diff --git a/lang/pc/libpc/catch.c b/lang/pc/libpc/catch.c
index 311936bb7..616a18d59 100644
--- a/lang/pc/libpc/catch.c
+++ b/lang/pc/libpc/catch.c
@@ -88,10 +88,8 @@ extern char		**_penvp;
 
 extern char		*_hol0();
 extern			_trp();
-extern			exit();
-extern int		open();
-extern int		read();
-extern int		write();
+extern			_exit();
+extern int		_write();
 
 _catch(erno) unsigned erno; {
 	register struct errm *ep = &errors[0];
@@ -146,10 +144,10 @@ _catch(erno) unsigned erno; {
 		p = q;
 		while (*p)
 			p++;
-		if (write(2,q,p-q) < 0)
+		if (_write(2,q,p-q) < 0)
 			;
 	}
-	exit(erno);
+	_exit(erno);
 error:
 	_trp(erno);
 }
diff --git a/lang/pc/libpc/clock.c b/lang/pc/libpc/clock.c
index d790ddd10..f5847696a 100644
--- a/lang/pc/libpc/clock.c
+++ b/lang/pc/libpc/clock.c
@@ -20,7 +20,7 @@
 
 /* function clock:integer; extern; */
 
-extern int	times();
+extern int	_times();
 
 struct tbuf {
 	long	utime;
@@ -36,7 +36,7 @@ struct tbuf {
 int clock() {
 	struct tbuf t;
 
-	times(&t);
+	_times(&t);
 	return( (int)(t.utime + t.stime) &
 #if EM_WSIZE <= 2
 	077777
diff --git a/lang/pc/libpc/cls.c b/lang/pc/libpc/cls.c
index 2234e1988..f891a3658 100644
--- a/lang/pc/libpc/cls.c
+++ b/lang/pc/libpc/cls.c
@@ -25,7 +25,7 @@ extern struct file	*_curfil;
 extern			_trp();
 extern			_flush();
 extern			_outcpt();
-extern int		close();
+extern int		_close();
 
 _xcls(f) struct file *f; {
 
@@ -61,7 +61,7 @@ _cls(f) struct file *f; {
 		return;
 #endif
 	_xcls(f);
-	if (close(f->ufd) != 0)
+	if (_close(f->ufd) != 0)
 		_trp(ECLOSE);
 	f->flags = 0;
 }
diff --git a/lang/pc/libpc/hlt.c b/lang/pc/libpc/hlt.c
index 99cf68cd3..0c04c592e 100644
--- a/lang/pc/libpc/hlt.c
+++ b/lang/pc/libpc/hlt.c
@@ -23,7 +23,7 @@
 extern struct file	**_extfl;
 extern int		_extflc;
 extern			_cls();
-extern			exit();
+extern			_exit();
 
 _hlt(ecode) int ecode; {
 	int i;
@@ -31,5 +31,5 @@ _hlt(ecode) int ecode; {
 	for (i = 0; i < _extflc; i++)
 		if (_extfl[i] != (struct file *) 0)
 			_cls(_extfl[i]);
-	exit(ecode);
+	_exit(ecode);
 }
diff --git a/lang/pc/libpc/incpt.c b/lang/pc/libpc/incpt.c
index 9ba7495b8..5818a8604 100644
--- a/lang/pc/libpc/incpt.c
+++ b/lang/pc/libpc/incpt.c
@@ -25,7 +25,7 @@
 
 extern int	errno;
 extern		_trp();
-extern int	read();
+extern int	_read();
 
 _incpt(f) struct file *f; {
 
@@ -40,7 +40,7 @@ _incpt(f) struct file *f; {
 	if (f->count == 0) {
 		f->ptr = f->bufadr;
 		for(;;) {
-			f->count=read(f->ufd,f->bufadr,f->buflen);
+			f->count=_read(f->ufd,f->bufadr,f->buflen);
 			if ( f->count<0 ) {
 				if (errno != EINTR) _trp(EREAD) ;
 				continue ;
diff --git a/lang/pc/libpc/ini.c b/lang/pc/libpc/ini.c
index a6211634c..774846493 100644
--- a/lang/pc/libpc/ini.c
+++ b/lang/pc/libpc/ini.c
@@ -24,7 +24,7 @@
 extern          (*_sig())();
 extern          _catch();
 #ifndef CPM
-extern int      gtty();
+extern int      _gtty();
 #endif
 
 struct file     **_extfl;
@@ -34,6 +34,7 @@ struct file     *_curfil;       /* points to file struct in case of errors */
 int             _pargc;
 char            **_pargv;
 char            **_penvp;
+int		_fp_hook = 1;	/* This is for Minix, but does not harm others */
 
