patch 8.0.0173: build fails with EBCDIC defined

Problem:    When compiling with EBCDIC defined the build fails. (Yaroslav
            Kuzmin)
Solution:   Move sortFunctions() to the right file.  Avoid warning for
            redefining __SUSV3.

src/eval.c

@@ -242,14 +242,38 @@ static void list_one_var(dictitem_T *v, char_u *prefix, int *first);
 static void list_one_var_a(char_u *prefix, char_u *name, int type, char_u *string, int *first);
 static char_u *find_option_end(char_u **arg, int *opt_flags);
 
-#ifdef EBCDIC
-static int compare_func_name(const void *s1, const void *s2);
-static void sortFunctions();
-#endif
-
 /* for VIM_VERSION_ defines */
 #include "version.h"
 
+
+#if defined(EBCDIC) || defined(PROTO)
+/*
+ * Compare struct fst by function name.
+ */
+    static int
+compare_func_name(const void *s1, const void *s2)
+{
+    struct fst *p1 = (struct fst *)s1;
+    struct fst *p2 = (struct fst *)s2;
+
+    return STRCMP(p1->f_name, p2->f_name);
+}
+
+/*
+ * Sort the function table by function name.
+ * The sorting of the table above is ASCII dependant.
+ * On machines using EBCDIC we have to sort it.
+ */
+    static void
+sortFunctions(void)
+{
+    int		funcCnt = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
+
+    qsort(functions, (size_t)funcCnt, sizeof(struct fst), compare_func_name);
+}
+#endif
+
+
 /*
  * Initialize the global and v: variables.
  */