% This file is part of CWEB. % 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 last updated May 2021 by Andreas Scherer % Copyright (C) 1987,1990,1993,2000,2016 Silvio Levy and Donald E. Knuth % 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. to email@example.com, and people % there will verify and forward bug reports. % % DEK takes no responsibility for the changefiles; they should be % maintained independently. He even transferred the job to correct errors % in ctangle.w, cweave.w, prod.w, common.w, cwebmac.tex, cwebman.tex, % and in the files of examples/*.w to Andreas Scherer in 2021. % Further significant developments, including versions that neither % Don Knuth nor Silvio Levy themselves do maintain, are ongoing. % All of the really current news about CWEB is, in fact, now to be found % on the CWEB development page https://github.com/ascherer/cweb. This directory contains the following files: Makefile README comm-amiga.ch comm-bs.ch comm-mac.ch comm-man.ch comm-os2.ch comm-pc.ch comm-ql.ch comm-vms.ch comm-w32.ch common.c common.h common.w ctang-bs.ch ctang-man.ch ctang-pc.ch ctang-ql.ch ctang-vms.ch ctang-w32.ch ctangle.c ctangle.w cweav-bs.ch cweav-man.ch cweav-pc.ch cweav-ql.ch cweav-vms.ch cweave-w32.ch cweave.w cweb.1 cweb.el cwebmac.tex cwebman.tex examples/ makefile.bs prod.w readme.ql c++lib.w iso_types.w The file cwebman.tex is the user manual. The examples directory contains additional examples of the use of CWEB. The files common.c and ctangle.c are used for bootstrapping. The file cweb.1 is a manual page. The file cweb.el is suggested for GNU-Emacs users. The files c++lib.w and iso_types.w are for C++ users (say `@i c++lib.w' and/or `@i iso_types.w' at beginning of program). The files *-man.ch are used if you want to make the full 243-page CWEB manual. The files *-bs.ch are used instead of *-pc.ch if you are doing BIG programs. You can use makefile.bs to make CWEB with *-bs.ch. The files *-ql.ch are for QDOS/SMSQ systems; see readme.ql for further info. The files *-w32.ch use __fastcall conventions on win32 systems. The file comm-mac.ch is for Macintosh conventions. The other files named *.ch are sample change files for local customization. IMPORTANT: Please touch *.c before proceeding. Then edit the opening lines of Makefile so that it has the proper directory information for your local system. To make ctangle and cweave say `make all'; this should produce roughly the following actions (possibly with harmless warning messages from cc): cc -g -w -c ctangle.c cc -g -w -DCWEBINPUTS=\"/usr/local/lib/cweb\" -c common.c cc -g -o ctangle ctangle.o common.o ./ctangle cweave cc -g -w -c cweave.c cc -g -w -o cweave cweave.o common.o 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.) To install cweave and ctangle say `make install'. You probably need to be superuser to do this; but it's wise to `make all' first, BEFORE becoming superuser and saying `make install'. Note that change files for VMS, AMIGA, MAC, and PCs are provided. When you are first bootstrapping to a new system, you may need to edit common.c and ctangle.c by hand, but the vast majority of the change-file changes are minor refinements that are not necessary for a rudimentary ctangle.
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cweb – A Web system in C
The CWEB system is a system for literate programming, also known as structured software documentation, with code written in the C and C++ languages.
People have been accumulating several decades of experience with CWEB, and CTANGLE and CWEAVE are known to work reasonably well on numerous platforms. In general those programs are now entirely stable: DEK won't be changing them any more, because they've proved their value in extensive use. (Henceforth he must devote full time to “The Art of Computer Programming”!)
However, further significant developments, including versions that DEK himself does not maintain, are ongoing. All of the really current news about CWEB is, in fact, now to be found in the CWEB development project, thanks to the tireless activities of Andreas Scherer.
The first new release under his auspices incorporates the majority of material from his CWEBbin project, namely all the patches accumulated over many years, and all the changes for ANSI-C. What's left in CWEBbin are a few extensions used in TeX Live:
- includes CTWILL and its utilities
- internationalization with the “GNU gettext utilities”
- output is only written when different from the former run
- new options -l, -i, and -o for CWEAVE and CTWILL
- file lookup with the kpathsea library (TeX Live only)
and it provides tools to bundle packages for various target systems.
|Copyright|| Silvio Levy and Donald E. Knuth|
Donald E. Knuth (inactive)
Silvio Levy (inactive)
|Contained in||TeX Live as cweb|
MiKTeX as miktex-cweb-bin-2.9