int procesig(sig) int sig ; {
+static int procesig(int sig) {
 	register index ;
-	callvec  trf ;
+	sighandler_t  trf ;
 
 	index= sig-1 ;
 	trf= vector[index] ;
diff --git a/plat/em/libsys/stty.c b/plat/em/libsys/stty.c
index 40a8dabaa..eadd908f7 100644
--- a/plat/em/libsys/stty.c
+++ b/plat/em/libsys/stty.c
@@ -1,6 +1,6 @@
 /* $Id$ */
 #include <sgtty.h>
-int
-stty(fildes,argp) int fildes ; struct sgttyb *argp ; {
+
+int stty(int fildes, struct sgttyb* argp) {
 	return ioctl(fildes,TIOCSETP,argp) ;
 }
diff --git a/plat/em/libsys/tell.c b/plat/em/libsys/tell.c
index 7aafa529f..eb18bc6a0 100644
--- a/plat/em/libsys/tell.c
+++ b/plat/em/libsys/tell.c
@@ -3,9 +3,9 @@
  * return offset in file.
  */
 
-long	lseek();
+long	lseek(int fd, int offset, int whence);
 
-long tell(f)
+long tell(int fd)
 {
-	return(lseek(f, 0L, 1));
+	return(lseek(fd, 0L, 1));
 }
diff --git a/plat/em/libsys/time.c b/plat/em/libsys/time.c
index 1ff8177ac..e47db6a86 100644
--- a/plat/em/libsys/time.c
+++ b/plat/em/libsys/time.c
@@ -1,8 +1,10 @@
 /* $Id$ */
 #include <sys/types.h>
 #include <sys/timeb.h>
-time_t
-time(timpt) time_t *timpt ; {
+
+extern void ftime(struct timeb* buf);
+
+time_t time(time_t* timpt) {
 	struct timeb buf ;
 
