annotate INSTALL @ 227:3fee608becbc stable-6-0-21

Fixes to compile on old systems without memrchr or string::clear(). Fix bug in spamassassin interface trying to clear a string with string::empty().
author Carl Byington <carl@five-ten-sg.com>
date Sat, 03 Jan 2009 15:16:47 -0800
parents 9978e29c4d71
children
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1 Installation Instructions
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2 *************************
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3
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4 Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004 Free
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5 Software Foundation, Inc.
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6
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7 This file is free documentation; the Free Software Foundation gives
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8 unlimited permission to copy, distribute and modify it.
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9
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10 Basic Installation
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11 ==================
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12
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13 These are generic installation instructions.
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14
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15 The `configure' shell script attempts to guess correct values for
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16 various system-dependent variables used during compilation. It uses
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17 those values to create a `Makefile' in each directory of the package.
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18 It may also create one or more `.h' files containing system-dependent
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19 definitions. Finally, it creates a shell script `config.status' that
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20 you can run in the future to recreate the current configuration, and a
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21 file `config.log' containing compiler output (useful mainly for
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22 debugging `configure').
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23
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24 It can also use an optional file (typically called `config.cache'
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25 and enabled with `--cache-file=config.cache' or simply `-C') that saves
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26 the results of its tests to speed up reconfiguring. (Caching is
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27 disabled by default to prevent problems with accidental use of stale
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28 cache files.)
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29
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30 If you need to do unusual things to compile the package, please try
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31 to figure out how `configure' could check whether to do them, and mail
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32 diffs or instructions to the address given in the `README' so they can
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33 be considered for the next release. If you are using the cache, and at
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34 some point `config.cache' contains results you don't want to keep, you
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35 may remove or edit it.
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36
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37 The file `configure.ac' (or `configure.in') is used to create
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38 `configure' by a program called `autoconf'. You only need
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39 `configure.ac' if you want to change it or regenerate `configure' using
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40 a newer version of `autoconf'.
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41
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42 The simplest way to compile this package is:
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43
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44 1. `cd' to the directory containing the package's source code and type
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45 `./configure' to configure the package for your system. If you're
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46 using `csh' on an old version of System V, you might need to type
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47 `sh ./configure' instead to prevent `csh' from trying to execute
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48 `configure' itself.
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49
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50 Running `configure' takes awhile. While running, it prints some
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51 messages telling which features it is checking for.
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52
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53 2. Type `make' to compile the package.
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54
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55 3. Optionally, type `make check' to run any self-tests that come with
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56 the package.
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57
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58 4. Type `make install' to install the programs and any data files and
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59 documentation.
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60
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61 5. You can remove the program binaries and object files from the
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62 source code directory by typing `make clean'. To also remove the
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63 files that `configure' created (so you can compile the package for
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64 a different kind of computer), type `make distclean'. There is
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65 also a `make maintainer-clean' target, but that is intended mainly
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66 for the package's developers. If you use it, you may have to get
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67 all sorts of other programs in order to regenerate files that came
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68 with the distribution.
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69
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70 Compilers and Options
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71 =====================
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72
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73 Some systems require unusual options for compilation or linking that the
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74 `configure' script does not know about. Run `./configure --help' for
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75 details on some of the pertinent environment variables.
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76
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77 You can give `configure' initial values for configuration parameters
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78 by setting variables in the command line or in the environment. Here
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79 is an example:
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80
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81 ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
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82
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83 *Note Defining Variables::, for more details.
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84
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85 Compiling For Multiple Architectures
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86 ====================================
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87
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88 You can compile the package for more than one kind of computer at the
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89 same time, by placing the object files for each architecture in their
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90 own directory. To do this, you must use a version of `make' that
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91 supports the `VPATH' variable, such as GNU `make'. `cd' to the
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92 directory where you want the object files and executables to go and run
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93 the `configure' script. `configure' automatically checks for the
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94 source code in the directory that `configure' is in and in `..'.
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96 If you have to use a `make' that does not support the `VPATH'
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97 variable, you have to compile the package for one architecture at a
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98 time in the source code directory. After you have installed the
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99 package for one architecture, use `make distclean' before reconfiguring
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100 for another architecture.
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101
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102 Installation Names
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103 ==================
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104
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105 By default, `make install' will install the package's files in
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106 `/usr/local/bin', `/usr/local/man', etc. You can specify an
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107 installation prefix other than `/usr/local' by giving `configure' the
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108 option `--prefix=PREFIX'.
