1 files changed, 8 insertions, 1 deletions

diff --git a/gl/langinfo.in.h b/gl/langinfo.in.h
index c7555a6a..febbd25f 100644
--- a/gl/langinfo.in.h
+++ b/gl/langinfo.in.h
@@ -1,5 +1,5 @@
 /* Substitute for and wrapper around <langinfo.h>.
-   Copyright (C) 2009-2023 Free Software Foundation, Inc.
+   Copyright (C) 2009-2024 Free Software Foundation, Inc.
 
    This file is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
@@ -34,6 +34,11 @@
 #ifndef _@GUARD_PREFIX@_LANGINFO_H
 #define _@GUARD_PREFIX@_LANGINFO_H
 
+/* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*.  */
+#if !_GL_CONFIG_H_INCLUDED
+ #error "Please include config.h first."
+#endif
+
 
 #if !@HAVE_LANGINFO_H@
 
@@ -208,7 +213,9 @@ _GL_FUNCDECL_SYS (nl_langinfo, char *, (nl_item item));
 #  endif
 _GL_CXXALIAS_SYS (nl_langinfo, char *, (nl_item item));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (nl_langinfo);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef nl_langinfo
 # if HAVE_RAW_DECL_NL_LANGINFO