 	ftime(&buf) ;
diff --git a/plat/pdpv7/libsys/cleanup.c b/plat/pdpv7/libsys/cleanup.c
index 07d507e3f..3e16568fe 100644
--- a/plat/pdpv7/libsys/cleanup.c
+++ b/plat/pdpv7/libsys/cleanup.c
@@ -1,3 +1,3 @@
-_cleanup()
+void _cleanup(void)
 {
 }
diff --git a/plat/pdpv7/libsys/exit.c b/plat/pdpv7/libsys/exit.c
index afd54b3f7..c29cdaa27 100644
--- a/plat/pdpv7/libsys/exit.c
+++ b/plat/pdpv7/libsys/exit.c
@@ -1,4 +1,7 @@
-exit(n)
+extern void _cleanup(void);
+extern void _exit(int n);
+
+void exit(int n)
 {
 	_cleanup();
 	_exit(n);
diff --git a/plat/pdpv7/libsys/gtty.c b/plat/pdpv7/libsys/gtty.c
index 6e03bd84d..5dd37c23b 100644
--- a/plat/pdpv7/libsys/gtty.c
+++ b/plat/pdpv7/libsys/gtty.c
@@ -1,7 +1,7 @@
-int
-gtty(fildes,argp)
-	int fildes ;
-	char *argp ;
+extern int ioctl(int fd, unsigned int request, ...);
+extern int _ioctl(int fd, int ioc, void* ptr);
+
+int gtty(int fildes, char* argp)
 {
 	return ioctl(fildes,/*TIOCGETP*/(('t'<<8)|8),argp) ;
 }
diff --git a/plat/pdpv7/libsys/isatty.c b/plat/pdpv7/libsys/isatty.c
index 7bf22b914..1e4becdf3 100644
--- a/plat/pdpv7/libsys/isatty.c
+++ b/plat/pdpv7/libsys/isatty.c
@@ -1,3 +1,5 @@
+extern int ioctl(int fd, unsigned int request, ...);
+
 int isatty(int fd)
 {
     unsigned u;
diff --git a/plat/pdpv7/libsys/stty.c b/plat/pdpv7/libsys/stty.c
index a77960853..904d2901e 100644
--- a/plat/pdpv7/libsys/stty.c
+++ b/plat/pdpv7/libsys/stty.c
@@ -1,7 +1,6 @@
-int
-stty(fildes,argp)
-	int fildes ;
-	char *argp;
+extern int _ioctl(int fd, int ioc, void* ptr);
+
+int stty(int fildes, char* argp)
 {
 	return _ioctl(fildes,/*TIOCSETP*/(('t'<<8)|9),argp) ;
 }
diff --git a/util/ass/ass00.h b/util/ass/ass00.h
index 4e397a105..7354b2b1d 100644
--- a/util/ass/ass00.h
+++ b/util/ass/ass00.h
@@ -4,6 +4,7 @@
  */
 #include <stdlib.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <sys/types.h>
 #include "em_spec.h"
 #include "as_spec.h"
diff --git a/util/ass/ass60.c b/util/ass/ass60.c
index e3b814136..0a99b6d18 100644
--- a/util/ass/ass60.c
+++ b/util/ass/ass60.c
@@ -28,7 +28,7 @@ cons_t nicepr(int typ, addr_u *ap)
 	case CONST:
 		return (ap->ad_i);
 	case LOCSYM:
-		return (int_cast ap->ad_lp);
+		return (int_cast (intptr_t)ap->ad_lp);
 	case GLOOFF:
 		return (ap->ad_df.df_gp - mglobs);
 	case GLOSYM:
@@ -135,7 +135,7 @@ void dump(int n)
 				if (lbp->l_defined != EMPTY)
 					printf("    %8d%8d%8d%8d  %-s\n",
 							lbp->l_hinum * LOCLABSIZE + i,
-							int_cast lbp, lbp->l_min, lbp->l_max,
+							int_cast (intptr_t)lbp, lbp->l_min, lbp->l_max,
 							labstr[(unsigned char)lbp->l_defined]);
 			}
 		}
diff --git a/util/cgg/main.c b/util/cgg/main.c
index 12d3b4fd4..7e2460a68 100644
--- a/util/cgg/main.c
+++ b/util/cgg/main.c
@@ -21,6 +21,7 @@ static void initio(void);
 static int eqregclass(int r1, int r2);
 static void compueq(void);
 
+static int want_verbose = 0;
 
 
 char *myalloc(int n)
@@ -297,6 +298,9 @@ int main(int argc, char *argv[])
 				case 'c':
 					cname = &argv[0][2];
 					break;
+				case 'v':
+					want_verbose = 1;
+					break;
 				default:
 					fprintf(stderr, "Bad flag %s\n", argv[0]);
 					break;
@@ -316,9 +320,11 @@ int main(int argc, char *argv[])
 		compueq();
 		hashpatterns();
 		finishio();
-		verbose();
+		if (want_verbose)
+			verbose();
 	}
-	debug();
+	if (want_verbose)
+		debug();
 	exit(nerrors);
 }
 
@@ -777,7 +783,6 @@ static void outregvar(void)
 
 static void verbose(void)
 {
-
 	fprintf(stderr, "Codebytes %d\n", codebytes);
 	fprintf(stderr, "Registers %d(%d)\n", nmachregs, MAXREGS);
 	fprintf(stderr, "Properties %d(%d)\n", nprops, MAXPROPS);
diff --git a/util/ego/ic/ic_lookup.c b/util/ego/ic/ic_lookup.c
index 5e4867d1b..97e70f2d5 100644
--- a/util/ego/ic/ic_lookup.c
+++ b/util/ego/ic/ic_lookup.c
@@ -83,7 +83,7 @@ lab_id instr_lab(short number)
 /*  symlookup */
 
