https://git.alpinelinux.org/aports/plain/main/elfutils/musl-macros.patch
--- a/lib/system.h
+++ b/lib/system.h
@@ -56,6 +56,10 @@ void error(int status, int errnum, const char *format, ...);
 #error "err.h or error.h must be available"
 #endif
 
+#if !defined(FNM_EXTMATCH)
+# define FNM_EXTMATCH 0
+#endif
+
 /* error (EXIT_FAILURE, ...) should be noreturn but on some systems it
    isn't.  This may cause warnings about code that should not be reachable.
    So have an explicit error_exit wrapper that is noreturn (because it