1
Installation Instructions
2
*************************
4
Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005 Free
5
Software Foundation, Inc.
7
This file is free documentation; the Free Software Foundation gives
8
unlimited permission to copy, distribute and modify it.
13
These are generic installation instructions.
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').
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
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.
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'.
42
The simplest way to compile this package is:
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
50
Running `configure' takes awhile. While running, it prints some
51
messages telling which features it is checking for.
53
2. Type `make' to compile the package.
55
3. Optionally, type `make check' to run any self-tests that come with
58
4. Type `make install' to install the programs and any data files and
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.
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.
77
You can give `configure' initial values for configuration parameters
78
by setting variables in the command line or in the environment. Here
81
./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
83
*Note Defining Variables::, for more details.
85
Compiling For Multiple Architectures
86
====================================
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 `..'.
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.
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'.
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.
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.
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'.
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
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.
140
Specifying the System Type
141
==========================
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:
153
where SYSTEM can have one of these forms:
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.
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
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'.
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.
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:
190
./configure CC=/usr/local2/bin/gcc
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:
195
/bin/bash ./configure CONFIG_SHELL=/bin/bash
197
Here the `CONFIG_SHELL=/bin/bash' operand causes subsequent
198
configuration-related scripts to be executed by `/bin/bash'.
200
`configure' Invocation
201
======================
203
`configure' recognizes the following options to control how it operates.
207
Print a summary of the options to `configure', and exit.
211
Print the version of Autoconf used to generate the `configure'
215
Enable the cache: use and save the results of the tests in FILE,
216
traditionally `config.cache'. FILE defaults to `/dev/null' to
221
Alias for `--cache-file=config.cache'.
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).
231
Look for the package's source code in directory DIR. Usually
232
`configure' can determine that directory automatically.
234
`configure' also accepts some other, not widely useful, options. Run
235
`configure --help' for more details.