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-							-*-Text-*-
-%%% LEGALESE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-% This file is part of CWEBbin (Version 3.64c [2019]).
-% (Set TAB to 8 spaces to get the spacing right.)
-% The CWEB programs by Silvio Levy are based on programs by D. E. Knuth.
-% They are distributed WITHOUT ANY WARRANTY, express or implied.
-
-% This README file was last updated January 1, 2019 by Andreas Scherer.
-
-% The following copyright notices extend to the respective parts of the
-% changed or added source code introduced in this patch only, not to the
-% original CWEB distribution, which is copyright (C) 1987,1990,1993,1998
-% by Silvio Levy and Donald E. Knuth.
-%
-% Copyright (C) 1991-1993 Hans-Hermann Bode
-% Copyright (C) 1992 Klaus Guntermann
-% Copyright (C) 1991,1993 Carsten Steger
-% Copyright (C) 1993-2000,2005,2011,2018,2019 Andreas Scherer
-
-% Permission is granted to make and distribute verbatim copies of this
-% document provided that the copyright notice and this permission notice
-% are preserved on all copies.
-
-% Permission is granted to copy and distribute modified versions of this
-% document under the conditions for verbatim copying, provided that the
-% entire resulting derived work is given a different name and distributed
-% under the terms of a permission notice identical to this one.
-
-% Please send comments, suggestions, etc., concerning the original CWEB
-% implementation to tex-k@tug.org.
-
-% Please send comments, suggestions, etc., related to changes specific
-% for this modified distribution CWEBbin, especially language catalog
-% translations to https://ascherer.github.io, or write an issue or pull
-% request in https://github.com/ascherer/cwebbin.
-
-%%% WHAT IS THIS STUFF? %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-CWEBbin is the ANSI-C/C++ implementation of Silvio Levy's and Donald Ervin
-Knuth's CWEB system, compiled and provided with changefiles for ANSI-C and
-makefiles for Borland C/C++ 3.1 (no longer actively supported), MS/VC++ 4.1
-and 6.0 (both no longer actively supported), SAS/C++ 6.57 (no longer actively
-supported), and most of all UNIX-cc/g++.  Additional features differing from
-the original distribution are described further below.  General information is
-provided in the original README file shipped with the CWEB distribution.
-
-CWEBbin started from the Amiga port of CWEB 2.8 by Carsten Steger.  Then it
-was merged with the CWEB-PC 3.0 distribution by Hans-Hermann Bode and Klaus
-Guntermann, and the Amiga port of CWEB 3.1 by Tomas Charles Willis.  Of
-course, it includes all features of the original UNIX implementation and all
-enhancements of these Amiga and MS/DOS/Windows ports.
-
-The distribution of CWEBbin consists of the additional files for this patch
-only.  The complete contents of the original distribution is a prerequisite.
-CWEB can be retrieved via anonymous ftp from
-
-	FTP: ftp://ftp.cs.stanford.edu/pub/cweb
-	CTAN: https://ctan.org/pkg/cweb
-
-To apply this patched version of CWEB, extract the patch archive (yielding a
-new subdirectory) and add the original distribution.  Care has been taken to
-avoid collisions with any files from the original distribution and the
-Makefiles provide a target to cleanly remove the patch leaving only the files
-of the original distribution (and vice versa).
-
-Intermediate files with extensions .tex and .cxx are reproducable from the
-general sources by means of an executable ctangle, cweave, and an ANSI-C/C++
-compiler.  In addition you need Klaus Guntermann's TIE processor, which is
-available at
-
-	CTAN: https://ctan.org/pkg/tie
-
-TIE should be available on all systems with a recent TeX installation.
-Alternatively, you can also try to use Julian Gilbey's CTIE processor, but
-intermediate results are different.
-
-%%% TABLE OF CONTENTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-The following files were added to this distribution by various contributors:
-
-GENERAL CONTRIBUTION:
-.
