https://bugs.gentoo.org/874069
--- a/hydrbond.c
+++ b/hydrbond.c
@@ -293,3 +293,3 @@
   int dc, ac, ccd, cca, cc, hc=0, i;
-  void (*HBOND_Energy)();
+  void (*HBOND_Energy)(float*, float*, float*, float*, float*, COMMAND*, HBOND*);
   BUFFER Text;
--- a/p_atom.c
+++ b/p_atom.c
@@ -11,3 +11,3 @@
   RESIDUE *r;
-  register i;
+  register int i;