1************************************************************************** 2************************************************************************** 3** ** 4** The FreeBSD Project has chosen to redistribute and modify Less under ** 5** the 'Less License' (as described in the 'LICENSE' file). ** 6** ** 7************************************************************************** 8************************************************************************** 9 10 This is the source code distribution of "less". 11 This program is part of the GNU project (http://www.gnu.org). 12 13 This program is free software. You may redistribute it and/or 14 modify it under the terms of either: 15 16 1. The GNU General Public License, as published by the Free 17 Software Foundation; either version 3, or (at your option) any 18 later version. A copy of this license is in the file COPYING. 19 or 20 2. The Less License, in the file LICENSE. 21 22 Please report any problems at https://github.com/gwsw/less/issues. 23 See https://greenwoodsoftware.com/less for the latest info. 24 Source repository is at https://github.com/gwsw/less.git. 25 26========================================================================= 27 28You should build from a clone of a git repository 29ONLY IF you are doing development on the less source itself. 30If you are merely using less as a tool, you should download a release 31from http://greenwoodsoftware.com and NOT from github. 32 33The formatted manual page is in less.man. 34The manual page nroff source is in less.nro. 35Major changes made since the last posted version are in NEWS. 36 37======================================================================= 38INSTALLATION (Unix & Linux systems only): 39 401. Move the distributed source to its own directory and unpack it, 41 if you have not already done so. 42 432. If you are building from a clone of a git repository, 44 type "make -f Makefile.aut". 45 If you are building from a numbered release package (a tar or 46 zip file with a name like less-999.tar.gz or less-999.zip downloaded 47 from greenwoodsoftware.com, not from github), you should skip this step. 48 493. Type "sh configure". 50 This will generate a Makefile and a defines.h. 51 Warning: if you have a GNU sed, make sure it is version 2.05 or later. 52 53 The file INSTALL describes the usage of the configure program in 54 general. In addition, these options to configure are supported: 55 56 --with-editor=program 57 Specifies the default editor program used by the "v" command. 58 The default is "vi". 59 60 --with-regex=lib 61 Specifies the regular expression library used by less for pattern 62 matching. The default is "auto", which means the configure program 63 finds a regular expression library automatically. Other values are: 64 gnu Use the GNU regex library. 65 pcre Use the PCRE library. 66 pcre2 Use the PCRE2 library. 67 posix Use the POSIX-compatible regcomp. 68 regcmp Use the regcmp library. 69 re_comp Use the re_comp library. 70 regcomp Use the V8-compatible regcomp. 71 regcomp-local Use Henry Spencer's V8-compatible regcomp 72 (source is supplied with less). 73 none No regular expressions, only simple string matching. 74 75 --with-secure 76 Builds a "secure" version of less, with some features disabled 77 to prevent users from viewing other files, accessing shell 78 commands, etc. 79 80 814. It is a good idea to look over the generated Makefile and defines.h 82 and make sure they look ok. If you know of any peculiarities of 83 your system that configure might not have detected, you may fix the 84 Makefile now. Take particular notice of the list of "terminal" 85 libraries in the LIBS definition in the Makefile; these may need 86 to be edited. The terminal libraries will be some subset of 87 -lncurses -lcurses -ltermcap -ltermlib 88 89 If you wish, you may edit defines.h to remove some optional features. 90 If you choose not to include some features in your version, you may 91 wish to edit the manual page "less.nro" and the help page "less.hlp" 92 to remove the descriptions of the features which you are removing. 93 If you edit less.hlp, you should run "make -f Makefile.aut help.c". 94 955. Type "make" and watch the fun. 96 976. If the make succeeds, it will generate the programs "less", 98 "lesskey" and "lessecho" in your current directory. Test the 99 generated programs. 100 1017. When satisfied that it works, if you wish to install it 102 in a public place, type "make install". 103 104 The default install destinations are: 105 Executables (less, lesskey, lessecho) in /usr/local/bin 106 Documentation (less.nro, lesskey.nro) in /usr/local/man/man1 107 If you want to install any of these files elsewhere, define 108 bindir and/or mandir to the appropriate directories. 109 110 111Note to hackers: comments noting possible improvements are enclosed 112in double curly brackets {{ like this }}. 113 114(Note that the above note was originally written at a time when 115"hackers" most commonly meant "enthusiastic and dedicated computer 116programmers", not "persons who attempt to circumvent computer security".) 117 118 119 120======================================================================= 121INSTALLATION (MS-DOS systems only, 122 with Microsoft C, Borland C, or DJGPP) 123 1241. Move the distributed source to its own directory. 125 Depending on your compiler, you may need to convert the source 126 to have CR-LF rather than LF as line terminators. 127 1282. If you are using Microsoft C, rename MAKEFILE.DSU to MAKEFILE. 