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diff -Naur a/include/cgmtek.h b/include/cgmtek.h
--- a/include/cgmtek.h 1993-08-10 04:10:54.000000000 -0400
+++ b/include/cgmtek.h 2017-12-20 00:25:38.734568061 -0500
@@ -187,7 +187,7 @@
};
/* Tektronix colour table variables*/
-static n_coltab = DEF_N_COLTAB;
+static int n_coltab = DEF_N_COLTAB;
static RGBcolour TEKcoltab[MAX_N_COLTAB]; /* The TEK colour table */
static Enum TEKcoluse[MAX_N_COLTAB]; /* The TEK colour flags */
static Int colset_n; /* Number of colour table entries set */
diff -Naur a/src/cgmlib.c b/src/cgmlib.c
--- a/src/cgmlib.c 1993-08-10 04:10:34.000000000 -0400
+++ b/src/cgmlib.c 2017-12-20 00:33:41.535568880 -0500
@@ -38,6 +38,12 @@
#define CGMLIB_C
#include "cgmlib.h"
+extern void CGMOhpgl(FILE *, Code, Long*, Float*, char* );
+
+#ifdef TEK4200
+ extern void CGMOtek( FILE*, Code, long *, float *, char * );
+#endif
+
/* Driver Routines */
#ifdef PROTO
diff -Naur a/src/cgmmain.c b/src/cgmmain.c
--- a/src/cgmmain.c 1995-06-13 11:32:22.000000000 -0400
+++ b/src/cgmmain.c 2017-12-20 00:23:32.606567847 -0500
@@ -280,6 +280,7 @@
#define OUTMESS (void) fprintf( (FILE *) cgmerr,
/******************************************************** main *********/
+int
#ifdef PROTO
main ( int argc, char **argv)
#else
diff -Naur a/src/cgmoxw.c b/src/cgmoxw.c
--- a/src/cgmoxw.c 1994-04-15 09:30:07.000000000 -0400
+++ b/src/cgmoxw.c 2017-12-20 00:24:37.448567957 -0500
@@ -111,6 +111,8 @@
*/
+#include <unistd.h>
+
#define CGMOXW_C
#include "cgmout.h"
diff -Naur a/src/cgmtrap.c b/src/cgmtrap.c
--- a/src/cgmtrap.c 1995-06-13 11:33:02.000000000 -0400
+++ b/src/cgmtrap.c 2017-12-20 00:27:03.439568205 -0500
@@ -45,6 +45,7 @@
#include "cgmelem.h"
#include "cgmpar.h"
#include "cgmpts.h"
+#include "cgmgraph.h"
/* Fixed Limit to the number trapezoids (protect CPU from bug) */
#define MAXTRAPS 100000
diff -Naur a/src/genbez.c b/src/genbez.c
--- a/src/genbez.c 1995-06-16 03:26:44.000000000 -0400
+++ b/src/genbez.c 2017-12-20 00:22:46.548567769 -0500
@@ -37,7 +37,7 @@
BezDir Dir;
BezFont Bfont;
-main()
+int main(int argc, char **argv)
{
FILE *generator, *directory;
char *dirname, *genname;
diff -Naur a/src/genher.c b/src/genher.c
--- a/src/genher.c 1995-06-16 03:26:48.000000000 -0400
+++ b/src/genher.c 2017-12-20 00:22:56.659567786 -0500
@@ -51,7 +51,7 @@
static char *func = "genher";
Logical cgmerrcount=FALSE, cgmquiet=FALSE;
-main()
+int main(int argc, char **argv)
{
int last, code, i;
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