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  1 Installation Instructions
  2 *************************
  4 Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
  5 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
  7    Copying and distribution of this file, with or without modification,
  8 are permitted in any medium without royalty provided the copyright
  9 notice and this notice are preserved.  This file is offered as-is,
 10 without warranty of any kind.
 12 Basic Installation
 13 ==================
 15    Briefly, the shell commands `./configure; make; make install' should
 16 configure, build, and install this package.  The following
 17 more-detailed instructions are generic; see the `README' file for
 18 instructions specific to this package.  Some packages provide this
 19 `INSTALL' file but do not implement all of the features documented
 20 below.  The lack of an optional feature in a given package is not
 21 necessarily a bug.  More recommendations for GNU packages can be found
 22 in *note Makefile Conventions: (standards)Makefile Conventions.
 24    The `configure' shell script attempts to guess correct values for
 25 various system-dependent variables used during compilation.  It uses
 26 those values to create a `Makefile' in each directory of the package.
 27 It may also create one or more `.h' files containing system-dependent
 28 definitions.  Finally, it creates a shell script `config.status' that
 29 you can run in the future to recreate the current configuration, and a
 30 file `config.log' containing compiler output (useful mainly for
 31 debugging `configure').
 33    It can also use an optional file (typically called `config.cache'
 34 and enabled with `--cache-file=config.cache' or simply `-C') that saves
 35 the results of its tests to speed up reconfiguring.  Caching is
 36 disabled by default to prevent problems with accidental use of stale
 37 cache files.
 39    If you need to do unusual things to compile the package, please try
 40 to figure out how `configure' could check whether to do them, and mail
 41 diffs or instructions to the address given in the `README' so they can
 42 be considered for the next release.  If you are using the cache, and at
 43 some point `config.cache' contains results you don't want to keep, you
 44 may remove or edit it.
 46    The file `configure.ac' (or `configure.in') is used to create
 47 `configure' by a program called `autoconf'.  You need `configure.ac' if
 48 you want to change it or regenerate `configure' using a newer version
 49 of `autoconf'.
 51    The simplest way to compile this package is:
 53   1. `cd' to the directory containing the package's source code and type
 54      `./configure' to configure the package for your system.
 56      Running `configure' might take a while.  While running, it prints
 57      some messages telling which features it is checking for.
 59   2. Type `make' to compile the package.
 61   3. Optionally, type `make check' to run any self-tests that come with
 62      the package, generally using the just-built uninstalled binaries.
 64   4. Type `make install' to install the programs and any data files and
 65      documentation.  When installing into a prefix owned by root, it is
 66      recommended that the package be configured and built as a regular
 67      user, and only the `make install' phase executed with root
 68      privileges.
 70   5. Optionally, type `make installcheck' to repeat any self-tests, but
 71      this time using the binaries in their final installed location.
 72      This target does not install anything.  Running this target as a
 73      regular user, particularly if the prior `make install' required
 74      root privileges, verifies that the installation completed
 75      correctly.
 77   6. You can remove the program binaries and object files from the
 78      source code directory by typing `make clean'.  To also remove the
 79      files that `configure' created (so you can compile the package for
 80      a different kind of computer), type `make distclean'.  There is
 81      also a `make maintainer-clean' target, but that is intended mainly
 82      for the package's developers.  If you use it, you may have to get
 83      all sorts of other programs in order to regenerate files that came
 84      with the distribution.
 86   7. Often, you can also type `make uninstall' to remove the installed
 87      files again.  In practice, not all packages have tested that
 88      uninstallation works correctly, even though it is required by the
 89      GNU Coding Standards.
 91   8. Some packages, particularly those that use Automake, provide `make
 92      distcheck', which can by used by developers to test that all other
 93      targets like `make install' and `make uninstall' work correctly.
 94      This target is generally not run by end users.
 96 Compilers and Options
 97 =====================
 99    Some systems require unusual options for compilation or linking that
100 the `configure' script does not know about.  Run `./configure --help'
101 for details on some of the pertinent environment variables.
103    You can give `configure' initial values for configuration parameters
104 by setting variables in the command line or in the environment.  Here
105 is an example:
107      ./configure CC=c99 CFLAGS=-g LIBS=-lposix
109    *Note Defining Variables::, for more details.
