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1 | Installation Instructions | ||
2 | ************************* | ||
3 | |||
4 | Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005 Free | ||
5 | Software Foundation, Inc. | ||
6 | |||
7 | This file is free documentation; the Free Software Foundation gives | ||
8 | unlimited permission to copy, distribute and modify it. | ||
9 | |||
10 | Basic Installation | ||
11 | ================== | ||
12 | |||
13 | These are generic installation instructions. | ||
14 | |||
15 | The `configure' shell script attempts to guess correct values for | ||
16 | various system-dependent variables used during compilation. It uses | ||
17 | those values to create a `Makefile' in each directory of the package. | ||
18 | It may also create one or more `.h' files containing system-dependent | ||
19 | definitions. Finally, it creates a shell script `config.status' that | ||
20 | you can run in the future to recreate the current configuration, and a | ||
21 | file `config.log' containing compiler output (useful mainly for | ||
22 | debugging `configure'). | ||
23 | |||
24 | It can also use an optional file (typically called `config.cache' | ||
25 | and enabled with `--cache-file=config.cache' or simply `-C') that saves | ||
26 | the results of its tests to speed up reconfiguring. (Caching is | ||
27 | disabled by default to prevent problems with accidental use of stale | ||
28 | cache files.) | ||
29 | |||
30 | If you need to do unusual things to compile the package, please try | ||
31 | to figure out how `configure' could check whether to do them, and mail | ||
32 | diffs or instructions to the address given in the `README' so they can | ||
33 | be considered for the next release. If you are using the cache, and at | ||
34 | some point `config.cache' contains results you don't want to keep, you | ||
35 | may remove or edit it. | ||
36 | |||
37 | The file `configure.ac' (or `configure.in') is used to create | ||
38 | `configure' by a program called `autoconf'. You only need | ||
39 | `configure.ac' if you want to change it or regenerate `configure' using | ||
40 | a newer version of `autoconf'. | ||
41 | |||
42 | The simplest way to compile this package is: | ||
43 | |||
44 | 1. `cd' to the directory containing the package's source code and type | ||
45 | `./configure' to configure the package for your system. If you're | ||
46 | using `csh' on an old version of System V, you might need to type | ||
47 | `sh ./configure' instead to prevent `csh' from trying to execute | ||
48 | `configure' itself. | ||
49 | |||
50 | Running `configure' takes awhile. While running, it prints some | ||
51 | messages telling which features it is checking for. | ||
52 | |||
53 | 2. Type `make' to compile the package. | ||
54 | |||
55 | 3. Optionally, type `make check' to run any self-tests that come with | ||
56 | the package. | ||
57 | |||
58 | 4. Type `make install' to install the programs and any data files and | ||
59 | documentation. | ||
60 | |||
61 | 5. You can remove the program binaries and object files from the | ||
62 | source code directory by typing `make clean'. To also remove the | ||
63 | files that `configure' created (so you can compile the package for | ||
64 | a different kind of computer), type `make distclean'. There is | ||
65 | also a `make maintainer-clean' target, but that is intended mainly | ||
66 | for the package's developers. If you use it, you may have to get | ||
67 | all sorts of other programs in order to regenerate files that came | ||
68 | with the distribution. | ||
69 | |||
70 | Compilers and Options | ||
71 | ===================== | ||
72 | |||
73 | Some systems require unusual options for compilation or linking that the | ||
74 | `configure' script does not know about. Run `./configure --help' for | ||
75 | details on some of the pertinent environment variables. | ||
76 | |||
77 | You can give `configure' initial values for configuration parameters | ||
78 | by setting variables in the command line or in the environment. Here | ||
79 | is an example: | ||
80 | |||
81 | ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix | ||
82 | |||
83 | *Note Defining Variables::, for more details. | ||
84 | |||
85 | Compiling For Multiple Architectures | ||
86 | ==================================== | ||
87 | |||
88 | You can compile the package for more than one kind of computer at the | ||
89 | same time, by placing the object files for each architecture in their | ||
90 | own directory. To do this, you must use a version of `make' that | ||
91 | supports the `VPATH' variable, such as GNU `make'. `cd' to the | ||
92 | directory where you want the object files and executables to go and run | ||
93 | the `configure' script. `configure' automatically checks for the | ||
94 | source code in the directory that `configure' is in and in `..'. | ||
95 | |||
96 | If you have to use a `make' that does not support the `VPATH' | ||
97 | variable, you have to compile the package for one architecture at a | ||
98 | time in the source code directory. After you have installed the | ||
99 | package for one architecture, use `make distclean' before reconfiguring | ||
100 | for another architecture. | ||
101 | |||
102 | Installation Names | ||
103 | ================== | ||
104 | |||
105 | By default, `make install' installs the package's commands under | ||
106 | `/usr/local/bin', include files under `/usr/local/include', etc. You | ||
107 | can specify an installation prefix other than `/usr/local' by giving | ||
108 | `configure' the option `--prefix=PREFIX'. | ||
109 | |||
110 | You can specify separate installation prefixes for | ||
111 | architecture-specific files and architecture-independent files. If you | ||
112 | pass the option `--exec-prefix=PREFIX' to `configure', the package uses | ||
