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1 | Installation Instructions |
2 | ************************* | |
3 | ||
4 | Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005, | |
5 | 2006, 2007 Free 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 | Briefly, the shell commands `./configure; make; make install' should | |
14 | configure, build, and install this package. The following | |
15 | more-detailed instructions are generic; see the `README' file for | |
16 | instructions specific to this package. | |
17 | ||
18 | The `configure' shell script attempts to guess correct values for | |
19 | various system-dependent variables used during compilation. It uses | |
20 | those values to create a `Makefile' in each directory of the package. | |
21 | It may also create one or more `.h' files containing system-dependent | |
22 | definitions. Finally, it creates a shell script `config.status' that | |
23 | you can run in the future to recreate the current configuration, and a | |
24 | file `config.log' containing compiler output (useful mainly for | |
25 | debugging `configure'). | |
26 | ||
27 | It can also use an optional file (typically called `config.cache' | |
28 | and enabled with `--cache-file=config.cache' or simply `-C') that saves | |
29 | the results of its tests to speed up reconfiguring. Caching is | |
30 | disabled by default to prevent problems with accidental use of stale | |
31 | cache files. | |
32 | ||
33 | If you need to do unusual things to compile the package, please try | |
34 | to figure out how `configure' could check whether to do them, and mail | |
35 | diffs or instructions to the address given in the `README' so they can | |
36 | be considered for the next release. If you are using the cache, and at | |
37 | some point `config.cache' contains results you don't want to keep, you | |
38 | may remove or edit it. | |
39 | ||
40 | The file `configure.ac' (or `configure.in') is used to create | |
41 | `configure' by a program called `autoconf'. You need `configure.ac' if | |
42 | you want to change it or regenerate `configure' using a newer version | |
43 | of `autoconf'. | |
44 | ||
45 | The simplest way to compile this package is: | |
46 | ||
47 | 1. `cd' to the directory containing the package's source code and type | |
48 | `./configure' to configure the package for your system. | |
49 | ||
50 | Running `configure' might take a while. While running, it prints | |
51 | some 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 | 6. Often, you can also type `make uninstall' to remove the installed | |
71 | files again. | |
72 | ||
73 | Compilers and Options | |
74 | ===================== | |
75 | ||
76 | Some systems require unusual options for compilation or linking that the | |
77 | `configure' script does not know about. Run `./configure --help' for | |
78 | details on some of the pertinent environment variables. | |
79 | ||
80 | You can give `configure' initial values for configuration parameters | |
81 | by setting variables in the command line or in the environment. Here | |
82 | is an example: | |
83 | ||
84 | ./configure CC=c99 CFLAGS=-g LIBS=-lposix | |
85 | ||
86 | *Note Defining Variables::, for more details. | |
87 | ||
88 | Compiling For Multiple Architectures | |
89 | ==================================== | |
90 | ||
91 | You can compile the package for more than one kind of computer at the | |
92 | same time, by placing the object files for each architecture in their | |
93 | own directory. To do this, you can use GNU `make'. `cd' to the | |
94 | directory where you want the object files and executables to go and run | |
95 | the `configure' script. `configure' automatically checks for the | |
96 | source code in the directory that `configure' is in and in `..'. | |
97 | ||
98 | With a non-GNU `make', it is safer to compile the package for one | |
99 | architecture at a time in the source code directory. After you have | |
100 | installed the package for one architecture, use `make distclean' before | |
101 | reconfiguring for another architecture. | |
102 | ||
103 | Installation Names | |
104 | ================== | |
105 | ||
106 | By default, `make install' installs the package's commands under | |
107 | `/usr/local/bin', include files under `/usr/local/include', etc. You | |
108 | can specify an installation prefix other than `/usr/local' by giving | |
109 | `configure' the option `--prefix=PREFIX'. | |
110 | ||
111 | You can specify separate installation prefixes for | |
112 | architecture-specific files and architecture-independent files. If you | |
113 | pass the option `--exec-prefix=PREFIX' to `configure', the package uses | |
114 | PREFIX as the prefix for installing programs and libraries. | |
115 | Documentation and other data files still use the regular prefix. | |
116 | ||
117 | In addition, if you use an unusual directory layout you can give | |
118 | options like `--bindir=DIR' to specify different values for particular | |
119 | kinds of files. Run `configure --help' for a list of the directories | |
120 | you can set and what kinds of files go in them. | |
121 | ||
122 | If the package supports it, you can cause programs to be installed | |
