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 (https://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 https://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 distfiles". 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 -ltinfo -ltinfow -lxcurses -lncursesw -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 (Windows-95, Windows-98 and Windows-NT systems only, 122 with Microsoft Visual C++, mingw, or Borland C) 123 1241. Move the distributed source to its own directory. 125 1262. If you wish, you may edit defines.wn to remove some optional features. 127 If you choose not to include some features in your version, you may 128 wish to edit the manual page less.man and the help page help.c 129 to remove the descriptions of the features which you are removing. 130 1313. If you are using Microsoft Visual C++, run "nmake -f Makefile.wnm". 132 If you are using mingw, run "make -f Makefile.wng". 133 If you are using Borland C, run "make -f Makefile.wnb". 134 135 If the environment variable SECURE_COMPILE is to 1 during the make, 136 a "secure" version of less is built, with some features disabled. 137 1384. If the make succeeds, it will generate the programs "less.exe" and 139 "lesskey.exe" in your current directory. Test the generated programs. 140 141 142 143======================================================================= 144INSTALLATION (MS-DOS systems only, 145 with Microsoft C, Borland C, or DJGPP) 146 1471. Move the distributed source to its own directory. 148 Depending on your compiler, you may need to convert the source 149 to have CR-LF rather than LF as line terminators. 150 1512. If you are using Microsoft C, rename MAKEFILE.DSU to MAKEFILE. 152 If you are using Borland C, rename MAKEFILE.DSB to MAKEFILE. 153 If you are using DJGPP, rename MAKEFILE.DSG to MAKEFILE. 154 1553. Look at MAKEFILE to make sure that the definitions for CC and LIBDIR 156 are correct. CC should be the name of your C compiler and 157 LIBDIR should be the directory where the C libraries reside (for 158 Microsoft C only). If these definitions need to be changed, you can 159 either modify the definitions directly in MAKEFILE, or set your 160 environment variables CC and/or LIBDIR to override the definitions 161 in MAKEFILE. 162 1634. If you wish, you may edit DEFINES.DS to remove some optional features. 164 If you choose not to include some features in your version, you may 165 wish to edit the manual page LESS.MAN and the help page HELP.C 166 to remove the descriptions of the features which you are removing. 167 1685. Run your "make" program and watch the fun. 169 If your "make" requires a flag to import environment variables, 170 you should use that flag. 171 If your compiler runs out of memory, try running "make -n >cmds.bat" 172 and then run cmds.bat. 173 1746. If the make succeeds, it will generate the programs "LESS.EXE" and 175 "LESSKEY.EXE" in your current directory. Test the generated programs. 176 1777. When satisfied that it works, you may wish to install LESS.EXE and 178 LESSKEY.EXE in a directory which is included in your PATH. 179 180 181 182======================================================================= 183INSTALLATION (OS/2 systems only, 184 with EMX C) 185 1861. Move the distributed source to its own directory. 187 1882. Rename Makefile.o2e to Makefile. 189 1903. Check the Makefile to make sure the definitions look ok. 191 1924. If you wish, you may edit defines.o2 to remove some optional features. 193 If you choose not to include some features in your version, you may 194 wish to edit the manual page less.man and the help page help.c 195 to remove the descriptions of the features which you are removing. 196 1975. Type "make" and watch the fun. 198 1996. If the make succeeds, it will generate the programs "less.exe" and 200 "lesskey.exe" in your current directory. Test the generated programs. 201 2027. Make sure you have the emx runtime installed. You need the emx DLLs 203 emx.dll and emxlibcs.dll and also the termcap database, termcap.dat. 204 Make sure you have termcap.dat either in the default location or 205 somewhere in a directory listed in the PATH or INIT environment 206 variables. 207 2088. When satisfied that it works, you may wish to install less.exe, 209 lesskey.exe and scrsize.exe in a directory which is included in 210 your PATH. scrsize.exe is required only if you use a terminal 211 emulator such as xterm or rxvt. 212 213 214 215======================================================================= 216INSTALLATION (OS-9 systems only, 217 with Microware C or Ultra C) 218 2191. Move the distributed source to its own directory. 220 2212. If you are using Microware C, rename Makefile.o9c to Makefile. 222 If you are using Ultra C, rename Makefile.o9u to Makefile. 223 2243. Check the Makefile to make sure the definitions look ok. 225 2264. If you wish, you may edit defines.o9 to remove some optional features. 227 If you choose not to include some features in your version, you may 228 wish to edit the manual page less.man and the help page help.c 229 to remove the descriptions of the features which you are removing. 230 2315. Type "dmake" and watch the fun. 232 The standard OS-9 "make" will probably not work. If you don't 233 have dmake, you can get a copy from os9archive.rtsi.com. 234 2356. If the make succeeds, it will generate the programs "less" and 236 "lesskey" in your current directory. Test the generated programs. 237 2387. When satisfied that it works, if you wish to install it 239 in a public place, type "dmake install". 240 See step 6 of the Unix installation instructions for details 241 on how to change the default installation directories. 242 243