-├── 0001-Make-clean-twinx.patch		Patch for twinx.w
-├── 0002-Make-clean-refsort.patch	Patch for refsort.w
-├── arexx				[AMIGA]
-│   ├── catalogs
-│   │   ├── cweb_arexx.cd		[AMIGA] catalog description for German defaults
-│   │   ├── cweb_arexx.e.ct		[AMIGA] catalog translation for English users
-│   │   ├── cweb_arexx.f.ct		[AMIGA] catalog translation for French users
-│   │   ├── cweb_arexx.i.ct		[AMIGA] catalog translation for Italian users
-│   │   ├── english
-│   │   │   └── cweb_arexx.catalog	[AMIGA] message catalog for English users
-│   │   ├── francais
-│   │   │   └── cweb_arexx.catalog	[AMIGA] message catalog for French users
-│   │   └── italiano
-│   │       └── cweb_arexx.catalog	[AMIGA] message catalog for Italian users
-│   ├── compile.ced			[AMIGA] ARexx script to start SAS/C 6.x from CED (V3.5+)
-│   └── start_web.ced			[AMIGA] ARexx script to start cweave/ctangle from CED
-├── catalogs
-│   ├── cweb.cd				[AMIGA] catalog description for English defaults
-│   ├── cweb.d.ct			[AMIGA] catalog translation for German users
-│   ├── cweb.i.ct			[AMIGA] catalog translation for Italian users
-│   ├── dcweb.h				[AMIGA,BCC] header file with the German strings
-│   ├── ecweb.h				[AMIGA,BCC] header file with the English default strings
-│   └── icweb.h				[AMIGA,BCC] header file with the Italian strings
-├── comm-ansi.ch			change file for common.w
-├── comm-ansi.hch			change file for common.h
-├── comm-arexx.ch			[AMIGA] change file for common.w
-├── comm-arexx.hch			[AMIGA] change file for common.h
-├── comm-borlandc.ch			[BCC] change file for common.w
-├── comm-borlandc.hch			[BCC] change file for common.h
-├── comm-extensions.ch			change file for common.w
-├── comm-extensions.hch			change file for common.h
-├── comm-i18n.ch			change file for common.w
-├── comm-i18n.hch			change file for common.h
-├── comm-memory.ch			[AMIGA,BCC] change file for common.w
-├── comm-memory.hch			[AMIGA,BCC] change file for common.h
-├── comm-newpage.ch			change file for common.w
-├── common.cxx				product of common.w and comm-foo.ch
-├── comm-output.ch			change file for common.w
-├── comm-output.hch			change file for common.h
-├── comm-patch.ch			change file for common.w
-├── comm-texlive.ch			change file for common.w
-├── comm-texlive.hch			change file for common.h
-├── comm-translation.ch			[AMIGA,BCC] change file for common.w
-├── comm-translation.hch		[AMIGA,BCC] change file for common.h
-├── ctang-ansi.ch			change file for ctangle.w
-├── ctang-borlandc.ch			[BCC] change file for ctangle.w
-├── ctang-extensions.ch			change file for ctangle.w
-├── ctang-i18n.ch			change file for ctangle.w
-├── ctangle.1				clone of cweb.1
-├── ctangle.cxx				product of ctangle.w and ctang-foo.ch
-├── ctangle.dsp				[MSVC] Developer Studio Project for CTANGLE
-├── ctang-memory.ch			[AMIGA,BCC] change file for ctangle.w
-├── ctang-newpage.ch			change file for ctangle.w
-├── ctang-output.ch			change file for ctangle.w
-├── ctang-patch.ch			change file for ctangle.w
-├── ctang-texlive.ch			change file for ctangle.w
-├── ctang-translation.ch		[AMIGA,BCC] change file for ctangle.w
-├── ctwill.bux				auxiliary file for CTWILL
-├── ctwill.md				manpage for CTWILL in markdown
-├── ctwill-mini.ch			auxiliary file for CTWILL
-├── ctwill-refsort.1			manpage link to ctwill.1
-├── ctwill-texlive.ch			change file for cweave.w/ctwill.w
-├── ctwill-twinx.1			manpage link to ctwill.1
-├── cweav-ansi.ch			change file for cweave.w
-├── cweav-borlandc.ch			[BCC] change file for cweave.w
-├── cweave.1				clone of cweb.1
-├── cweave.dsp				[MSVC] Developer Studio Project for CWEAVE
-├── cweav-extensions.ch			change file for cweave.w
-├── cweav-i18n.ch			change file for cweave.w
-├── cweav-memory.ch			[AMIGA,BCC] change file for cweave.w
-├── cweav-newpage.ch			change file for cweave.w