123 | with an extra prefix or suffix on their names by giving `configure' the | |
124 | option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. | |
125 | ||
126 | Optional Features | |
127 | ================= | |
128 | ||
129 | Some packages pay attention to `--enable-FEATURE' options to | |
130 | `configure', where FEATURE indicates an optional part of the package. | |
131 | They may also pay attention to `--with-PACKAGE' options, where PACKAGE | |
132 | is something like `gnu-as' or `x' (for the X Window System). The | |
133 | `README' should mention any `--enable-' and `--with-' options that the | |
134 | package recognizes. | |
135 | ||
136 | For packages that use the X Window System, `configure' can usually | |
137 | find the X include and library files automatically, but if it doesn't, | |
138 | you can use the `configure' options `--x-includes=DIR' and | |
139 | `--x-libraries=DIR' to specify their locations. | |
140 | ||
141 | Specifying the System Type | |
142 | ========================== | |
143 | ||
144 | There may be some features `configure' cannot figure out automatically, | |
145 | but needs to determine by the type of machine the package will run on. | |
146 | Usually, assuming the package is built to be run on the _same_ | |
147 | architectures, `configure' can figure that out, but if it prints a | |
148 | message saying it cannot guess the machine type, give it the | |
149 | `--build=TYPE' option. TYPE can either be a short name for the system | |
150 | type, such as `sun4', or a canonical name which has the form: | |
151 | ||
152 | CPU-COMPANY-SYSTEM | |
153 | ||
154 | where SYSTEM can have one of these forms: | |
155 | ||
156 | OS KERNEL-OS | |
157 | ||
158 | See the file `config.sub' for the possible values of each field. If | |
159 | `config.sub' isn't included in this package, then this package doesn't | |
160 | need to know the machine type. | |
161 | ||
162 | If you are _building_ compiler tools for cross-compiling, you should | |
163 | use the option `--target=TYPE' to select the type of system they will | |
164 | produce code for. | |
165 | ||
166 | If you want to _use_ a cross compiler, that generates code for a | |
167 | platform different from the build platform, you should specify the | |
168 | "host" platform (i.e., that on which the generated programs will | |
169 | eventually be run) with `--host=TYPE'. | |
170 | ||
171 | Sharing Defaults | |
172 | ================ | |
173 | ||
174 | If you want to set default values for `configure' scripts to share, you | |
175 | can create a site shell script called `config.site' that gives default | |
176 | values for variables like `CC', `cache_file', and `prefix'. | |
177 | `configure' looks for `PREFIX/share/config.site' if it exists, then | |
178 | `PREFIX/etc/config.site' if it exists. Or, you can set the | |
179 | `CONFIG_SITE' environment variable to the location of the site script. | |
180 | A warning: not all `configure' scripts look for a site script. | |
181 | ||
182 | Defining Variables | |
183 | ================== | |
184 | ||
185 | Variables not defined in a site shell script can be set in the | |
186 | environment passed to `configure'. However, some packages may run | |
187 | configure again during the build, and the customized values of these | |
188 | variables may be lost. In order to avoid this problem, you should set | |
189 | them in the `configure' command line, using `VAR=value'. For example: | |
190 | ||
191 | ./configure CC=/usr/local2/bin/gcc | |
192 | ||
193 | causes the specified `gcc' to be used as the C compiler (unless it is | |
194 | overridden in the site shell script). | |
195 | ||
196 | Unfortunately, this technique does not work for `CONFIG_SHELL' due to | |
197 | an Autoconf bug. Until the bug is fixed you can use this workaround: | |
198 | ||
199 | CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash | |
200 | ||
201 | `configure' Invocation | |
202 | ====================== | |
203 | ||
204 | `configure' recognizes the following options to control how it operates. | |
205 | ||
206 | `--help' | |
207 | `-h' | |
208 | Print a summary of the options to `configure', and exit. | |
209 | ||
210 | `--version' | |
211 | `-V' | |
212 | Print the version of Autoconf used to generate the `configure' | |
213 | script, and exit. | |
214 | ||
215 | `--cache-file=FILE' | |
216 | Enable the cache: use and save the results of the tests in FILE, | |
217 | traditionally `config.cache'. FILE defaults to `/dev/null' to | |
218 | disable caching. | |
219 | ||
220 | `--config-cache' | |
221 | `-C' | |
222 | Alias for `--cache-file=config.cache'. | |
223 | ||
224 | `--quiet' | |
225 | `--silent' | |
226 | `-q' | |
227 | Do not print messages saying which checks are being made. To | |
228 | suppress all normal output, redirect it to `/dev/null' (any error | |
229 | messages will still be shown). | |
230 | ||
231 | `--srcdir=DIR' | |
232 | Look for the package's source code in directory DIR. Usually | |
233 | `configure' can determine that directory automatically. | |
234 | ||
235 | `configure' also accepts some other, not widely useful, options. Run | |
236 | `configure --help' for more details. | |
237 |