config/INSTALL
author Mario de Sousa <msousa@fe.up.pt>
Tue, 25 Dec 2018 12:15:29 +0000
changeset 1077 b37de6a9ad7f
parent 353 17bffb57a8c5
permissions -rw-r--r--
partial fix to issue #76 - calculate task periods with 1ms (instead of 1ns) resolution. Allows for tasks with periods larger than 4.295s, but smaller than 50 days.
353
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Installation Instructions
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*************************
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Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
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2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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   Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.  This file is offered as-is,
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without warranty of any kind.
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Basic Installation
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==================
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   Briefly, the shell commands `./configure; make; make install' should
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configure, build, and install this package.  The following
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more-detailed instructions are generic; see the `README' file for
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instructions specific to this package.  Some packages provide this
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`INSTALL' file but do not implement all of the features documented
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below.  The lack of an optional feature in a given package is not
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necessarily a bug.  More recommendations for GNU packages can be found
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in *note Makefile Conventions: (standards)Makefile Conventions.
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   The `configure' shell script attempts to guess correct values for
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various system-dependent variables used during compilation.  It uses
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those values to create a `Makefile' in each directory of the package.
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It may also create one or more `.h' files containing system-dependent
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definitions.  Finally, it creates a shell script `config.status' that
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you can run in the future to recreate the current configuration, and a
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file `config.log' containing compiler output (useful mainly for
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debugging `configure').
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   It can also use an optional file (typically called `config.cache'
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and enabled with `--cache-file=config.cache' or simply `-C') that saves
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the results of its tests to speed up reconfiguring.  Caching is
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disabled by default to prevent problems with accidental use of stale
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cache files.
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   If you need to do unusual things to compile the package, please try
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to figure out how `configure' could check whether to do them, and mail
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diffs or instructions to the address given in the `README' so they can
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be considered for the next release.  If you are using the cache, and at
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some point `config.cache' contains results you don't want to keep, you
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may remove or edit it.
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   The file `configure.ac' (or `configure.in') is used to create
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`configure' by a program called `autoconf'.  You need `configure.ac' if
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you want to change it or regenerate `configure' using a newer version
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of `autoconf'.
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   The simplest way to compile this package is:
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  1. `cd' to the directory containing the package's source code and type
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     `./configure' to configure the package for your system.
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     Running `configure' might take a while.  While running, it prints
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     some messages telling which features it is checking for.
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  2. Type `make' to compile the package.
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  3. Optionally, type `make check' to run any self-tests that come with
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     the package, generally using the just-built uninstalled binaries.
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  4. Type `make install' to install the programs and any data files and
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     documentation.  When installing into a prefix owned by root, it is
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     recommended that the package be configured and built as a regular
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     user, and only the `make install' phase executed with root
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     privileges.
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  5. Optionally, type `make installcheck' to repeat any self-tests, but
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     this time using the binaries in their final installed location.
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     This target does not install anything.  Running this target as a
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     regular user, particularly if the prior `make install' required
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     root privileges, verifies that the installation completed
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     correctly.
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  6. You can remove the program binaries and object files from the
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     source code directory by typing `make clean'.  To also remove the
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     files that `configure' created (so you can compile the package for
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     a different kind of computer), type `make distclean'.  There is
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     also a `make maintainer-clean' target, but that is intended mainly
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     for the package's developers.  If you use it, you may have to get
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     all sorts of other programs in order to regenerate files that came
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     with the distribution.
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  7. Often, you can also type `make uninstall' to remove the installed
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     files again.  In practice, not all packages have tested that
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     uninstallation works correctly, even though it is required by the
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     GNU Coding Standards.
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  8. Some packages, particularly those that use Automake, provide `make
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     distcheck', which can by used by developers to test that all other
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     targets like `make install' and `make uninstall' work correctly.
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     This target is generally not run by end users.
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Compilers and Options
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=====================
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   Some systems require unusual options for compilation or linking that
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the `configure' script does not know about.  Run `./configure --help'
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for details on some of the pertinent environment variables.
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   You can give `configure' initial values for configuration parameters
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by setting variables in the command line or in the environment.  Here
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is an example:
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     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
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   *Note Defining Variables::, for more details.
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Compiling For Multiple Architectures
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====================================
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   You can compile the package for more than one kind of computer at the
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same time, by placing the object files for each architecture in their
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own directory.  To do this, you can use GNU `make'.  `cd' to the
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directory where you want the object files and executables to go and run
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the `configure' script.  `configure' automatically checks for the
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source code in the directory that `configure' is in and in `..'.  This
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is known as a "VPATH" build.