-├── cweav-output.ch			change file for cweave.w
-├── cweav-patch.ch			change file for cweave.w
-├── cweav-texlive.ch			change file for cweave.w
-├── cweav-translation.ch		[AMIGA,BCC] change file for cweave.w
-├── cweav-twill.ch			change file for cweave.w
-├── cwebbin.dsw				[MSVC] Developer Studio Workspace for all three
-├── cwebbin.spec			extended build recipe for debbuild
-├── cwebinputs
-│   ├── amiga_types.w			keywords by Commodore and SAS
-│   ├── c++1xlib.w			Keywords for modern C++ standards
-│   ├── cweb_ecma94.w			Transliteration table for Latin-1
-│   ├── cweb_hp8.w			Transliteration table for HP Roman 8
-│   ├── cweb_mac8.w			Transliteration table for Mac 8-bit
-│   └── cweb_pc850.w			Transliteration table for Codepage 850
-│   ├── iso_types.w			Keywords for ISO C/C++ standards
-├── cwebman.ch				change file for cwebman.tex
-├── examples
-│   ├── cct.w				program to translate between character tables
-│   ├── commonwords.w			program to count word frequencies in text files
-│   ├── extex-ansi.ch			change file for extex.w
-│   ├── Makefile.sas			[AMIGA] makefile for SAS/C compiler 6.0 and up
-│   ├── matrix.w			C++ program to invert complex 4x4 matrices
-│   ├── primes.ch			changes for the first 1000000 prime numbers
-│   ├── primes.w		     	program to print the first 1000 prime numbers
-│   ├── README.p11			extended description for the added examples
-│   ├── sample.w		     	program to produce random numbers
-│   ├── treeprint-ansi.ch		change file for treeprint.w
-│   ├── wc-ansi.ch			change file for wc.w
-│   ├── wmerg-ansi.ch			change file for wmerge.w
-│   ├── wmerg-borlandc.ch		[BCC] change file for wmerge.w
-│   ├── wmerge.dsp			[MSVC] Developer Studio Project for WMERGE
-│   ├── wmerg-extensions.ch		change file for wmerge.w
-│   ├── wmerg-memory.ch			[AMIGA,BCC] change file for wmerge.w
-│   ├── wmerg-output.ch			change file for wmerge.w
-│   ├── wmerg-patch.ch			change file for wmerge.w
-│   └── wordtest-ansi.ch		change file for wordtest.w
-├── LICENSE				MIT license
-├── Makefile.bcc			[BCC] makefile for Borland C/C++
-├── Makefile.sas			[AMIGA] makefile for SAS/C compiler 6.0 and up
-├── Makefile.unix			makefile for cc, c89, gcc, ... on several machines
-├── po
-│   ├── cweb.pot			Portable Object Template for i18n
-│   ├── cweb-tl.pot			Portable Object Template for i18n
-│   ├── de
-│   │   ├── cweb.po			Portable Object for German t10n
-│   │   ├── cweb-tl.po			Portable Object for German t10n
-│   │   └── web2c-help.po		Portable Object for German t10n
-│   ├── it
-│   │   └── cweb.po			Portable Object for Italian t10n
-│   └── web2c-help.pot			Portable Object Template for i18n
-├── prod-twill.ch			change file for prod.w/CTWILL
-├── README.md				Github project description
-├── README.txt				the current file
-├── system.bux				auxiliary file for CTWILL
-├── texinputs
-│   ├── cweb_ecma94.sty			Umlauts and special characters for Latin-1
-│   ├── cweb_hp8.sty			Umlauts and special characters for HP Roman 8
-│   ├── cweb_mac8.sty			Umlauts and special characters for Macintosh
-│   ├── cweb_pc850.sty			Umlauts and special characters for IBM 850
-│   ├── dctwimac.tex			German captions in addition to ctwimac.tex
-│   ├── dcwebmac.tex			German captions in addition to cwebmac.tex
-│   ├── dcwebstrings.tex		Common German captions
-│   ├── dproofmac.tex			German captions in addition to proofmac.tex
-│   ├── fcwebmac.tex			French captions in addition to cwebmac.tex
-│   ├── icwebmac.tex			Italian captions in addition to cwebmac.tex
-│   └── Xcwebmac.tex			beautifications for cwebmac.tex
-└── texlive.w				introduction to *-w2c.ch change files
-
-%%% HOW TO CREATE THE BINARIES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-[UNIX/Linux, GCC] The current setup of CWEBbin has been created on a Linux PC
-	running GNU/Linux including the gcc/g++ compiler and the TeXLive system.