113 | PREFIX as the prefix for installing programs and libraries. | ||
114 | Documentation and other data files still use the regular prefix. | ||
115 | |||
116 | In addition, if you use an unusual directory layout you can give | ||
117 | options like `--bindir=DIR' to specify different values for particular | ||
118 | kinds of files. Run `configure --help' for a list of the directories | ||
119 | you can set and what kinds of files go in them. | ||
120 | |||
121 | If the package supports it, you can cause programs to be installed | ||
122 | with an extra prefix or suffix on their names by giving `configure' the | ||
123 | option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. | ||
124 | |||
125 | Optional Features | ||
126 | ================= | ||
127 | |||
128 | Some packages pay attention to `--enable-FEATURE' options to | ||
129 | `configure', where FEATURE indicates an optional part of the package. | ||
130 | They may also pay attention to `--with-PACKAGE' options, where PACKAGE | ||
131 | is something like `gnu-as' or `x' (for the X Window System). The | ||
132 | `README' should mention any `--enable-' and `--with-' options that the | ||
133 | package recognizes. | ||
134 | |||
135 | For packages that use the X Window System, `configure' can usually | ||
136 | find the X include and library files automatically, but if it doesn't, | ||
137 | you can use the `configure' options `--x-includes=DIR' and | ||
138 | `--x-libraries=DIR' to specify their locations. | ||
139 | |||
140 | Specifying the System Type | ||
141 | ========================== | ||
142 | |||
143 | There may be some features `configure' cannot figure out automatically, | ||
144 | but needs to determine by the type of machine the package will run on. | ||
145 | Usually, assuming the package is built to be run on the _same_ | ||
146 | architectures, `configure' can figure that out, but if it prints a | ||
147 | message saying it cannot guess the machine type, give it the | ||
148 | `--build=TYPE' option. TYPE can either be a short name for the system | ||
149 | type, such as `sun4', or a canonical name which has the form: | ||
150 | |||
151 | CPU-COMPANY-SYSTEM | ||
152 | |||
153 | where SYSTEM can have one of these forms: | ||
154 | |||
155 | OS KERNEL-OS | ||
156 | |||
157 | See the file `config.sub' for the possible values of each field. If | ||
158 | `config.sub' isn't included in this package, then this package doesn't | ||
159 | need to know the machine type. | ||
160 | |||
161 | If you are _building_ compiler tools for cross-compiling, you should | ||
162 | use the option `--target=TYPE' to select the type of system they will | ||
163 | produce code for. | ||
164 | |||
165 | If you want to _use_ a cross compiler, that generates code for a | ||
166 | platform different from the build platform, you should specify the | ||
167 | "host" platform (i.e., that on which the generated programs will | ||
168 | eventually be run) with `--host=TYPE'. | ||
169 | |||
170 | Sharing Defaults | ||
171 | ================ | ||
172 | |||
173 | If you want to set default values for `configure' scripts to share, you | ||
174 | can create a site shell script called `config.site' that gives default | ||
175 | values for variables like `CC', `cache_file', and `prefix'. | ||
176 | `configure' looks for `PREFIX/share/config.site' if it exists, then | ||
177 | `PREFIX/etc/config.site' if it exists. Or, you can set the | ||
178 | `CONFIG_SITE' environment variable to the location of the site script. | ||
179 | A warning: not all `configure' scripts look for a site script. | ||
180 | |||
181 | Defining Variables | ||
182 | ================== | ||
183 | |||
184 | Variables not defined in a site shell script can be set in the | ||
185 | environment passed to `configure'. However, some packages may run | ||
186 | configure again during the build, and the customized values of these | ||
187 | variables may be lost. In order to avoid this problem, you should set | ||
188 | them in the `configure' command line, using `VAR=value'. For example: | ||
189 | |||
190 | ./configure CC=/usr/local2/bin/gcc | ||
191 | |||
192 | causes the specified `gcc' to be used as the C compiler (unless it is | ||
193 | overridden in the site shell script). Here is a another example: | ||
194 | |||
195 | /bin/bash ./configure CONFIG_SHELL=/bin/bash | ||
196 | |||
197 | Here the `CONFIG_SHELL=/bin/bash' operand causes subsequent | ||
198 | configuration-related scripts to be executed by `/bin/bash'. | ||
199 | |||
200 | `configure' Invocation | ||
201 | ====================== | ||
202 | |||
203 | `configure' recognizes the following options to control how it operates. | ||
204 | |||
205 | `--help' | ||
206 | `-h' | ||
207 | Print a summary of the options to `configure', and exit. | ||
208 | |||
209 | `--version' | ||
210 | `-V' | ||
211 | Print the version of Autoconf used to generate the `configure' | ||
212 | script, and exit. | ||
213 | |||
214 | `--cache-file=FILE' | ||
215 | Enable the cache: use and save the results of the tests in FILE, | ||
216 | traditionally `config.cache'. FILE defaults to `/dev/null' to | ||
217 | disable caching. | ||
218 | |||
219 | `--config-cache' | ||
220 | `-C' | ||
221 | Alias for `--cache-file=config.cache'. | ||
222 | |||
223 | `--quiet' | ||
224 | `--silent' | ||
225 | `-q' | ||
226 | Do not print messages saying which checks are being made. To | ||
227 | suppress all normal output, redirect it to `/dev/null' (any error | ||
228 | messages will still be shown). | ||
229 | |||
230 | `--srcdir=DIR' | ||
231 | Look for the package's source code in directory DIR. Usually | ||
232 | `configure' can determine that directory automatically. | ||
233 | |||
234 | `configure' also accepts some other, not widely useful, options. Run | ||
235 | `configure --help' for more details. | ||
236 | |||