111 Compiling For Multiple Architectures
112 ====================================
114    You can compile the package for more than one kind of computer at the
115 same time, by placing the object files for each architecture in their
116 own directory.  To do this, you can use GNU `make'.  `cd' to the
117 directory where you want the object files and executables to go and run
118 the `configure' script.  `configure' automatically checks for the
119 source code in the directory that `configure' is in and in `..'.  This
120 is known as a "VPATH" build.
122    With a non-GNU `make', it is safer to compile the package for one
123 architecture at a time in the source code directory.  After you have
124 installed the package for one architecture, use `make distclean' before
125 reconfiguring for another architecture.
127    On MacOS X 10.5 and later systems, you can create libraries and
128 executables that work on multiple system types--known as "fat" or
129 "universal" binaries--by specifying multiple `-arch' options to the
130 compiler but only a single `-arch' option to the preprocessor.  Like
131 this:
133      ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
134                  CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
135                  CPP="gcc -E" CXXCPP="g++ -E"
137    This is not guaranteed to produce working output in all cases, you
138 may have to build one architecture at a time and combine the results
139 using the `lipo' tool if you have problems.
141 Installation Names
142 ==================
144    By default, `make install' installs the package's commands under
145 `/usr/local/bin', include files under `/usr/local/include', etc.  You
146 can specify an installation prefix other than `/usr/local' by giving
147 `configure' the option `--prefix=PREFIX', where PREFIX must be an
148 absolute file name.
150    You can specify separate installation prefixes for
151 architecture-specific files and architecture-independent files.  If you
152 pass the option `--exec-prefix=PREFIX' to `configure', the package uses
153 PREFIX as the prefix for installing programs and libraries.
154 Documentation and other data files still use the regular prefix.
156    In addition, if you use an unusual directory layout you can give
157 options like `--bindir=DIR' to specify different values for particular
158 kinds of files.  Run `configure --help' for a list of the directories
159 you can set and what kinds of files go in them.  In general, the
160 default for these options is expressed in terms of `${prefix}', so that
161 specifying just `--prefix' will affect all of the other directory
162 specifications that were not explicitly provided.
164    The most portable way to affect installation locations is to pass the
165 correct locations to `configure'; however, many packages provide one or
166 both of the following shortcuts of passing variable assignments to the
167 `make install' command line to change installation locations without
168 having to reconfigure or recompile.
170    The first method involves providing an override variable for each
171 affected directory.  For example, `make install
172 prefix=/alternate/directory' will choose an alternate location for all
173 directory configuration variables that were expressed in terms of
174 `${prefix}'.  Any directories that were specified during `configure',
175 but not in terms of `${prefix}', must each be overridden at install
176 time for the entire installation to be relocated.  The approach of
177 makefile variable overrides for each directory variable is required by
178 the GNU Coding Standards, and ideally causes no recompilation.
179 However, some platforms have known limitations with the semantics of
180 shared libraries that end up requiring recompilation when using this
181 method, particularly noticeable in packages that use GNU Libtool.
183    The second method involves providing the `DESTDIR' variable.  For
184 example, `make install DESTDIR=/alternate/directory' will prepend
185 `/alternate/directory' before all installation names.  The approach of
186 `DESTDIR' overrides is not required by the GNU Coding Standards, and
187 does not work on platforms that have drive letters.  On the other hand,
188 it does better at avoiding recompilation issues, and works well even
189 when some directory options were not specified in terms of `${prefix}'
190 at `configure' time.
192 Optional Features
193 =================
195    If the package supports it, you can cause programs to be installed
196 with an extra prefix or suffix on their names by giving `configure' the
197 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
199    Some packages pay attention to `--enable-FEATURE' options to
200 `configure', where FEATURE indicates an optional part of the package.
201 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
202 is something like `gnu-as' or `x' (for the X Window System).  The
203 `README' should mention any `--enable-' and `--with-' options that the
204 package recognizes.
206    For packages that use the X Window System, `configure' can usually
207 find the X include and library files automatically, but if it doesn't,
208 you can use the `configure' options `--x-includes=DIR' and
209 `--x-libraries=DIR' to specify their locations.
211    Some packages offer the ability to configure how verbose the
212 execution of `make' will be.  For these packages, running `./configure
213 --enable-silent-rules' sets the default to minimal output, which can be
214 overridden with `make V=1'; while running `./configure
215 --disable-silent-rules' sets the default to verbose, which can be
216 overridden with `make V=0'.
218 Particular systems
219 ==================
221    On HP-UX, the default C compiler is not ANSI C compatible.  If GNU
222 CC is not installed, it is recommended to use the following options in
223 order to use an ANSI C compiler:
225      ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
227 and if that doesn't work, install pre-built binaries of GCC for HP-UX.