-	Any similar setup should also work.  All set?
-	-- Then proceed as follows:
-
-	1. Check the entries in Makefile.unix for local conditions like a
-	different compiler name or additional compiler options you want to
-	use.  Check also the other lines in Makefile.unix so that all
-	directory definitions are set properly for your local system
-	configuration.
-
-	2. If you want to create the ctangle and cweave binaries for a
-	different language than English, set a link from one of the
-	`[dei]cweb.h' header files to `cweb.h' in the ./catalogs directory.
-
-	3. Touch common.cxx and ctangle.cxx to make them up-to-date.  Then say
-	`make -f Makefile.unix boot'; this will create a local ctangle binary
-	simply by compiling the distributed .cxx files.
-
-	4. To make ctangle, cweave, and the wmerge processor say `make -f
-	Makefile.unix [all]'.  To get some reassurance that things are OK, you
-	can say `make cautiously', which ensures that ctangle will reproduce
-	itself.  (Otherwise the source files common.w and ctangle.w won't
-	actually have been used.)
-
-	5. After all is set, you should become `superuser' and run `make -f
-	Makefile.unix install'; this will install the binaries, the TeX macros
-	and CWEB @include files, and some documentation in places specified in
-	Makefile.unix.
-
-	6. If you want a full documentation of the tangle and weave programs,
-	type `make -f Makefile.unix docs' or preferably `make -f Makefile.unix
-	fullmanual'.  The documentation created will include all changes
-	introduced by the .ch files.
-
-	7. To delete all intermediate files created in the make processes say
-	`make -f Makefile.unix clean'.
-
-	8. To remove the complete patch from the installed CWEB system, say
-	`make -f Makefile.unix remove'.  You will be left with the original
-	CWEB system.
-
-	9. To remove the complete base system leaving only the patch behind,
-	you can say `make -f Makefile.unix remove-orig'.
-
-	10. The other labels have not been tested seriously. :-)
-
-[AMIGA, SAS/C++ 6] I can no longer support this compiler and computer system
-	and most likely it's impossible to install CWEBbin with SAS/C++.  The
-	source files common.cxx, common.h, and ctangle.cxx can definitely NOT
-	be used with SAS/C++ anymore.  They were created on a Linux PC leaving
-	the Amiga stuff out.  You will have to use an older ctangle binary to
-	create the TIE processor and then create the complete set of change
-	files according to Makefile.sas.  Good luck!
-
-[MS/DOS, BORLAND C++ 3.1] I can no longer support this compiler and most
-	likely it's impossible to install CWEBbin with BC.  The source files
-	common.cxx, common.h, and ctangle.cxx can definitely NOT be used with
-	BC anymore.  They were created on a Linux PC leaving the
-	`*-borlandc.*' change files out.  You will have to use an older
-	ctangle.exe binary to create the TIE processor and then create the
-	complete set of change files according to Makefile.bcc.  Good luck!
-
-[MS/WINDOWS, MS/VC++ 4.1 and 6.0] I can no longer support this compiler and
-	most likely it is impossible to install CWEBbin with this version of
-	the Microsoft compiler.  The current version of MS/VC++ is supported
-	through binary versions of CTANGLE and CWEAVE at
-	http://www.literateprogramming.com.
-
-%%% LIST OF FEATURES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-After the announcement of CWEB 3.3 [p11a] on news:comp.programming.literate
-and news:comp.text.tex there have been questions: ``What's different in your
-CWEB system in respect to the original system?  Why should programmers use
-your's instead of the Levy/Knuth distribution?''
-
-So here are some words about the `special features':
-
-   - [GENERAL] The complete source code can (or at least at some point of time
-     could) be recompiled with SAS/C for AmigaOS, with Borland C/C++ 3.1 for
-     MS/DOS, with MS/VC++ 4.1 and 6.0 for MS/Windows, and with CC, C89, and
-     GCC for UNIX without the need for further changes.  Well, to be honest,
-     the complete source code was only compiled using GCC.
