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-rw-r--r--doc/Makefile.am8
1 files changed, 6 insertions, 2 deletions
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 3f33218e..fcaa5b08 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,5 +1,5 @@
## Makefile for the doc subdirectory of GNU libunistring.
-## Copyright (C) 2009, 2011, 2014, 2017-2019 Free Software Foundation, Inc.
+## Copyright (C) 2009, 2011, 2014, 2017-2023 Free Software Foundation, Inc.
##
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
@@ -28,7 +28,11 @@ TEXINCLUDES = -I .
RM = rm -f
-MAKEINFO = env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= @MAKEINFO@
+# The customization variable CHECK_NORMAL_MENU_STRUCTURE is necessary with
+# makeinfo versions ≥ 6.8.
+MAKEINFO = \
+ env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= \
+ @MAKEINFO@ -c CHECK_NORMAL_MENU_STRUCTURE=1
MAKEINFOFLAGS = $(TEXINCLUDES) --no-split
info_TEXINFOS = libunistring.texi