 _ini(args,c,p,mainlb) char *args,*mainlb; int c; struct file **p; {
 	struct file *f;
@@ -65,7 +66,7 @@ _ini(args,c,p,mainlb) char *args,*mainlb; int c; struct file **p; {
 #ifdef CPM
 		f->count = 1;
 #else
-		f->count = (gtty(1,buf) >= 0 ? 1 : PC_BUFLEN);
+		f->count = (_gtty(1,buf) >= 0 ? 1 : PC_BUFLEN);
 #endif
 		f->buflen = f->count;
 	}
diff --git a/lang/pc/libpc/opn.c b/lang/pc/libpc/opn.c
index 3cb933ed3..40aebee71 100644
--- a/lang/pc/libpc/opn.c
+++ b/lang/pc/libpc/opn.c
@@ -31,32 +31,32 @@ extern char		**_penvp;
 extern			_cls();
 extern			_xcls();
 extern			_trp();
-extern int		getpid();
-extern int		creat();
-extern int		open();
-extern int		close();
-extern int		unlink();
-extern long		lseek();
+extern int		_getpid();
+extern int		_creat();
+extern int		_open();
+extern int		_close();
+extern int		_unlink();
+extern long		_lseek();
 
 static int tmpfil() {
 	int i; char *p,*q;
 
-	i = getpid();
+	i = _getpid();
 	p = "/usr/tmp/plf.xxxxx";
 	q = p + 13;
 	do
 		*q++ = (i & 07) + '0';
 	while (i >>= 3);
 	*q = '\0';
-	if ((i = creat(p,0644)) < 0)
-		if ((i = creat(p += 4,0644)) < 0)
-			if ((i = creat(p += 5,0644)) < 0)
+	if ((i = _creat(p,0644)) < 0)
+		if ((i = _creat(p += 4,0644)) < 0)
+			if ((i = _creat(p += 5,0644)) < 0)
 				goto error;
-	if (close(i) != 0)
+	if (_close(i) != 0)
 		goto error;
-	if ((i = open(p,2)) < 0)
+	if ((i = _open(p,2)) < 0)
 		goto error;
-	if (unlink(p) != 0)
+	if (_unlink(p) != 0)
 error:		_trp(EREWR);
 	return(i);
 }
@@ -76,7 +76,7 @@ static int initfl(descr,sz,f) int descr; int sz; struct file *f; {
 		f->fname = "LOCAL";
 		if ((descr & WRBIT) == 0 && (f->flags & 0377) == MAGIC) {
 			_xcls(f);
-			if (lseek(f->ufd,(long)0,0) == -1)
+			if (_lseek(f->ufd,(long)0,0) == -1)
 				_trp(ERESET);
 		} else {
 			_cls(f);
@@ -90,10 +90,10 @@ static int initfl(descr,sz,f) int descr; int sz; struct file *f; {
 		f->fname = _pargv[i];
 		_cls(f);
 		if ((descr & WRBIT) == 0) {
-			if ((f->ufd = open(f->fname,0)) < 0)
+			if ((f->ufd = _open(f->fname,0)) < 0)
 				_trp(ERESET);
 		} else {
-			if ((f->ufd = creat(f->fname,0644)) < 0)
+			if ((f->ufd = _creat(f->fname,0644)) < 0)
 				_trp(EREWR);
 		}
 	}
diff --git a/lang/pc/libpc/outcpt.c b/lang/pc/libpc/outcpt.c
index 8717317b3..98b02e5b3 100644
--- a/lang/pc/libpc/outcpt.c
+++ b/lang/pc/libpc/outcpt.c
@@ -25,7 +25,7 @@
 
 extern int	errno;
 extern		_trp();
-extern int	write();
+extern int	_write();
 
