vw安装

Installation Instructions

Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,

2006 Free Software Foundation, Inc.

This file is free documentation; the Free Software Foundation gives

unlimited permission to copy, distribute and modify it.

Basic Installation

Briefly, the shell commands

./configure; make; make install' should 

configure, build, and install this package.  The following 

more-detailed instructions are generic; see the

README.md’ file for

instructions specific to this package.

The

configure' shell script attempts to guess correct values for 

various system-dependent variables used during compilation.  It uses 

those values to create a

Makefile’ in each directory of the package.

It may also create one or more

.h' files containing system-dependent 

definitions.  Finally, it creates a shell script

config.status’ that

you can run in the future to recreate the current configuration, and a

file

config.log' containing compiler output (useful mainly for 

debugging

configure’).

It can also use an optional file (typically called

config.cache' 

and enabled with

–cache-file=config.cache’ or simply `-C’) that saves

the results of its tests to speed up reconfiguring. Caching is

disabled by default to prevent problems with accidental use of stale

cache files.

If you need to do unusual things to compile the package, please try

to figure out how

configure' could check whether to do them, and mail 

diffs or instructions to the address given in the

README.md’ so they can

be considered for the next release. If you are using the cache, and at

some point `config.cache’ contains results you don’t want to keep, you

may remove or edit it.

The file

configure.ac' (or

configure.in’) is used to create

configure' by a program called

autoconf’. You need

configure.ac' if 

you want to change it or regenerate

configure’ using a newer version

of `autoconf’.

The simplest way to compile this package is:

cd' to the directory containing the package's source code and type

./configure’ to configure the package for your system.

Running `configure’ might take a while. While running, it prints

some messages telling which features it is checking for.

Type `make’ to compile the package.

Optionally, type `make check’ to run any self-tests that come with

the package.

Type `make install’ to install the programs and any data files and

documentation.

You can remove the program binaries and object files from the

source code directory by typing

make clean'.  To also remove the 

 files that

configure’ created (so you can compile the package for

a different kind of computer), type

make distclean'.  There is 

 also a

make maintainer-clean’ target, but that is intended mainly

for the package’s developers. If you use it, you may have to get

all sorts of other programs in order to regenerate files that came

with the distribution.

Compilers and Options

Some systems require unusual options for compilation or linking that the

configure' script does not know about.  Run

./configure –help’ for

details on some of the pertinent environment variables.

You can give `configure’ initial values for configuration parameters

by setting variables in the command line or in the environment. Here

is an example:

./configure CC=c99 CFLAGS=-g LIBS=-lposix

*Note Defining Variables::, for more details.

Compiling For Multiple Architectures

You can compile the package for more than one kind of computer at the

same time, by placing the object files for each architecture in their

own directory. To do this, you can use GNU

make'.

cd’ to the

directory where you want the object files and executables to go and run

the

configure' script.

configure’ automatically checks for the

source code in the directory that

configure' is in and in

..’.

With a non-GNU

make', it is safer to compile the package for one 

architecture at a time in the source code directory.  After you have 

installed the package for one architecture, use

make distclean’ before

reconfiguring for another architecture.

Installation Names

By default,

make install' installs the package's commands under

/usr/local/bin’, include files under

/usr/local/include', etc.  You 

can specify an installation prefix other than

/usr/local’ by giving

configure' the option

–prefix=PREFIX’.

You can specify separate installation prefixes for

architecture-specific files and architecture-independent files. If you

pass the option

--exec-prefix=PREFIX' to

configure’, the package uses

PREFIX as the prefix for installing programs and libraries.

Documentation and other data files still use the regular prefix.

In addition, if you use an unusual directory layout you can give

options like

--bindir=DIR' to specify different values for particular 

kinds of files.  Run

configure –help’ for a list of the directories

you can set and what kinds of files go in them.

If the package supports it, you can cause programs to be installed

with an extra prefix or suffix on their names by giving

configure' the 

option

–program-prefix=PREFIX’ or `–program-suffix=SUFFIX’.

Optional Features

Some packages pay attention to

--enable-FEATURE' options to

configure’, where FEATURE indicates an optional part of the package.

They may also pay attention to

--with-PACKAGE' options, where PACKAGE 

is something like

gnu-as’ or

x' (for the X Window System).  The

README.md’ should mention any

--enable-' and

–with-’ options that the

package recognizes.

For packages that use the X Window System,

configure' can usually 

find the X include and library files automatically, but if it doesn't, 

you can use the

configure’ options

--x-includes=DIR' and

–x-libraries=DIR’ to specify their locations.

Specifying the System Type

There may be some features

configure' cannot figure out automatically, 

but needs to determine by the type of machine the package will run on. 

Usually, assuming the package is built to be run on the _same_ 

architectures,

configure’ can figure that out, but if it prints a

message saying it cannot guess the machine type, give it the

--build=TYPE' option.  TYPE can either be a short name for the system 

type, such as

sun4’, or a canonical name which has the form:

CPU-COMPANY-SYSTEM

where SYSTEM can have one of these forms:

OS KERNEL-OS

See the file

config.sub' for the possible values of each field.  If

config.sub’ isn’t included in this package, then this package doesn’t

need to know the machine type.

If you are building compiler tools for cross-compiling, you should

use the option `–target=TYPE’ to select the type of system they will

produce code for.

If you want to use a cross compiler, that generates code for a

platform different from the build platform, you should specify the

“host” platform (i.e., that on which the generated programs will

eventually be run) with `–host=TYPE’.

Sharing Defaults

If you want to set default values for

configure' scripts to share, you 

can create a site shell script called

config.site’ that gives default

values for variables like

CC',

cache_file’, and

prefix'.

configure’ looks for

PREFIX/share/config.site' if it exists, then

PREFIX/etc/config.site’ if it exists. Or, you can set the

CONFIG_SITE' environment variable to the location of the site script. 

A warning: not all

configure’ scripts look for a site script.

Defining Variables

Variables not defined in a site shell script can be set in the

environment passed to

configure'.  However, some packages may run 

configure again during the build, and the customized values of these 

variables may be lost.  In order to avoid this problem, you should set 

them in the

configure’ command line, using `VAR=value’. For example:

./configure CC=/usr/local2/bin/gcc

causes the specified `gcc’ to be used as the C compiler (unless it is

overridden in the site shell script).

Unfortunately, this technique does not work for `CONFIG_SHELL’ due to

an Autoconf bug. Until the bug is fixed you can use this workaround:

CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash

`configure’ Invocation

`configure’ recognizes the following options to control how it operates.

--help'

-h’

Print a summary of the options to `configure’, and exit.

--version'

-V’

Print the version of Autoconf used to generate the `configure’

script, and exit.

--cache-file=FILE' 

     Enable the cache: use and save the results of the tests in FILE, 

     traditionally

config.cache’. FILE defaults to `/dev/null’ to

disable caching.

--config-cache'

-C’

Alias for `–cache-file=config.cache’.

--quiet'

–silent’

-q' 

     Do not print messages saying which checks are being made.  To 

     suppress all normal output, redirect it to

/dev/null’ (any error

messages will still be shown).

--srcdir=DIR' 

     Look for the package's source code in directory DIR.  Usually

configure’ can determine that directory automatically.

configure' also accepts some other, not widely useful, options.  Run

configure –help’ for more details.