September 2008 This directory contains change files for Donald E. Knuth's suite of TeX related programs. The change files (.ch) and Don Knuth's WEB files (.web) from March 2008 are the key components of a construction kit for "TeX-GPC"---a TeX system which is based on the GNU Pascal compiler and runs in a Unix environment. It's smaller, less configurable and therefore easier to master than other TeX distributions. These building bricks are glued together by shell scripts in the---guess where---shell subdirectory. The MF directory contains shell scripts for installing fonts (xxxfonts), and two subdirectories kd und iby that serve as examples on how to install fonts with TeX-GPC. These are polytonic ancient Greek fonts suited for the scholar but not for modern Greek. The mp directory helps to include John Hobby's MetaPost in TeX-GPC. MetaPost lets you define pictures to be included in your TeX document. The directories dvipsnk and xdvi help to add Tom Rokiciki's dvips and Paul Vojta's xdvi. I was somewhat intrigued while building TeX from its sources, since some of these depend on others to be built and installed. Knuth wrote these programs in the WEB language (WEB is only remotely related to the last W from CERN's WWW). WEB programs are converted to Pascal sources by tangle and to a TeX input file by weave. Of course, tangle and weave are WEB programs as well. So one needs tangle to build tangle---and weave and TeX to read a beautifully typeset WEB program. But don't despair, I cut this indefinite recursion and provided tangle.p, the Pascal source of tangle, and tex.pdf. It shows what, why and how I changed Knuth's program. see http://wwwlehre.ba-stuttgart.de/~helbig/tex-gpc/tex.pdf Preparation: =========== Make sure your system is a Unix alike: if your file path names start with something like "C:\Dokumente und Einstellungen" it is not. I took NetBSD 3.0 and the latest stable version of GNU Pascal, which is 2.1, from the NetBSD package gpc-2.1nb3. Luis Rivera successfully built TeX-GPC under CYGWIN with GPC 3.4.4 and found out that newer versions of GPC expect the parameter type "cinteger" instead of "integer" in a certain function. Change the WEB macro "gpc_integer" in tex.ch and mf.ch accordingly. Overview: ========= File formats and their documentation: ------------------------------------- WEB files: .web WEB programs, "The WEB System of Structured Documentation" (webman.tex) .ch Change files for WEB programs (patches to be applied to .web files) .p GNU Pascal source .pool String pool, contains the string constants of a WEB program. METAFONT files: .mf METAFONT source, "The METAFONTbook" (mfbook.tex) .base Base file, a compact representation of METAFONT's memory. .tfm TeX font metric, "TeX: The Program" (tex.web) part 30 .nnngf generic font file, "METAFONT: The Program" (mf.web), part 46 .nnnpk packed font file, gftopk.web, modules 21-36 The last two are bitmap font formats, where nnn is a number that stands for "dots per inch". The number equals resolution of the output device as specified in your mode times the magnification. TeX files: .tex TeX source, "The TeXbook" (texbook.tex) .fmt Format file, a compact representation of TeX's memory. contains the string pool (tex.pool) and preloaded .tfm files. .dvi device independent file, "TeX: The Program" (tex.web), part 31 Files and their processors: -------------------------- WEB: tangle .web, .ch --------> .p, .pool gpc .p --------> a.out tgl .web, .ch --------> a.out (linking the last two steps) weave .web, .ch --------> .tex (Description of the program) wve .web, .ch --------> .dvi (linking the above step and tex) METAFONT: inimf plain.mf --------> plain.base mf .mf --------> .nnngf, .nnntfm gftopk .nnngf --------> .nnnpk mkfont .mf --------> TeXfonts/.tfm, PKfonts/.nnnpk mkpkfont .mf --------> PKfonts/.nnnpk TeX: initex .tfm, plain.tex --------> plain.fmt tex [ .tfm ], .tex --------> .dvi DVI drivers: dvips .dvi, .nnnpk --------> .ps, PostScript printer xdvi .dvi, .nnnpk --------> X-Window File names: ----------- TeX-GPC searches files in directories which are local to the working directory: TeXinputs .tex TeXfonts .tfm TeXformats .pool, .fmt MFinputs .mf MFbases .pool, .base PKfonts .nnnpk DVIPSconf .pro, .ps, .map (Header and configuration files for dvips) I created one set of "master directories" and used symbolic links to my working directory like: ln -s ~/TeXformats . The scripts mk_TeX_dir and mk_MF_dir help to prepare a directory for running TeX resp. METAFONT. Adapt these scripts to the locations of your master directories. TeX-GPC's path searching applies to file names without directory components, i.e. without a /: .tex local directory and then TeXinputs .mf local directory and then MFinputs .tfm TeXfonts Depending on the context, TeX-GPC programs append ".mf", ".tex", or ".tfm" to file names wihtout extensions. builtin file names: ------------------ TeXformats/tex.pool string pool for tex, (in initex) MFbases/mf.pool string pool for mf, (in inimf) TeXformats/plain.fmt format file for Plain TeX, (in tex) MFbases/plain.base base file for Plain METAFONT, (in mf) Fonts in TeX-GPC: ---------------- For each font TeX needs one .tfm file. For each font and resolution/magnification the DVI drivers need one .nnnpk file. The script mkfont will install both a .tfm and an .nnnpk file, the script mkpkfont will install an .nnnpk file only. You specify the resolution in your METAFONT mode and the magnification as an optional second argument to mkpkfont or mkfont. The DVI drivers will invoke mkpkfont automatically to create missing .nnnpk files. Running TeX-GPC =============== Missing files ------------- Search missing macro files like (webmac.tex) in Knuth's lib directory and copy them to the working directory or to TeXinputs. My change files import webmac-gpc.tex; move it to TeXinputs. Search the sources of missing fonts in the lib directory (.mf), and use the scripts mkfont or mkpkfont to create and install .tfm files respective .pk files. The shell scripts assume the METAFONT mode localfont which is defined in MF/local.mf. Remember, you've loaded local.mf into the file plain.base. Or you might want to grep for font assignments in your .tex files. The command line grep '\\font.