 _flush(f) struct file *f; {
 	int i,n;
@@ -35,7 +35,7 @@ _flush(f) struct file *f; {
 	if (n <= 0)
 		return;
 	f->count = f->buflen;
-	if ((i = write(f->ufd,f->bufadr,n)) < 0 && errno == EINTR)
+	if ((i = _write(f->ufd,f->bufadr,n)) < 0 && errno == EINTR)
 		return;
 	if (i != n)
 		_trp(EWRITE);
diff --git a/lang/pc/libpc/pcreat.c b/lang/pc/libpc/pcreat.c
index 7e3935a7f..f1190b922 100644
--- a/lang/pc/libpc/pcreat.c
+++ b/lang/pc/libpc/pcreat.c
@@ -23,7 +23,7 @@
 
 extern		_cls();
 extern		_trp();
-extern int	creat();
+extern int	_creat();
 
 /* procedure pcreat(var f:text; s:string); */
 
@@ -36,6 +36,6 @@ pcreat(f,s) struct file *f; char *s; {
 	f->size = 1;
 	f->count = PC_BUFLEN;
 	f->buflen = PC_BUFLEN;
-	if ((f->ufd = creat(s,0644)) < 0)
+	if ((f->ufd = _creat(s,0644)) < 0)
 		_trp(EREWR);
 }
diff --git a/lang/pc/libpc/popen.c b/lang/pc/libpc/popen.c
index 7baac96ce..b542c7ee3 100644
--- a/lang/pc/libpc/popen.c
+++ b/lang/pc/libpc/popen.c
@@ -23,7 +23,7 @@
 
 extern		_cls();
 extern		_trp();
-extern int	open();
+extern int	_open();
 
 /* procedure popen(var f:text; s:string); */
 
@@ -36,6 +36,6 @@ popen(f,s) struct file *f; char *s; {
 	f->size = 1;
 	f->count = 0;
 	f->buflen = PC_BUFLEN;
-	if ((f->ufd = open(s,0)) < 0)
+	if ((f->ufd = _open(s,0)) < 0)
 		_trp(ERESET);
 }
diff --git a/lang/pc/libpc/rcka.c b/lang/pc/libpc/rcka.c
index d384013a9..b08b6b0be 100644
--- a/lang/pc/libpc/rcka.c
+++ b/lang/pc/libpc/rcka.c
@@ -8,7 +8,7 @@
 
 #include	<em_abs.h>
 
-extern trp();
+extern _trp();
 
 struct array_descr	{
 		int		lbound;
@@ -21,5 +21,5 @@ struct array_descr *descr;
 {
 	if( index < descr->lbound ||
 	    index > (int) descr->n_elts_min_one + descr->lbound )
-		_trp(ERANGE);
+		_trp(EARRAY);
 }
diff --git a/lang/pc/libpc/uread.c b/lang/pc/libpc/uread.c
index 5e504eb25..ce700470e 100644
--- a/lang/pc/libpc/uread.c
+++ b/lang/pc/libpc/uread.c
@@ -18,8 +18,8 @@
 
 /* function uread(fd:integer; var b:buf; n:integer):integer; */
 
-extern int	read();
+extern int	_read();
 
 int uread(fd,b,n) char *b; int fd,n; {
-	return(read(fd,b,n));
+	return(_read(fd,b,n));
 }
diff --git a/lang/pc/libpc/uwrite.c b/lang/pc/libpc/uwrite.c
index 7cf7d557a..1a1a20c0a 100644
--- a/lang/pc/libpc/uwrite.c
+++ b/lang/pc/libpc/uwrite.c
@@ -18,8 +18,8 @@
 
 /* function uwrite(fd:integer; var b:buf; n:integer):integer; */
 
-extern int	write();
+extern int	_write();
 
 int uwrite(fd,b,n) char *b; int fd,n; {
-	return(write(fd,b,n));
+	return(_write(fd,b,n));
 }