doc: Assume texinfo 4.0 or newer.

ChangeLog

@@ -1,3 +1,8 @@
+2018-09-14  Bruno Haible  <bruno@clisp.org>
+
+	doc: Assume texinfo 4.0 or newer.
+	* doc/gperf.texi: Omit Next, Prev, Up fields from @node lines.
+
 2018-09-08  Bruno Haible  <bruno@clisp.org>
 
 	Avoid "implicit fallthrough" warnings also from clang.

doc/gperf.texi

@@ -105,7 +105,7 @@ original English.
 @end ifnottex
 
 @ifset makeinfo
-@node Top, Copying, (dir), (dir)
+@node Top
 @top Introduction
 
 This manual documents the GNU @code{gperf} perfect hash function generator
@@ -162,11 +162,11 @@ Invoking @code{gperf}
 
 @end ifset
 
-@node Copying, Contributors, Top, Top
+@node Copying
 @unnumbered GNU GENERAL PUBLIC LICENSE
 @include gpl-3.0.texi
 
-@node Contributors, Motivation, Copying, Top
+@node Contributors
 @unnumbered Contributors to GNU @code{gperf} Utility
 
 @itemize @bullet
@@ -195,7 +195,7 @@ the input routines and the output routines for better reliability, and
 added a testsuite.
 @end itemize
 
-@node Motivation, Search Structures, Contributors, Top
+@node Motivation
 @chapter Introduction
 
 @code{gperf} is a perfect hash function generator written in C++.  It
@@ -217,7 +217,7 @@ A paper describing @code{gperf}'s design and implementation in greater
 detail is available in the Second USENIX C++ Conference proceedings
 or from @code{http://www.cs.wustl.edu/~schmidt/resume.html}.
 
-@node Search Structures, Description, Motivation, Top
+@node Search Structures
 @chapter Static search structures and GNU @code{gperf}
 @cindex Static search structure
 
@@ -285,7 +285,7 @@ not yet part of the official GNU distribution.  Each compiler utilizes
 @code{gperf} to automatically generate static search structures that
 efficiently identify their respective reserved keywords.
 
-@node Description, Options, Search Structures, Top
+@node Description
 @chapter High-Level Description of GNU @code{gperf}
 
 @menu
@@ -322,7 +322,7 @@ A helpful heuristic is that the larger the hash value range, the easier
 it is for @code{gperf} to find and generate a perfect hash function.
 Experimentation is the key to getting the most from @code{gperf}.
 
-@node Input Format, Output Format, Description, Description
+@node Input Format
 @section Input Format to @code{gperf}
 @cindex Format
 @cindex Declaration section
@@ -369,7 +369,7 @@ april
 @end group
 @end example
 
-@node Declarations, Keywords, Input Format, Input Format
+@node Declarations
 @subsection Declarations
 
 The keyword input file optionally contains a section for including
@@ -383,7 +383,7 @@ act like command-line options, as well as for providing a user-supplied
 * C Code Inclusion::            Including C declarations and definitions.
 @end menu
 
-@node User-supplied Struct, Gperf Declarations, Declarations, Declarations
+@node User-supplied Struct
 @subsubsection User-supplied @code{struct}
 
 If the @samp{-t} option (or, equivalently, the @samp{%struct-type} declaration)
@@ -436,7 +436,7 @@ january,   1, 31, 31
 @end group
 @end example
 
-@node Gperf Declarations, C Code Inclusion, User-supplied Struct, Declarations
+@node Gperf Declarations
 @subsubsection Gperf Declarations
 
 The declaration section can contain @code{gperf} declarations.  They
@@ -661,7 +661,7 @@ Prevents the transfer of the type declaration to the output file.  Use
 this option if the type is already defined elsewhere.
 @end table
 
-@node C Code Inclusion,  , Gperf Declarations, Declarations
+@node C Code Inclusion
 @subsubsection C Code Inclusion
 
 @cindex @samp{%@{}
@@ -689,7 +689,7 @@ march,     3, 31, 31
 @end group
 @end example
 
-@node Keywords, Functions, Declarations, Input Format
+@node Keywords
 @subsection Format for Keyword Entries
 
 The second input file format section contains lines of keywords and any
@@ -737,7 +737,7 @@ declaration section.  If the @samp{-t} option (or, equivalently, the
 these fields are simply ignored.  All previous examples except the last
 one contain keyword attributes.
 
-@node Functions, Controls for GNU indent, Keywords, Input Format
+@node Functions
 @subsection Including Additional C Functions
 
 The optional third section also corresponds closely with conventions
@@ -747,7 +747,7 @@ file, is included verbatim into the generated output file.  Naturally,
 it is your responsibility to ensure that the code contained in this
 section is valid C.
 
