nl_langinfo: Support abbreviated alternative month names on FreeBSD.

* m4/nl_langinfo.m4 (gl_FUNC_NL_LANGINFO): If HAVE_LANGINFO_ABALTMON
is 0, set REPLACE_NL_LANGINFO to 1.

ChangeLog

@@ -1,3 +1,9 @@
+2025-02-24  Bruno Haible  <[email protected]>
+
+	nl_langinfo: Support abbreviated alternative month names on FreeBSD.
+	* m4/nl_langinfo.m4 (gl_FUNC_NL_LANGINFO): If HAVE_LANGINFO_ABALTMON
+	is 0, set REPLACE_NL_LANGINFO to 1.
+
 2025-02-24  Bruno Haible  <[email protected]>
 
 	getlocalename_l-unsafe: Fix compilation error on OpenBSD, AIX.

m4/nl_langinfo.m4

@@ -1,5 +1,5 @@
 # nl_langinfo.m4
-# serial 11
+# serial 12
 dnl Copyright (C) 2009-2025 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -51,6 +51,7 @@ AC_DEFUN([gl_FUNC_NL_LANGINFO],
     if test $HAVE_LANGINFO_CODESET = 1 \
        && test $HAVE_LANGINFO_T_FMT_AMPM = 1 \
        && test $HAVE_LANGINFO_ALTMON = 1 \
+       && test $HAVE_LANGINFO_ABALTMON = 1 \
        && test $HAVE_LANGINFO_ERA = 1 \
        && test $FUNC_NL_LANGINFO_YESEXPR_WORKS = 1 \
        && test $NL_LANGINFO_MTSAFE = 1; then