1 diff --git a/lib/regcomp.c b/lib/regcomp.c
2 index d5968bd..4926676 100644
5 @@ -541,7 +541,7 @@ regerror (errcode, preg, errbuf, errbuf_size)
7 #else /* size_t might promote */
9 -regerror (int errcode, const regex_t *_Restrict_ preg,
10 +regerror (int errcode, const regex_t *_Restrict_ preg _UNUSED_PARAMETER_,
11 char *_Restrict_ errbuf, size_t errbuf_size)
14 @@ -1415,7 +1415,7 @@ calc_first (void *extra, bin_tree_t *node)
16 /* Pass 2: compute NEXT on the tree. Preorder visit. */
18 -calc_next (void *extra, bin_tree_t *node)
19 +calc_next (void *extra _UNUSED_PARAMETER_, bin_tree_t *node)
21 switch (node->token.type)
23 @@ -2792,8 +2792,10 @@ build_range_exp (const reg_syntax_t synt
26 # ifdef RE_ENABLE_I18N
27 -build_collating_symbol (bitset_t sbcset, re_charset_t *mbcset,
28 - Idx *coll_sym_alloc, const unsigned char *name)
29 +build_collating_symbol (bitset_t sbcset,
30 + re_charset_t *mbcset _UNUSED_PARAMETER_,
31 + Idx *coll_sym_alloc _UNUSED_PARAMETER_,
32 + const unsigned char *name)
33 # else /* not RE_ENABLE_I18N */
34 build_collating_symbol (bitset_t sbcset, const unsigned char *name)
35 # endif /* not RE_ENABLE_I18N */
36 @@ -3377,7 +3379,8 @@ parse_bracket_exp (re_string_t *regexp,
39 parse_bracket_element (bracket_elem_t *elem, re_string_t *regexp,
40 - re_token_t *token, int token_len, re_dfa_t *dfa,
41 + re_token_t *token, int token_len,
42 + re_dfa_t *dfa _UNUSED_PARAMETER_,
43 reg_syntax_t syntax, bool accept_hyphen)
46 @@ -3464,8 +3467,10 @@ parse_bracket_symbol (bracket_elem_t *elem, re_string_t *regexp,
50 -build_equiv_class (bitset_t sbcset, re_charset_t *mbcset,
51 - Idx *equiv_class_alloc, const unsigned char *name)
52 +build_equiv_class (bitset_t sbcset,
53 + re_charset_t *mbcset _UNUSED_PARAMETER_,
54 + Idx *equiv_class_alloc _UNUSED_PARAMETER_,
55 + const unsigned char *name)
56 #else /* not RE_ENABLE_I18N */
57 build_equiv_class (bitset_t sbcset, const unsigned char *name)
58 #endif /* not RE_ENABLE_I18N */
59 @@ -3869,1 +3874,1 @@ free_token (re_token_t *node)
63 -free_tree (void *extra, bin_tree_t *node)
64 +free_tree (void *extra _UNUSED_PARAMETER_, bin_tree_t *node)
66 free_token (&node->token);