-@node Controls for GNU indent,  , Functions, Input Format
+@node Controls for GNU indent
 @subsection Where to place directives for GNU @code{indent}.
 
 If you want to invoke GNU @code{indent} on a @code{gperf} input file,
@@ -793,7 +793,7 @@ functions
 @end group
 @end example
 
-@node Output Format, Binary Strings, Input Format, Description
+@node Output Format
 @section Output Format for Generated C Code with @code{gperf}
 @cindex hash table
 
@@ -857,7 +857,7 @@ with the various input and output options, and timing the resulting C
 code, you can determine the best option choices for different keyword
 set characteristics.
 
-@node Binary Strings, Controlling Identifiers, Output Format, Description
+@node Binary Strings
 @section Use of NUL bytes
 @cindex NUL
 
@@ -882,7 +882,7 @@ generated by @code{gperf} will treat NUL like any other byte.
 Also, in this case the @samp{-c} option (or, equivalently, the
 @samp{%compare-strncmp} declaration) is ignored.
 
-@node Controlling Identifiers, Output Copyright, Binary Strings, Description
+@node Controlling Identifiers
 @section Controlling Identifiers
 
 The identifiers of the functions, tables, and constants defined by the code
@@ -940,7 +940,7 @@ the option @samp{-Q} (or, equivalently, the @samp{%define string-pool-name}
 declaration).
 @end itemize
 
-@node Output Copyright,  , Controlling Identifiers, Description
+@node Output Copyright
 @section The Copyright of the Output
 @cindex Copyright
 
@@ -959,7 +959,7 @@ software licenses, the result is that the the output is under the same
 license, with the same copyright holder, as the input that was passed to
 @code{gperf}.
 
-@node Options, Bugs, Description, Top
+@node Options
 @chapter Invoking @code{gperf}
 
 There are @emph{many} options to @code{gperf}.  They were added to make
@@ -976,7 +976,7 @@ complete list of options.
 * Verbosity::                   Informative Output
 @end menu
 
-@node Output File, Input Details, Options, Options
+@node Output File
 @section Specifying the Location of the Output File
 
 @table @samp
@@ -987,7 +987,7 @@ Allows you to specify the name of the file to which the output is written to.
 The results are written to standard output if no output file is specified
 or if it is @samp{-}.
 
-@node Input Details, Output Language, Output File, Options
+@node Input Details
 @section Options that affect Interpretation of the Input File
 
 These options are also available as declarations in the input file
@@ -1024,7 +1024,7 @@ an uppercase or lowercase conversion on the string before passing it to
 the @code{gperf} generated function.
 @end table
 
-@node Output Language, Output Details, Input Details, Options
+@node Output Language
 @section Options to specify the Language for the Output Code
 
 These options are also available as declarations in the input file
@@ -1065,7 +1065,7 @@ This option is supported for compatibility with previous releases of
 @code{gperf}.  It does not do anything.
 @end table
 
-@node Output Details, Algorithmic Details, Output Language, Options
+@node Output Details
 @section Options for fine tuning Details in the Output Code
 
 Most of these options are also available as declarations in the input file
@@ -1237,7 +1237,7 @@ This option is supported for compatibility with previous releases of
 @code{gperf}.  It does not do anything.
 @end table
 
-@node Algorithmic Details, Verbosity, Output Details, Options
+@node Algorithmic Details
 @section Options for changing the Algorithms employed by @code{gperf}
 
 @table @samp
@@ -1344,7 +1344,7 @@ table size may vary somewhat, since this technique is essentially a
 heuristic.
 @end table
 
-@node Verbosity,  , Algorithmic Details, Options
+@node Verbosity
 @section Informative Output
 
 @table @samp
@@ -1367,7 +1367,7 @@ information is dumped at the end of the program when the @samp{-d}
 option is enabled.
 @end table
 
-@node Bugs, Projects, Options, Top
+@node Bugs
 @chapter Known Bugs and Limitations with @code{gperf}
 
 The following are some limitations with the current release of
@@ -1402,7 +1402,7 @@ anyone considers this a problem write me and let me know so I can remove
 the constraint.
 @end itemize
 
-@node Projects, Bibliography, Bugs, Top
+@node Projects
 @chapter Things Still Left to Do
 
 It should be ``relatively'' easy to replace the current perfect hash
@@ -1429,7 +1429,7 @@ C and C++ routines.
 
 @page
 
-@node Bibliography, Concept Index, Projects, Top
+@node Bibliography
 @chapter Bibliography
 
 @noindent
@@ -1494,7 +1494,7 @@ Retrieving Method for Static Sets} Communications of the ACM, 20
 [15] Tiemann, Michael D. @i{User's Guide to GNU C++} Free Software
 Foundation, 1989.
 
-@node Concept Index,  , Bibliography, Top
+@node Concept Index
 @unnumbered Concept Index
 
 @printindex cp