Add generic documentation

gcc/gelna.texi

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+\input texinfo @c -*-texinfo-*-
+@setfilename gelna.info
+@settitle The GNU Elna Compiler
+
+@c Create a separate index for command line options
+@defcodeindex op
+@c Merge the standard indexes into a single one.
+@syncodeindex fn cp
+@syncodeindex vr cp
+@syncodeindex ky cp
+@syncodeindex pg cp
+@syncodeindex tp cp
+
+@include gcc-common.texi
+
+@c Copyright years for this manual.
+@set copyrights-elna 2025
+
+@copying
+@c man begin COPYRIGHT
+Copyright @copyright{} @value{copyrights-elna} Free Software Foundation, Inc.
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the
+@c man end
+section entitled ``GNU Free Documentation License''.
+@ignore
+@c man begin COPYRIGHT
+man page gfdl(7).
+@c man end
+@end ignore
+@end copying
+
+@ifinfo
+@format
+@dircategory Software development
+@direntry
+* Gelna: (gelna).           A GCC-based compiler for the Elna language
+@end direntry
+@end format
+
+@insertcopying
+@end ifinfo
+
+@titlepage
+@title The GNU Elna Compiler
+@versionsubtitle
+@author Eugen Wissner
+
+@page
+@vskip 0pt plus 1filll
+Published by the Free Software Foundation @*
+51 Franklin Street, Fifth Floor@*
+Boston, MA 02110-1301, USA@*
+@sp 1
+@insertcopying
+@end titlepage
+@contents
+@page
+
+@node Top
+@top Introduction
+
+This manual describes how to use @command{gelna}, the GNU compiler for
+the Elna programming language.  This manual is specifically about how to
+invoke @command{gelna}.
+
+@menu
+* Copying::                     The GNU General Public License.
+* GNU Free Documentation License::
+                                How you can share and copy this manual.
+* Invoking gelna::              How to run gelna.
+* Option Index::                Index of command line options.
+* Keyword Index::               Index of concepts.
+@end menu
+
+
+@include gpl_v3.texi
+
+@include fdl.texi
+
+
+@node Invoking gelna
+@chapter Invoking gelna
+
+@c man title gelna A GCC-based compiler for the Elna language
+
+@ignore
+@c man begin SYNOPSIS gelna
+gelna [@option{-c}|@option{-S}]
+      [@option{-g}] [@option{-pg}]
+      [@option{-o} @var{outfile}] @var{infile}@dots{}
+
+Only the most useful options are listed here; see below for the
+remainder.
+@c man end
+@c man begin SEEALSO
+gpl(7), gfdl(7), fsf-funding(7), gcc(1)
+and the Info entries for @file{gelna} and @file{gcc}.
+@c man end
+@end ignore
+
+@c man begin DESCRIPTION gelna
+
+The @command{gelna} command is a frontend to @command{gcc} and
+supports many of the same options.  @xref{Option Summary, , Option
+Summary, gcc, Using the GNU Compiler Collection (GCC)}.  This manual
+only documents the options specific to @command{gelna}.
+
+@c man end
+
+@c man begin OPTIONS gelna
+
+@c man end
+
+@node Option Index
+@unnumbered Option Index
+
+@command{gelna}'s command line options are indexed here without any
+initial @samp{-} or @samp{--}.  Where an option has both positive and
+negative forms (such as -foption and -fno-option), relevant entries in
+the manual are indexed under the most appropriate form; it may sometimes
+be useful to look up both forms.
+
+@printindex op
+
+@node Keyword Index
+@unnumbered Keyword Index
+
+@printindex cp
+
+@bye