*=' plain.tex > plainfonts creates a list of the font names used by plain.tex. I edited plainfonts to convert it to a shell script that creates all fonts of the plain format. In the MF directory you'll find other examples. Installing new fonts from CTAN ------------------------------ The directory MF/iby contains instructions on how to install a font from CTAN, in this case ibygrk to typeset polytonic ancient Greek. Printing the documentation -------------------------- The weave program generates an xxx.tex file from an xxx.web file and a possibly empty change file. Use tex to generate an xxx.dvi file. This is done by the script wve. For example, to view the description of TeX-GPC, use wve tex.web tex.ch && xdvi tex The web-macros need another font. Use webfonts to install it. The scripts texwebfonts installs additional fonts for tex.tex, and mfwebfonts for mf.tex. TRIP TRAP --------- Both tests might not be passed by TeX-GPC: TeX and METAFONT trim trailing spaces from input lines for compatibility with IBM's punched cards. TeX-GPC's programs don't. Installing TeX-GPC: =================== Get Knuth's source files: ------------------------ Make a stage directory, say tex-gpc, which mirrors Knuth's distribution from ftp://ftp.dante.de/pub/tex/systems/knuth/dist This gives you the WEB files, manuals, macros and some .mf files. At least you need the directories lib, tex, mfware, mf and web. You need another set of source files, namely the METAFONT source files (.mf) for Knuth's font Computer Modern. Copy the .mf files from ftp://ftp.dante.de/pub/tex/fonts/cm/mf/ to MFinputs. I prefer the DANTE server, because that server preserves modification times. This is not true with other CTAN mirrors. Building from WEB sources, (xxx.web and xxx.ch --> xxx, xxx.pool) ---------------------------------------------------------------- The general procedure to build a binary xxx from its WEB files is: Move xxx.ch to the directory that contains xxx.web, apply tangle to xxx.web and xxx.ch to generate xxx.p and xxx.pool, and compile the Pascal source with gpc. The command line tgl xxx.web xxx.ch will do all that. It produces an a.out file that should be moved to your binary directory as xxx. ("binary directory" means a directory in your PATH.) Step by step procedure to bootstrap TeX-GPC ------------------------------------------- 0. Make tangle tangle.p --> tangle ------------------------------------------------------------------------ Compile tangle.p (gpc tangle.p) and move a.out as tangle to your binary directory. 1. Make inimf and initex ------------------------------------------------------------------------ mf.web, mf.ch --> inimf, MFBases/mf.pool tex.web, tex.ch --> initex, TeXformats/tex.pool Build the ini-programs and save them as initex, resp. inimf. Move tex.pool to TeXformats and mf.pool to MFbases. If you get an error message like ! MF.POOL doesn't match; TANGLE me again. you probably forgot to move mf.pool to MFbases (like I do regularly), so don't tangle around but move around. 2. Make plain.base ../lib/plain.mf --> MFbases/plain.base ------------------------------------------------------------------------ Go to the directory tex-gpc/mf and use inimf to create plain.base. The file local.mf contains mode definitions for my HP LaserJet 1320 printer. Adapt local.mf to your printer and then type inimf ../lib/plain input ../MF/local dump Move plain.base to MFbases. 3. Make mf mf.web, mf.ch --> mf ------------------------------------------------------------------------ Edit mf and look for the string @x inimf that introduces a change block. This change block is commented out, since it is shifted right. Shift left this block to uncomment it. This way mf.ch is changed to build a production version. 4. Make gftopk gftopk.web, gftopk.ch --> gftopk ------------------------------------------------------------------------ Build gftopk in the mfware directory. You need gftopk to install packed font files (.nnnpk) in the next step. 5. Install fonts: MFinputs/*.mf --> TeXfonts/*.tfm, PKfonts/*.pk ------------------------------------------------------------------------ Prepare tex-gpc to run both METAFONT (mk_MF_dir) and TeX (mk_TeX_dir) and run the shell script plainfonts from there. 6. Make plain.fmt ../lib/plain.tex --> TeXformats/plain.fmt ------------------------------------------------------------------------ Go to the directory tex-gpc/tex to build plain.fmt. This command line will do initex ../lib/plain \\dump Move plain.fmt to TeXformats. 7. Finally build tex tex.web, tex.ch --> tex ------------------------------------------------------------------------ Change tex.ch for production, and build it with tgl. Enjoy, Wolfgang Helbig, Programmierer Comments welcome: helbig aet lehre dot ba-stuttgart dot de TeX is a trademark of the American Mathematical Society. METAFONT is a trademark of Addison Wesley Publishing Company.