129 If you are using Borland C, rename MAKEFILE.DSB to MAKEFILE. 130 If you are using DJGPP, rename MAKEFILE.DSG to MAKEFILE. 131 1323. Look at MAKEFILE to make sure that the definitions for CC and LIBDIR 133 are correct. CC should be the name of your C compiler and 134 LIBDIR should be the directory where the C libraries reside (for 135 Microsoft C only). If these definitions need to be changed, you can 136 either modify the definitions directly in MAKEFILE, or set your 137 environment variables CC and/or LIBDIR to override the definitions 138 in MAKEFILE. 139 1404. If you wish, you may edit DEFINES.DS to remove some optional features. 141 If you choose not to include some features in your version, you may 142 wish to edit the manual page LESS.MAN and the help page HELP.C 143 to remove the descriptions of the features which you are removing. 144 1455. Run your "make" program and watch the fun. 146 If your "make" requires a flag to import environment variables, 147 you should use that flag. 148 If your compiler runs out of memory, try running "make -n >cmds.bat" 149 and then run cmds.bat. 150 1516. If the make succeeds, it will generate the programs "LESS.EXE" and 152 "LESSKEY.EXE" in your current directory. Test the generated programs. 153 1547. When satisfied that it works, you may wish to install LESS.EXE and 155 LESSKEY.EXE in a directory which is included in your PATH. 156 157 158 159======================================================================= 160INSTALLATION (Windows-95, Windows-98 and Windows-NT systems only, 161 with Borland C or Microsoft Visual C++) 162 1631. Move the distributed source to its own directory. 164 1652. If you are using Borland C, rename Makefile.wnb to Makefile. 166 If you are using Microsoft Visual C++, rename Makefile.wnm to Makefile. 167 1683. Check the Makefile to make sure the definitions look ok. 169 1704. If you wish, you may edit defines.wn to remove some optional features. 171 If you choose not to include some features in your version, you may 172 wish to edit the manual page less.man and the help page help.c 173 to remove the descriptions of the features which you are removing. 174 1755. Type "make" and watch the fun. 176 1776. If the make succeeds, it will generate the programs "less.exe" and 178 "lesskey.exe" in your current directory. Test the generated programs. 179 1807. When satisfied that it works, if you wish to install it 181 in a public place, type "make install". 182 See step 6 of the Unix installation instructions for details 183 on how to change the default installation directories. 184 185 186 187======================================================================= 188INSTALLATION (OS/2 systems only, 189 with EMX C) 190 1911. Move the distributed source to its own directory. 192 1932. Rename Makefile.o2e to Makefile. 194 1953. Check the Makefile to make sure the definitions look ok. 196 1974. If you wish, you may edit defines.o2 to remove some optional features. 198 If you choose not to include some features in your version, you may 199 wish to edit the manual page less.man and the help page help.c 200 to remove the descriptions of the features which you are removing. 201 2025. Type "make" and watch the fun. 203 2046. If the make succeeds, it will generate the programs "less.exe" and 205 "lesskey.exe" in your current directory. Test the generated programs. 206 2077. Make sure you have the emx runtime installed. You need the emx DLLs 208 emx.dll and emxlibcs.dll and also the termcap database, termcap.dat. 209 Make sure you have termcap.dat either in the default location or 210 somewhere in a directory listed in the PATH or INIT environment 211 variables. 212 2138. When satisfied that it works, you may wish to install less.exe, 214 lesskey.exe and scrsize.exe in a directory which is included in 215 your PATH. scrsize.exe is required only if you use a terminal 216 emulator such as xterm or rxvt. 217 218 219 220======================================================================= 221INSTALLATION (OS-9 systems only, 222 with Microware C or Ultra C) 223 2241. Move the distributed source to its own directory. 225 2262. If you are using Microware C, rename Makefile.o9c to Makefile. 227 If you are using Ultra C, rename Makefile.o9u to Makefile. 228 2293. Check the Makefile to make sure the definitions look ok. 230 2314. If you wish, you may edit defines.o9 to remove some optional features. 232 If you choose not to include some features in your version, you may 233 wish to edit the manual page less.man and the help page help.c 234 to remove the descriptions of the features which you are removing. 235 2365. Type "dmake" and watch the fun. 237 The standard OS-9 "make" will probably not work. If you don't 238 have dmake, you can get a copy from os9archive.rtsi.com. 239 2406. If the make succeeds, it will generate the programs "less" and 241 "lesskey" in your current directory. Test the generated programs. 242 2437. When satisfied that it works, if you wish to install it 244 in a public place, type "dmake install". 245 See step 6 of the Unix installation instructions for details 246 on how to change the default installation directories. 247 248======================================================================= 249ACKNOWLEDGMENTS: 250 Some versions of the less distribution are packaged using 251 Info-ZIP's compression utility. 252 Info-ZIP's software is free and can be obtained as source 253 code or executables from various anonymous-ftp sites, 254 including ftp.uu.net:/pub/archiving/zip. 255