https://bugs.gentoo.org/899854
also, feature-macro'd glibc functions
--- a/configure.ac	2025-01-05 00:30:25.475280699 +0400
+++ b/configure.ac	2025-01-05 00:30:38.800207692 +0400
@@ -6,7 +6,8 @@
 
 AM_INIT_AUTOMAKE
+AC_USE_SYSTEM_EXTENSIONS
 AM_GNU_GETTEXT([external])
-AM_GNU_GETTEXT_VERSION
+AM_GNU_GETTEXT_VERSION(0.21)
 AM_ICONV
 
 AC_PROG_CC
Bad definition, fails with C23
https://bugs.gentoo.org/945206
--- a/src/keys.c	2025-01-05 00:39:12.053395586 +0400
+++ b/src/keys.c	2025-01-05 00:39:42.420229207 +0400
@@ -76,7 +76,7 @@
 extern int build_data_tree(char *cddb_server, char *local_cddb_db,
 			   song_typ **ret_tree, BOOL force_sampler);
 extern int cddb_internet_lookup (char *addr, char *cddb_path, BOOL force);
-extern void option_menu();
+extern void option_menu(WINDOW *win);
 extern int output_batch(song_typ *anchor, char *filenm, BOOL ask_overwrite);
 extern void calc_tot_frm();
 extern int add_to_m3u(song_typ *song);