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   With a non-GNU `make', it is safer to compile the package for one
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architecture at a time in the source code directory.  After you have
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installed the package for one architecture, use `make distclean' before
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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reconfiguring for another architecture.
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   On MacOS X 10.5 and later systems, you can create libraries and
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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executables that work on multiple system types--known as "fat" or
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"universal" binaries--by specifying multiple `-arch' options to the
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compiler but only a single `-arch' option to the preprocessor.  Like
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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this:
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     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
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                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
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                 CPP="gcc -E" CXXCPP="g++ -E"
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   This is not guaranteed to produce working output in all cases, you
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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may have to build one architecture at a time and combine the results
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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using the `lipo' tool if you have problems.
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Installation Names
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==================
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   By default, `make install' installs the package's commands under
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`/usr/local/bin', include files under `/usr/local/include', etc.  You
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can specify an installation prefix other than `/usr/local' by giving
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`configure' the option `--prefix=PREFIX', where PREFIX must be an
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absolute file name.
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   You can specify separate installation prefixes for
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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architecture-specific files and architecture-independent files.  If you
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pass the option `--exec-prefix=PREFIX' to `configure', the package uses
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PREFIX as the prefix for installing programs and libraries.
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Documentation and other data files still use the regular prefix.
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   In addition, if you use an unusual directory layout you can give
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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options like `--bindir=DIR' to specify different values for particular
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kinds of files.  Run `configure --help' for a list of the directories
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you can set and what kinds of files go in them.  In general, the
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default for these options is expressed in terms of `${prefix}', so that
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specifying just `--prefix' will affect all of the other directory
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specifications that were not explicitly provided.
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   163
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   The most portable way to affect installation locations is to pass the
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correct locations to `configure'; however, many packages provide one or
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both of the following shortcuts of passing variable assignments to the
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`make install' command line to change installation locations without
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having to reconfigure or recompile.
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   The first method involves providing an override variable for each
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affected directory.  For example, `make install
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prefix=/alternate/directory' will choose an alternate location for all
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directory configuration variables that were expressed in terms of
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`${prefix}'.  Any directories that were specified during `configure',
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but not in terms of `${prefix}', must each be overridden at install
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time for the entire installation to be relocated.  The approach of
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makefile variable overrides for each directory variable is required by
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the GNU Coding Standards, and ideally causes no recompilation.
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However, some platforms have known limitations with the semantics of
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shared libraries that end up requiring recompilation when using this
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method, particularly noticeable in packages that use GNU Libtool.
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   The second method involves providing the `DESTDIR' variable.  For
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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example, `make install DESTDIR=/alternate/directory' will prepend
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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`/alternate/directory' before all installation names.  The approach of
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`DESTDIR' overrides is not required by the GNU Coding Standards, and
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does not work on platforms that have drive letters.  On the other hand,
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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it does better at avoiding recompilation issues, and works well even
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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when some directory options were not specified in terms of `${prefix}'
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at `configure' time.
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Optional Features
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=================
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   If the package supports it, you can cause programs to be installed
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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with an extra prefix or suffix on their names by giving `configure' the
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option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
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   Some packages pay attention to `--enable-FEATURE' options to
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`configure', where FEATURE indicates an optional part of the package.
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They may also pay attention to `--with-PACKAGE' options, where PACKAGE
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is something like `gnu-as' or `x' (for the X Window System).  The
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`README' should mention any `--enable-' and `--with-' options that the
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package recognizes.
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   For packages that use the X Window System, `configure' can usually
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find the X include and library files automatically, but if it doesn't,
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you can use the `configure' options `--x-includes=DIR' and
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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`--x-libraries=DIR' to specify their locations.
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   Some packages offer the ability to configure how verbose the
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execution of `make' will be.  For these packages, running `./configure
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--enable-silent-rules' sets the default to minimal output, which can be
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overridden with `make V=1'; while running `./configure
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--disable-silent-rules' sets the default to verbose, which can be
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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overridden with `make V=0'.
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Particular systems
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==================
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   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU
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CC is not installed, it is recommended to use the following options in
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order to use an ANSI C compiler:
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     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
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and if that doesn't work, install pre-built binaries of GCC for HP-UX.
