4 These are generic installation instructions.
6 The `configure' shell script attempts to guess correct values for
7 various system-dependent variables used during compilation. It uses
8 those values to create a `Makefile' in each directory of the package.
9 It may also create one or more `.h' files containing system-dependent
10 definitions. Finally, it creates a shell script `config.status' that
11 you can run in the future to recreate the current configuration, a file
12 `config.cache' that saves the results of its tests to speed up
13 reconfiguring, and a file `config.log' containing compiler output
14 (useful mainly for debugging `configure').
16 If you need to do unusual things to compile the package, please try
17 to figure out how `configure' could check whether to do them, and mail
18 diffs or instructions to the address given in the `README' so they can
19 be considered for the next release. If at some point `config.cache'
20 contains results you don't want to keep, you may remove or edit it.
22 The file `configure.in' is used to create `configure' by a program
23 called `autoconf'. You only need `configure.in' if you want to change
24 it or regenerate `configure' using a newer version of `autoconf'.
26 The simplest way to compile this package is:
28 1. `cd' to the directory containing the package's source code and type
29 `./configure' to configure the package for your system. If you're
30 using `csh' on an old version of System V, you might need to type
31 `sh ./configure' instead to prevent `csh' from trying to execute
34 Running `configure' takes a while. While running, it prints some
35 messages telling which features it is checking for.
37 2. Type `make' to compile the package.
39 3. Optionally, type `make check' to run any self-tests that come with
42 4. Type `make install' to install the programs and any data files and
45 5. You can remove the program binaries and object files from the
46 source code directory by typing `make clean'. To also remove the
47 files that `configure' created (so you can compile the package for
48 a different kind of computer), type `make distclean'. There is
49 also a `make maintainer-clean' target, but that is intended mainly
50 for the package's developers. If you use it, you may have to get
51 all sorts of other programs in order to regenerate files that came
52 with the distribution.
57 Some systems require unusual options for compilation or linking that
58 the `configure' script does not know about. You can give `configure'
59 initial values for variables by setting them in the environment. Using
60 a Bourne-compatible shell, you can do that on the command line like
62 CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
64 Or on systems that have the `env' program, you can do it like this:
65 env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
67 Compiling For Multiple Architectures
68 ====================================
70 You can compile the package for more than one kind of computer at the
71 same time, by placing the object files for each architecture in their
72 own directory. To do this, you must use a version of `make' that
73 supports the `VPATH' variable, such as GNU `make'. `cd' to the
74 directory where you want the object files and executables to go and run
75 the `configure' script. `configure' automatically checks for the
76 source code in the directory that `configure' is in and in `..'.
78 If you have to use a `make' that does not supports the `VPATH'
79 variable, you have to compile the package for one architecture at a time
80 in the source code directory. After you have installed the package for
81 one architecture, use `make distclean' before reconfiguring for another
87 By default, `make install' will install the package's files in
88 `/usr/local/bin', `/usr/local/man', etc. You can specify an
89 installation prefix other than `/usr/local' by giving `configure' the
90 option `--prefix=PATH'.
92 You can specify separate installation prefixes for
93 architecture-specific files and architecture-independent files. If you
94 give `configure' the option `--exec-prefix=PATH', the package will use
95 PATH as the prefix for installing programs and libraries.
96 Documentation and other data files will still use the regular prefix.
98 If the package supports it, you can cause programs to be installed
99 with an extra prefix or suffix on their names by giving `configure' the
100 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
105 Some packages pay attention to `--enable-FEATURE' options to
106 `configure', where FEATURE indicates an optional part of the package.
107 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
108 is something like `gnu-as' or `x' (for the X Window System). The
109 `README' should mention any `--enable-' and `--with-' options that the
112 For packages that use the X Window System, `configure' can usually
113 find the X include and library files automatically, but if it doesn't,
114 you can use the `configure' options `--x-includes=DIR' and
115 `--x-libraries=DIR' to specify their locations.
117 Specifying the System Type
118 ==========================
120 There may be some features `configure' can not figure out
121 automatically, but needs to determine by the type of host the package
122 will run on. Usually `configure' can figure that out, but if it prints
123 a message saying it can not guess the host type, give it the
124 `--host=TYPE' option. TYPE can either be a short name for the system
125 type, such as `sun4', or a canonical name with three fields:
128 See the file `config.sub' for the possible values of each field. If
129 `config.sub' isn't included in this package, then this package doesn't
130 need to know the host type.
132 If you are building compiler tools for cross-compiling, you can also
133 use the `--target=TYPE' option to select the type of system they will
134 produce code for and the `--build=TYPE' option to select the type of
135 system on which you are compiling the package.
140 If you want to set default values for `configure' scripts to share,
141 you can create a site shell script called `config.site' that gives
142 default values for variables like `CC', `cache_file', and `prefix'.
143 `configure' looks for `PREFIX/share/config.site' if it exists, then
144 `PREFIX/etc/config.site' if it exists. Or, you can set the
145 `CONFIG_SITE' environment variable to the location of the site script.
146 A warning: not all `configure' scripts look for a site script.
151 `configure' recognizes the following options to control how it
155 Use and save the results of the tests in FILE instead of
156 `./config.cache'. Set FILE to `/dev/null' to disable caching, for
157 debugging `configure'.
160 Print a summary of the options to `configure', and exit.
165 Do not print messages saying which checks are being made.
168 Look for the package's source code in directory DIR. Usually
169 `configure' can determine that directory automatically.
172 Print the version of Autoconf used to generate the `configure'
175 `configure' also accepts some other, not widely useful, options.