https://bugs.gentoo.org/874477
--- a/eufind_main.c
+++ b/eufind_main.c
@@ -23,4 +23,5 @@
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include "squid.h"
 #include "sqfuncs.h"
@@ -47,4 +48,14 @@
 -i <integer>   : start nucleotide numbering at <integer> (def=1)\n\n";
 
+int GetBbox(float*, int*, char*, int, int, int);
+int GetBestABox(TRNA_TYPE*, char*, char*, int, int, int, int, int);
+int GetBestTrxTerm(TRNA_TYPE*, char*, int, float);
+int GetSecABox(TRNA_TYPE*, char*);
+void Get_tRNA_stats(TRNA_TYPE*, char*, int, int);
+int Init_tRNA(TRNA_TYPE*);
+int IntEncodeSeq(char*, char*, int);
+void Save_tRNA(TRNA_TYPE*, SQINFO*, char*, int, int, long int);
+int tRNAOverlap(TRNA_TYPE*, TRNA_TYPE*, int);
+
 int
 main (int argc, char **argv)
--- a/scan_main.c
+++ b/scan_main.c
@@ -8,4 +8,5 @@
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <time.h>
 #include <math.h>
--- a/score_main.c
+++ b/score_main.c
@@ -10,4 +10,5 @@
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <time.h>
 #include <math.h>
--- a/trnascan.c
+++ b/trnascan.c
@@ -69,4 +69,5 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <ctype.h>
 
@@ -333,5 +334,5 @@
 	    );
 
-main(int argc, char **argv)
+int main(int argc, char **argv)
 {
   /* pointers to the different files fpi=input file, fpo=output file, 
@@ -1419,5 +1420,5 @@
 /* Calls to this function eliminated for efficiency  T. Lowe  11/95  */
 
-myindex (char *s, char *t)
+int myindex (char *s, char *t)
 {
 int i, j, k;