-
-   - [GENERAL] The `+l' (or `-l') option with its argument `X' causes CWEAVE
-     to prepend `X' to `cwebmac.tex' in the first line of the output file.
-     `X' may be any string of characters (case dependent and possibly empty),
-     e.g., if you called CWEAVE with the option `+ldansk', the danish  macro
-     file `danskcwebmac.tex' (if there's such a thing) would be included
-     instead of `cwebmac.tex'.  The macro file `Xcwebmac.tex' itself contains
-     some modifications to the original `cwebmac.tex' file as described in the
-     documentation.  At the time of writing there are macro packages
-     `dcwebmac.tex' by  Andreas Scherer for German users, `icwebmac.tex' by
-     Giuseppe Ghibò for Italian users, and `fcwebmac.tex' by Denis B. Roegel
-     for French users.  These macro files translate all captions used by the
-     CWEAVE processor into the respective languages and also include support
-     for special characters like umlauts (diacritics) and some other
-     frequently used specials according to ISO Latin-1, IBM PC International
-     Codepage 850, Macintosh 8-bit font table and HP Roman 8.  Similar
-     packages for other languages can easily be added to this scheme.  To date
-     there are no conflicting languages, so single-character strings are used.
-     However, there is no support for UTF-8 at this time.
-
-   - [GENERAL] <Obsolete> As of March 1997 five new macros with the prefix
-     `pdf' are available.  Together with the "tex2pdf/pdftex" system they
-     enable the presenation of CWEB source code in "Hyper CWEB" form, i.e.,
-     all section references and the table of contents are hyperlinked and can
-     be used in PDF readers.  Call "cweave -lpdf" (or "cweave -lpdfd", etc.)
-     to include the respective macro file in the TeX output, before running
-     "pdftex". </Obsolete>  As of July 2000 these macros are united with the
-     generic macros, i.e., `cwebmac.tex' can be used with "plain TeX," "plain
-     TeX + dvipdfm," and "pdftex."
-
-   - [GENERAL] There are transliteration tables `cweb_ecma94.w', `cweb_hp8.w',
-     `cweb_mac8.w', and `cweb_pc850.w' for @inclusion in limbo.  These files
-     \input the associated TeX macro files `cweb_ecma94.sty', `cweb_hp8.sty',
-     `cweb_mac8.sty', and `cweb_pc850.sty' with i18n support of extended code
-     tables.  These macros can, of course, also be used independently of
-     the CWEB files and have been set up to work as `packages' for LaTeX
-     as well.  The option `+a' of former versions of the AMIGA installation
-     is now replaced by the file `amiga_types.w' that can be `@i'ncluded in
-     the source files where needed.
-
-   - [GENERAL] Both CTANGLE and CWEAVE are fully localized for other natural
-     languages than the English default.  See the 'po/' directory for the
-     files used with the "GNU gettext utilities".
-     <Obsolete>#include files with the English, German, and Italian strings
-     are provided in the ./catalogs directory for non-localized operating
-     systems.  On AmigaOS 2.1/3.0 localization is done with the help of
-     language catalogs and the system `locale.library'.  Default is (of
-     course) English; catalogs descriptions for German and Italian are
-     provided and other language catalogs can easily be added.</Obsolete>
-
-   - [GENERAL] An algorithm for recursive `@i'nclude file search was adapted
-     from the Web2c implementation of TeX and METAFONT.  The weave and tangle
-     processors as well as wmerge now recognize the environment variable
-     CWEBINPUTS.  When an include file name (argument to the @i command) can
-     not be found in the current directory or in the absolute path, a
-     multi-path search is performed.  CWEBINPUTS---if not empty---may contain
-     a list of search path names, delimited by PATH_SEPARATORs, e.g., colons.
-     The current directory is represented by an empty path entry, but it is
-     searched first anyway.  In the respective makefiles for AMIGA, UNIX and
-     MS/DOS some decent defaults are set in the compile time constant
-     CWEBINPUTS, which always is appended to any environment variable, so you
-     don't have to repeat the defaults.
-
-   - [GENERAL] The `-o' option was added in connection with Carsten Steger's
-     `-i' option.  Both affect typographic niceties in the woven output.
