--- a/src/draw.c
+++ b/src/draw.c
@@ -34,6 +34,11 @@
 
 char fontname[LARGE_BUF_LENGTH];
 
+long treecolor, namecolor, backcolor, bottomcolor, vrmlskycolornear, vrmlskycolorfar,
+     vrmlgroundcolornear, vrmlgroundcolorfar, vrmlplotcolor;
+
+char afmfile[FNMLNGTH];
+
 /* format of matrix: capheight,  length[32],length[33],..length[256]*/
 
 byte *full_pic ;
--- a/src/draw.h
+++ b/src/draw.h
@@ -52,10 +52,10 @@
   double intensity, x, y, z;
 } vrmllighttype;
 
-long treecolor, namecolor, backcolor, bottomcolor, vrmlskycolornear, vrmlskycolorfar,
+extern long treecolor, namecolor, backcolor, bottomcolor, vrmlskycolornear, vrmlskycolorfar,
      vrmlgroundcolornear, vrmlgroundcolorfar, vrmlplotcolor;
      
-char afmfile[FNMLNGTH];
+extern char afmfile[FNMLNGTH];
 
 double lengthtext(char *, long, char *, fonttype);
 double heighttext(fonttype, char *);
--- a/src/drawtree.c
+++ b/src/drawtree.c
@@ -69,7 +69,7 @@
              uselengths, regular, rotate, empty, rescaled,
              notfirst, improve, nbody, firstscreens, labelavoid;
 boolean     pictbold,pictitalic,pictshadow,pictoutline;
-boolean javarun;
+extern boolean javarun;
 
 striptype stripe;
 plottertype plotter, oldplotter;
--- a/src/phylip.c
+++ b/src/phylip.c
@@ -34,6 +34,8 @@
 
 #include "phylip.h"
 
+boolean javarun;
+
 #ifdef WIN32
 #include <windows.h>
 /* for console code (clear screen, text color settings) */
--- a/src/phylip.h
+++ b/src/phylip.h
@@ -331,7 +331,7 @@
 /* Lower-triangular format. */
 #define MAT_LOWERTRI    (MAT_LOWER | MAT_MACHINE)
 
-boolean javarun;
+extern boolean javarun;
 
 typedef long *steptr;
 typedef long longer[6];
@@ -351,7 +351,6 @@
 extern long spp, words, bits;
 extern boolean ibmpc, ansi, tranvsp;
 extern naym *nayme;                     /* names of species */
-boolean firstplotblock; // for debugging BMP output
 
 #define ebcdic          EBCDIC