https://bugs.gentoo.org/870514
--- a/draw.c
+++ b/draw.c
@@ -63,2 +63,3 @@
 
+void
 set_bits(int b)
@@ -70,2 +71,3 @@
 
+void
 set_string(char *s)
--- a/hcalc.h
+++ b/hcalc.h
@@ -37 +37,12 @@
 #define HEIGHT 294
+
+void button(int b, int x, int y);
+void complete_paste(char *s, int n);
+void key(char c);
+void load_pixmaps(void);
+void process_input(void);
+void redraw(void);
+void send_current_display(void);
+void set_bits(int b);
+void set_string(char *s);
+void setup_x(int argc, char **argv);