-
-   - [GENERAL] The output files of CTANGLE and CWEAVE are only written when
-     there are significant changes to their contents, i.e., when a CWEB source
-     creates multiple output files, only those modules effected by changes
-     will be recompiled in the `make' process.  This mechanism was taken from
-     Preston Briggs's NUWEB program, to whom credit is due.
-
-   - [GENERAL] Five additional CWEB example programs are included as examples
-     for the portability between PASCAL-WEB and C-CWEB and for the usage of
-     the C++ features of version 3.1.  The fifth example program is a simple
-     text converter for files with extended character codes of ISO-Latin-1,
-     PC-850, MAC 8-bit font, and HP 8-bit font.
-
-   - [GENERAL] The latest release of CWEBbin is fully compatible with the
-     "TeX Live" system.  'cwebbin.spec' and 'Makefile.unix' are prepared to
-     work with the '--with texlive' option.  This appends and merges the
-     *-texlive.* change files and creates a set of *-w2c.ch change files and
-     an extended comm-foo.h @include file.  These files are drop-in
-     replacements for the hand-coded files used in the TL ecosystem.
-
-   - [GENERAL] The latest latest release of CWEBbin includes CWEAVE's
-     'evil twin' CTWILL, together with its utility programs 'refsort' and
-     'twinx', and the associated TeX macros.
-
-   - [AMIGA] Two AREXX scripts for use with the CygnusEd Professional Editor
-     were added to this package, one for CTANGLE and CWEAVE, localized with
-     the help of language catalogs under AmigaOS version 2.1 or 3.0, the other
-     for use with the SAS/C 6.x compiler in connection with CED V3.5.
-
-   - [AMIGA] All three system programs support the `version' information
-     command of the Amiga operating system.
-
-   - [AMIGA] All three system programs are compiled in the NEAR data segment
-     and can be made `resident'.
-
-   - [AMIGA] The `+m' option enables ARexx communication between CWEB and the
-     SAS/C message browser SCMSG.  Any warnings or error messages are
-     transferred to its list window.  The behaviour of  this feature can be
-     controlled via the external environment variable SCMSGOPT, which may be
-     set to any legal option string as described in the documentation of the
-     SAS/C development system by SAS Institute.
-
-%%% A BIT OF HISTORY %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-Patch level [p9b] of this implementation introduced localization to other
-languages than English.  All output strings of ctangle and cweave were
-replaced by variable references to an array AppStrings in cweb.h (also new),
-set to the English defaults at startup time.  This works for all systems and
-compilers in a compatible way.  However, version 2.1 of the AMIGA operating
-system introduced the use of language catalogs, thus enabling programs and
-applications to be inherently multilingual without recompilation.  To
-activate this feature, you only have to install AmigaOS 2.1/3.0.  Catalogs
-for various natural languages are already present at the correct place
-(./catalogs/), so ctangle and cweave will greet you in any of these
-languages, if you start them from their home directory ./bin and if your
-system default language is supported.  If you want to use CTANGLE, CWEAVE,
-and WMERGE as resident programs, you have to move the language catalogs to
-the appropriate directories of the LOCALE: drawer.  Catalog translations for
-other languages can easily be installed.  The author of this distribution
-would be grateful to receive catalog translations for other languages for
-inclusion in future versions.
-
-Patch level [p9d] of this implementation introduced dynamic memory allocation
-for all internal arrays except for `flags[256]'.  By this method both ctangle
-and cweave can be compiled in the `NEAR' data segment, so on the AMIGA they
-can be made `resident', i.e., they can reside in RAM and don't have to be
-loaded from disk after the first time.  Patch level [p9d] also introduced an
-ARexx communication facility between CWEB (i.e., ctangle and cweave) and the
-`Message Browser' SCMSG, included in the SAS/C 6.X development system.  If
-you run CWEB with the `+m' option, any error messages will be displayed in
-the window of SCMSG.  The default setting is `off'.  You can control the
-behaviour of this feature by setting the environment variable SCMSGOPT to
-a string with any legal command line options for SCMSG as described in the
-documentation provided with the compiler package by SAS Institute. If the
-environment variable is not set, the default behaviour of SCMSG will be used.
-Patch level [p9d] was evaluated on July 1, 1994, by Andreas Scherer and
-Burkhard Schmitt of Bayreuth University with CC and GCC on a HP Apollo
-workstation and a Sun 4 workstation and a SGI workstation, and on July 2,
-with Borland C/C++ version 3.1 on a MS/DOS machine without any problems.
