diff --git a/gcc/gensupport.c b/gcc/gensupport.c
index 0f19bd7066466b3ccdf06d0cacb40ead55cb8a9c..e1ca06dbc1ec1463c990ec28da407eb8fa07529c 100644
--- a/gcc/gensupport.c
+++ b/gcc/gensupport.c
@@ -2322,14 +2322,6 @@ gen_reader::handle_unknown_directive (file_location loc, const char *rtx_name)
     process_rtx (x, loc);
 }
 
-/* Comparison function for the mnemonic hash table.  */
-
-static int
-htab_eq_string (const void *s1, const void *s2)
-{
-  return strcmp ((const char*)s1, (const char*)s2) == 0;
-}
-
 /* Add mnemonic STR with length LEN to the mnemonic hash table
    MNEMONIC_HTAB.  A trailing zero end character is appended to STR
    and a permanent heap copy of STR is created.  */
diff --git a/include/hashtab.h b/include/hashtab.h
index b3a6265eeb6e03cb10ac1907204e5783f71c66da..77c5eec7905515e1da6dce423d41d9b6cf37b525 100644
--- a/include/hashtab.h
+++ b/include/hashtab.h
@@ -192,6 +192,9 @@ extern htab_eq htab_eq_pointer;
 /* A hash function for null-terminated strings.  */
 extern hashval_t htab_hash_string (const void *);
 
+/* An equality function for null-terminated strings.  */
+extern int htab_eq_string (const void *, const void *);
+
 /* An iterative hash function for arbitrary data.  */
 extern hashval_t iterative_hash (const void *, size_t, hashval_t);
 /* Shorthand for hashing something with an intrinsic size.  */
diff --git a/libiberty/hashtab.c b/libiberty/hashtab.c
index 0c7208effe113020162a9b9e85147df20059b524..7c424e8f6cc1f11c62560d6db5a38dead4e266ea 100644
--- a/libiberty/hashtab.c
+++ b/libiberty/hashtab.c
@@ -841,6 +841,13 @@ htab_hash_string (const PTR p)
   return r;
 }
 
+/* An equality function for null-terminated strings.  */
+int
+htab_eq_string (const void *a, const void *b)
+{
+  return strcmp ((const char *) a, (const char *) b) == 0;
+}
+
 /* DERIVED FROM:
 --------------------------------------------------------------------
 lookup2.c, by Bob Jenkins, December 1996, Public Domain.