229    On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
230 parse its `<wchar.h>' header file.  The option `-nodtk' can be used as
231 a workaround.  If GNU CC is not installed, it is therefore recommended
232 to try
234      ./configure CC="cc"
236 and if that doesn't work, try
238      ./configure CC="cc -nodtk"
240    On Solaris, don't put `/usr/ucb' early in your `PATH'.  This
241 directory contains several dysfunctional programs; working variants of
242 these programs are available in `/usr/bin'.  So, if you need `/usr/ucb'
243 in your `PATH', put it _after_ `/usr/bin'.
245    On Haiku, software installed for all users goes in `/boot/common',
246 not `/usr/local'.  It is recommended to use the following options:
248      ./configure --prefix=/boot/common
250 Specifying the System Type
251 ==========================
253    There may be some features `configure' cannot figure out
254 automatically, but needs to determine by the type of machine the package
255 will run on.  Usually, assuming the package is built to be run on the
256 _same_ architectures, `configure' can figure that out, but if it prints
257 a message saying it cannot guess the machine type, give it the
258 `--build=TYPE' option.  TYPE can either be a short name for the system
259 type, such as `sun4', or a canonical name which has the form:
263 where SYSTEM can have one of these forms:
265      OS
266      KERNEL-OS
268    See the file `config.sub' for the possible values of each field.  If
269 `config.sub' isn't included in this package, then this package doesn't
270 need to know the machine type.
272    If you are _building_ compiler tools for cross-compiling, you should
273 use the option `--target=TYPE' to select the type of system they will
274 produce code for.
276    If you want to _use_ a cross compiler, that generates code for a
277 platform different from the build platform, you should specify the
278 "host" platform (i.e., that on which the generated programs will
279 eventually be run) with `--host=TYPE'.
281 Sharing Defaults
282 ================
284    If you want to set default values for `configure' scripts to share,
285 you can create a site shell script called `config.site' that gives
286 default values for variables like `CC', `cache_file', and `prefix'.
287 `configure' looks for `PREFIX/share/config.site' if it exists, then
288 `PREFIX/etc/config.site' if it exists.  Or, you can set the
289 `CONFIG_SITE' environment variable to the location of the site script.
290 A warning: not all `configure' scripts look for a site script.
292 Defining Variables
293 ==================
295    Variables not defined in a site shell script can be set in the
296 environment passed to `configure'.  However, some packages may run
297 configure again during the build, and the customized values of these
298 variables may be lost.  In order to avoid this problem, you should set
299 them in the `configure' command line, using `VAR=value'.  For example:
301      ./configure CC=/usr/local2/bin/gcc
303 causes the specified `gcc' to be used as the C compiler (unless it is
304 overridden in the site shell script).
306 Unfortunately, this technique does not work for `CONFIG_SHELL' due to
307 an Autoconf bug.  Until the bug is fixed you can use this workaround:
309      CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
311 `configure' Invocation
312 ======================
314    `configure' recognizes the following options to control how it
315 operates.
317 `--help'
318 `-h'
319      Print a summary of all of the options to `configure', and exit.
321 `--help=short'
322 `--help=recursive'
323      Print a summary of the options unique to this package's
324      `configure', and exit.  The `short' variant lists options used
325      only in the top level, while the `recursive' variant lists options
326      also present in any nested packages.
328 `--version'
329 `-V'
330      Print the version of Autoconf used to generate the `configure'
331      script, and exit.
333 `--cache-file=FILE'
334      Enable the cache: use and save the results of the tests in FILE,
335      traditionally `config.cache'.  FILE defaults to `/dev/null' to
336      disable caching.
338 `--config-cache'
339 `-C'
340      Alias for `--cache-file=config.cache'.
342 `--quiet'
343 `--silent'
344 `-q'
345      Do not print messages saying which checks are being made.  To
346      suppress all normal output, redirect it to `/dev/null' (any error
347      messages will still be shown).
349 `--srcdir=DIR'
350      Look for the package's source code in directory DIR.  Usually
351      `configure' can determine that directory automatically.
353 `--prefix=DIR'
354      Use DIR as the installation prefix.  *note Installation Names::
355      for more details, including other options available for fine-tuning
356      the installation locations.
358 `--no-create'
359 `-n'
360      Run the configure checks, but stop before creating any output
361      files.
363 `configure' also accepts some other, not widely useful, options.  Run
364 `configure --help' for more details.

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