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   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
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parse its `<wchar.h>' header file.  The option `-nodtk' can be used as
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a workaround.  If GNU CC is not installed, it is therefore recommended
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to try
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     ./configure CC="cc"
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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and if that doesn't work, try
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     ./configure CC="cc -nodtk"
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   On Solaris, don't put `/usr/ucb' early in your `PATH'.  This
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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directory contains several dysfunctional programs; working variants of
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these programs are available in `/usr/bin'.  So, if you need `/usr/ucb'
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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in your `PATH', put it _after_ `/usr/bin'.
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   On Haiku, software installed for all users goes in `/boot/common',
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not `/usr/local'.  It is recommended to use the following options:
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     ./configure --prefix=/boot/common
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Specifying the System Type
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==========================
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   There may be some features `configure' cannot figure out
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automatically, but needs to determine by the type of machine the package
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will run on.  Usually, assuming the package is built to be run on the
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_same_ architectures, `configure' can figure that out, but if it prints
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a message saying it cannot guess the machine type, give it the
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`--build=TYPE' option.  TYPE can either be a short name for the system
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type, such as `sun4', or a canonical name which has the form:
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     CPU-COMPANY-SYSTEM
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where SYSTEM can have one of these forms:
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     OS
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     KERNEL-OS
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   See the file `config.sub' for the possible values of each field.  If
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`config.sub' isn't included in this package, then this package doesn't
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need to know the machine type.
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   If you are _building_ compiler tools for cross-compiling, you should
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use the option `--target=TYPE' to select the type of system they will
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produce code for.
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   If you want to _use_ a cross compiler, that generates code for a
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platform different from the build platform, you should specify the
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"host" platform (i.e., that on which the generated programs will
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eventually be run) with `--host=TYPE'.
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Sharing Defaults
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================
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17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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   If you want to set default values for `configure' scripts to share,
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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you can create a site shell script called `config.site' that gives
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default values for variables like `CC', `cache_file', and `prefix'.
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`configure' looks for `PREFIX/share/config.site' if it exists, then
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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`PREFIX/etc/config.site' if it exists.  Or, you can set the
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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`CONFIG_SITE' environment variable to the location of the site script.
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A warning: not all `configure' scripts look for a site script.
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Defining Variables
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==================
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   Variables not defined in a site shell script can be set in the
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environment passed to `configure'.  However, some packages may run
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configure again during the build, and the customized values of these
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variables may be lost.  In order to avoid this problem, you should set
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them in the `configure' command line, using `VAR=value'.  For example:
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     ./configure CC=/usr/local2/bin/gcc
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causes the specified `gcc' to be used as the C compiler (unless it is
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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overridden in the site shell script).
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Unfortunately, this technique does not work for `CONFIG_SHELL' due to
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an Autoconf bug.  Until the bug is fixed you can use this workaround:
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     CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
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`configure' Invocation
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======================
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   `configure' recognizes the following options to control how it
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operates.
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`--help'
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`-h'
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     Print a summary of all of the options to `configure', and exit.
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`--help=short'
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`--help=recursive'
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     Print a summary of the options unique to this package's
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     `configure', and exit.  The `short' variant lists options used
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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     only in the top level, while the `recursive' variant lists options
17bffb57a8c5 Building compiler with autoconf. Thanks go to Matteo of sirius-es.it
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     also present in any nested packages.
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`--version'
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`-V'
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     Print the version of Autoconf used to generate the `configure'
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     script, and exit.
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`--cache-file=FILE'
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     Enable the cache: use and save the results of the tests in FILE,
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     traditionally `config.cache'.  FILE defaults to `/dev/null' to
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     disable caching.
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`--config-cache'
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`-C'
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     Alias for `--cache-file=config.cache'.
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`--quiet'
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`--silent'
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`-q'
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     Do not print messages saying which checks are being made.  To
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     suppress all normal output, redirect it to `/dev/null' (any error
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     messages will still be shown).
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`--srcdir=DIR'
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     Look for the package's source code in directory DIR.  Usually
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     `configure' can determine that directory automatically.
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`--prefix=DIR'
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     Use DIR as the installation prefix.  *note Installation Names::
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     for more details, including other options available for fine-tuning
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     the installation locations.
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`--no-create'
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`-n'
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     Run the configure checks, but stop before creating any output
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     files.
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`configure' also accepts some other, not widely useful, options.  Run
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`configure --help' for more details.
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