 STATIC unsigned hash(const char *string) {
-	register char *p;
+	register const char *p;
 	register unsigned i,sum;
 
 	for (sum=i=0,p=string;*p;i += 3)
diff --git a/util/ego/share/debug.c b/util/ego/share/debug.c
index 56514d149..a77ec571d 100644
--- a/util/ego/share/debug.c
+++ b/util/ego/share/debug.c
@@ -12,6 +12,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <em_spec.h>
 #include "types.h"
 #include "def.h"
@@ -69,7 +70,7 @@ void OUTVERBOSE(const char *s, int n1, int n2)
 
 void VA(short *a) {
 	if (a == (short *) 0)  error("VA: 0 argument");
-	if ( ((unsigned) a & 01) == 01) {
+	if ( ((intptr_t) a & 01) == 01) {
 		/* MACHINE DEPENDENT TEST */
 		error("VA: odd argument");
 	}
diff --git a/util/int/m_sigtrp.c b/util/int/m_sigtrp.c
index f48f9b0ab..d74e018f0 100644
--- a/util/int/m_sigtrp.c
+++ b/util/int/m_sigtrp.c
@@ -100,7 +100,7 @@ int do_sigtrp(
 	}
 	else if (tn >= 0 && tn <= 252)
 	{/* legal tn */
-		if ((int) signal(sn, HndlEmSig) == -1)
+		if (signal(sn, HndlEmSig) == SIG_ERR)
 		{
 			sig_map[sn] = old_tn;
 			return (-1);
diff --git a/util/int/moncalls.c b/util/int/moncalls.c
index 78b507fe7..d2623f338 100644
--- a/util/int/moncalls.c
+++ b/util/int/moncalls.c
@@ -128,7 +128,7 @@ PRIVATE size buf_cnt[5];		/* Current sizes of the buffers */
 PRIVATE char *buf[5];			/* Pointers to the buffers */
 
 PRIVATE check_buf();
-PRIVATE int savestr();
+PRIVATE int savestr(int n, ptr addr);
 PRIVATE int vec();
 
 void moncall(void)
@@ -702,7 +702,7 @@ void moncall(void)
 #ifdef	SYS_V				/* from system.h */
 		utimbuf.x = actime;
 		utimbuf.y = modtime;
-		if (!savestr(0, dsp1) || utime(buf[0], &utimbuf) == -1) {
+		if (!savestr(0, dsp1) || utime(buf[0], (struct utimbuf*) &utimbuf) == -1) {
 #else	/* SYS_V */
 		utimbuf[0] = actime;
 		utimbuf[1] = modtime;
@@ -1037,9 +1037,7 @@ PRIVATE check_buf(n, sz)
 	}
 }
 
-PRIVATE int savestr(n, addr)
-	int n;
-	ptr addr;
+PRIVATE int savestr(int n, ptr addr)
 {
 	register size len;
 	register char *cp, ch;
diff --git a/util/ncgg/main.c b/util/ncgg/main.c
index 46ddeb051..0d1e05383 100644
--- a/util/ncgg/main.c
+++ b/util/ncgg/main.c
@@ -65,9 +65,11 @@ int main(int argc, char **argv)
 	if (nerrors == 0)
 	{
 		finishio();
-		statistics();
 		if (verbose)
+		{
+			statistics();
 			hallverbose();
+		}
 	}
 	else
 	{
diff --git a/util/topgen/pattern.c b/util/topgen/pattern.c
index 9e84f5059..93ba5459f 100644
--- a/util/topgen/pattern.c
+++ b/util/topgen/pattern.c
@@ -123,7 +123,7 @@ void printpatterns(void) {
 	i++;
     }
     fputs("};\n", genc);
-    fputs("int\ncheck_constraint(patno){\n\tint r;\n\tswitch(patno){\n",genc);
+    fputs("int\ncheck_constraint(int patno){\n\tint r;\n\tswitch(patno){\n",genc);
     p = pattable;
     while (p < current) {
 	if (p->p_constraint) {