-
-Patch level [p10] was released to the AmiNet and the Comprehensive TeX
-Archive Network (CTAN) in August 1994.  At least one user had problems
-installing the MS/DOS version.
-
-Patch level [p11] was released to the AmiNet and the Comprehensive TeX
-Archive Network (CTAN) in December 1994.  Only two days later another
-update of CWEB 3.3 was released in Stanford, so a new patch level [p11a]
-had to be created and released in mid-December 1994.  In January 1995 the
-successful installation on at least two more systems has been notified.
-The first is MS/DOS with GCC, the second OS/2 in genuine mode, both working
-with Makefile.unix (and the obvious modifications).
-
-%%% CREDIT WHERE CREDIT IS DUE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-I want to express my deep gratitude to Silvio Levy and Donald Knuth for the
-marvelous tool they provided us with.  Also I am indepted to my various pre-
-and co-workers on whose initial ideas and contributions this package is based.
-
-
-Happy CWEBbin'!
-
-January 1, 2019.
-
-Andreas Scherer
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
diff --git a/web/c_cpp/cwebbin/README.md b/web/c_cpp/cwebbin/README.md
deleted file mode 100644
index 245a1a232c..0000000000
--- a/web/c_cpp/cwebbin/README.md
+++ /dev/null
@@ -1,58 +0,0 @@
-# literate programming in ansi-c/c++
-
-*cwebbin* is the ansi-c/c++ implementation of silvio levy's and donald e.
-knuth's [cweb system](http://www-cs-faculty.stanford.edu/~uno/cweb.html) and
-donald e. knuth's [ctwill program](ftp://ftp.cs.stanford.edu/pub/ctwill). it
-requires the contents of [the original source
-drop](http://mirrors.ctan.org/web/c_cpp/cweb/cweb.tar.gz) and [the secondary
-source drop](ftp://ftp.cs.stanford.edu/pub/ctwill/ctwill.tar.gz), to which it
-applies a set of change files to fix warnings issued by modern c/c++ compilers
-and to introduce advanced features. see the extensive [readme](README.txt) for
-the full story.
-
-extract *cwebbin-2019.tar.gz* and add the contents of *cweb-3.64c.tar.gz* and
-*ctwill.tar.gz* for the full set of source files.  unix/linux users should work
-with [make -f Makefile.unix](Makefile.unix) exclusively (targets ‘boot,’
-‘cautiously,’ and ‘all’).
-
-## advanced packaging
-
-alternatively, you may want to use *rpmbuild* or *debbuild* for compiling the
-sources and for creating installable packages in *rpm* and *deb* format. clone
-[cweb](https://github.com/ascherer/cweb) and
-[cwebbin](https://github.com/ascherer/cwebbin), create the source drops with
-```
-git archive -o cweb-3.64c.tar.gz cweb-3.64c
-git archive -o cwebbin-2019.tar.gz cwebbin-2019
-```
-respectively, put these two tarballs and the original *ctwill.tar.gz* in the
-*SOURCES* directory and *cwebbin.spec* in the *SPECS* directory of your build
-arena, and run
-```
-rpmbuild -ba SPECS/cwebbin.spec
-debbuild -ba SPECS/cwebbin.spec
-```
-depending on your preferences.
-
-## plain vanilla cweb
-
-if all you want is the original cweb without any add-ons but minus heaps of
-compiler warnings, use the special option `--with ansi_only` to include only
-the minimal changes required for a clean compilation.
-```
-rpmbuild -ba SPECS/cwebbin.spec --with ansi_only
-debbuild -ba SPECS/cwebbin.spec --with ansi_only
-```
-
-## cweb for texlive
-
-the extended sources and the build system were modified to smoothly integrate
-with the [texlive build system](https://github.com/TeX-Live/texlive-source). by invoking
-```
-debbuild -bi SPECS/cwebbin.spec --with texlive
-```
-you receive a small tarball `cweb-texlive.tar.gz`, which should be extracted in
-texlive's source directory `texk/web2c/cwebdir`. this tarball contains
-`*-w2c.ch` files that modify the original cweb sources for the texlive
-ecosystem.  additionally, it contains language catalogs, tex macros, and cweb
-include files.