doc/guile-udev.texi: Add indices

* doc/guile-udev.texi: Add indices.
* doc/indices.texi: New file.
* doc/Makefile.am (guile_udev_TEXINFOS): Add "indices.texi".

doc/Makefile.am

@@ -1,9 +1,9 @@
 ## Makefile.am -- Config file for GNU Automake.
 ##
-## Copyright (C) 2020 Artyom V. Poptsov <[email protected]>
+## Copyright (C) 2020-2023 Artyom V. Poptsov <[email protected]>
 ##
 ## This file is part of Guile-Udev.
-## 
+##
 ## Guile-Udev is free software: you can redistribute it and/or
 ## modify it under the terms of the GNU General Public License as
 ## published by the Free Software Foundation, either version 3 of the
@@ -23,6 +23,7 @@ info_TEXINFOS = guile-udev.texi
 
 guile_udev_TEXINFOS = \
 	guile-udev.texi	\
-	fdl.texi
+	fdl.texi	\
+	indices.texi
 
 ## Makefile.am ends here

doc/guile-udev.texi

@@ -10,7 +10,7 @@
 @copying
 This manual documents Guile-Udev version @value{VERSION}.
 
-Copyright (C) 2020 Artyom V. Poptsov @email{poptsov.artyom@@gmail.com}
+Copyright (C) 2020-2023 Artyom V. Poptsov @email{poptsov.artyom@@gmail.com}
 Copyright (C) 2023 Maxim Cournoyer @email{maxim.cournoyer@@gmail.com}
 
 Permission is granted to copy, distribute and/or modify this document
@@ -62,6 +62,12 @@ Documentation License.''
 * Examples::
 * GNU Free Documentation License::  The license of this manual.
 
+Indices
+
+* Type Index::
+* Procedure Index::
+* Concept Index::
+
 @end menu
 
 @contents
@@ -393,4 +399,6 @@ the project.
 
 @include fdl.texi
 
+@include indices.texi
+
 @bye

doc/indices.texi

@@ -0,0 +1,20 @@
+@c -*-texinfo-*-
+@c This file is part of Guile-PNG Reference Manual.
+@c Copyright (C) 2023 Artyom V. Poptsov
+@c See the file guile-png.texi for copying conditions.
+
+@page
+@node Type Index
+@unnumbered Type Index
+
+@printindex tp
+
+@node Procedure Index
+@unnumbered Procedure Index
+
+@printindex fn
+
+@node Concept Index
+@unnumbered Concept Index
+
+@printindex cp