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109
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110 You can specify separate installation prefixes for
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111 architecture-specific files and architecture-independent files. If you
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112 give `configure' the option `--exec-prefix=PREFIX', the package will
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113 use PREFIX as the prefix for installing programs and libraries.
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114 Documentation and other data files will still use the regular prefix.
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115
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116 In addition, if you use an unusual directory layout you can give
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117 options like `--bindir=DIR' to specify different values for particular
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118 kinds of files. Run `configure --help' for a list of the directories
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119 you can set and what kinds of files go in them.
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120
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121 If the package supports it, you can cause programs to be installed
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122 with an extra prefix or suffix on their names by giving `configure' the
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123 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
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124
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125 Optional Features
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126 =================
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127
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128 Some packages pay attention to `--enable-FEATURE' options to
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129 `configure', where FEATURE indicates an optional part of the package.
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130 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
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131 is something like `gnu-as' or `x' (for the X Window System). The
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132 `README' should mention any `--enable-' and `--with-' options that the
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133 package recognizes.
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134
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135 For packages that use the X Window System, `configure' can usually
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136 find the X include and library files automatically, but if it doesn't,
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137 you can use the `configure' options `--x-includes=DIR' and
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138 `--x-libraries=DIR' to specify their locations.
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139
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140 Specifying the System Type
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141 ==========================
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142
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143 There may be some features `configure' cannot figure out automatically,
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144 but needs to determine by the type of machine the package will run on.
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145 Usually, assuming the package is built to be run on the _same_
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146 architectures, `configure' can figure that out, but if it prints a
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147 message saying it cannot guess the machine type, give it the
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148 `--build=TYPE' option. TYPE can either be a short name for the system
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149 type, such as `sun4', or a canonical name which has the form:
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150
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151 CPU-COMPANY-SYSTEM
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152
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153 where SYSTEM can have one of these forms:
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154
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155 OS KERNEL-OS
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156
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157 See the file `config.sub' for the possible values of each field. If
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158 `config.sub' isn't included in this package, then this package doesn't
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159 need to know the machine type.
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160
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161 If you are _building_ compiler tools for cross-compiling, you should
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162 use the `--target=TYPE' option to select the type of system they will
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163 produce code for.
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164
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165 If you want to _use_ a cross compiler, that generates code for a
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166 platform different from the build platform, you should specify the
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167 "host" platform (i.e., that on which the generated programs will
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168 eventually be run) with `--host=TYPE'.
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169
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170 Sharing Defaults
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171 ================
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172
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173 If you want to set default values for `configure' scripts to share, you
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174 can create a site shell script called `config.site' that gives default
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175 values for variables like `CC', `cache_file', and `prefix'.
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176 `configure' looks for `PREFIX/share/config.site' if it exists, then
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177 `PREFIX/etc/config.site' if it exists. Or, you can set the
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178 `CONFIG_SITE' environment variable to the location of the site script.
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179 A warning: not all `configure' scripts look for a site script.
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180
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181 Defining Variables
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182 ==================
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183
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184 Variables not defined in a site shell script can be set in the
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185 environment passed to `configure'. However, some packages may run
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186 configure again during the build, and the customized values of these
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187 variables may be lost. In order to avoid this problem, you should set
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188 them in the `configure' command line, using `VAR=value'. For example:
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189
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190 ./configure CC=/usr/local2/bin/gcc
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191
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192 will cause the specified gcc to be used as the C compiler (unless it is
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193 overridden in the site shell script).
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194
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195 `configure' Invocation
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196 ======================
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197
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198 `configure' recognizes the following options to control how it operates.
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199
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200 `--help'
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201 `-h'
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202 Print a summary of the options to `configure', and exit.
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203
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204 `--version'
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205 `-V'
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206 Print the version of Autoconf used to generate the `configure'
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207 script, and exit.
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208
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209 `--cache-file=FILE'
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210 Enable the cache: use and save the results of the tests in FILE,
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211 traditionally `config.cache'. FILE defaults to `/dev/null' to
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212 disable caching.
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213
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214 `--config-cache'
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215 `-C'
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216 Alias for `--cache-file=config.cache'.
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217
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218 `--quiet'
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219 `--silent'
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220 `-q'
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221 Do not print messages saying which checks are being made. To
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222 suppress all normal output, redirect it to `/dev/null' (any error
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223 messages will still be shown).
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224
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225 `--srcdir=DIR'
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226 Look for the package's source code in directory DIR. Usually
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227 `configure' can determine that directory automatically.
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228
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229 `configure' also accepts some other, not widely useful, options. Run
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230 `configure --help' for more details.
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231