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1 Basic Installation
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2 ==================
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3
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4 These are generic installation instructions.
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5
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6 The `configure' shell script attempts to guess correct values for
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7 various system-dependent variables used during compilation. It uses
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8 those values to create a `Makefile' in each directory of the package.
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9 It may also create one or more `.h' files containing system-dependent
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10 definitions. Finally, it creates a shell script `config.status' that
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11 you can run in the future to recreate the current configuration, a file
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12 `config.cache' that saves the results of its tests to speed up
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13 reconfiguring, and a file `config.log' containing compiler output
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14 (useful mainly for debugging `configure').
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15
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16 If you need to do unusual things to compile the package, please try
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17 to figure out how `configure' could check whether to do them, and mail
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18 diffs or instructions to the address given in the `README' so they can
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19 be considered for the next release. If at some point `config.cache'
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20 contains results you don't want to keep, you may remove or edit it.
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21
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22 The file `configure.ac' is used to create `configure' by a program
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23 called `autoconf'. You only need `configure.ac' if you want to change
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24 it or regenerate `configure' using a newer version of `autoconf'.
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25
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26 The simplest way to compile this package is:
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27
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28 1. `cd' to the directory containing the package's source code and type
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29 `./configure' to configure the package for your system. If you're
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30 using `csh' on an old version of System V, you might need to type
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31 `sh ./configure' instead to prevent `csh' from trying to execute
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32 `configure' itself.
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33
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34 Running `configure' takes awhile. While running, it prints some
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35 messages telling which features it is checking for.
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36
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37 2. Type `make' to compile the package.
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38
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39 3. Optionally, type `make check' to run any self-tests that come with
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40 the package.
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41
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42 4. Type `make install' to install the programs and any data files and
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43 documentation.
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44
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45 5. You can remove the program binaries and object files from the
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46 source code directory by typing `make clean'. To also remove the
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47 files that `configure' created (so you can compile the package for
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48 a different kind of computer), type `make distclean'. There is
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49 also a `make maintainer-clean' target, but that is intended mainly
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50 for the package's developers. If you use it, you may have to get
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51 all sorts of other programs in order to regenerate files that came
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52 with the distribution.
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53
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54 Compilers and Options
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55 =====================
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56
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57 Some systems require unusual options for compilation or linking that
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58 the `configure' script does not know about. You can give `configure'
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59 initial values for variables by setting them in the environment. Using
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60 a Bourne-compatible shell, you can do that on the command line like
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61 this:
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62 CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
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63
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64 Or on systems that have the `env' program, you can do it like this:
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65 env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
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66
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67 Compiling For Multiple Architectures
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68 ====================================
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69
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70 You can compile the package for more than one kind of computer at the
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71 same time, by placing the object files for each architecture in their
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72 own directory. To do this, you must use a version of `make' that
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73 supports the `VPATH' variable, such as GNU `make'. `cd' to the
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74 directory where you want the object files and executables to go and run
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75 the `configure' script. `configure' automatically checks for the
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76 source code in the directory that `configure' is in and in `..'.
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77
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78 If you have to use a `make' that does not supports the `VPATH'
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79 variable, you have to compile the package for one architecture at a time
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80 in the source code directory. After you have installed the package for
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81 one architecture, use `make distclean' before reconfiguring for another
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82 architecture.
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83
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84 Installation Names
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85 ==================
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86
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87 By default, `make install' will install the package's files in
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88 `/usr/local/bin', `/usr/local/man', etc. You can specify an
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89 installation prefix other than `/usr/local' by giving `configure' the
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90 option `--prefix=PATH'.
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91
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92 You can specify separate installation prefixes for
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93 architecture-specific files and architecture-independent files. If you
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94 give `configure' the option `--exec-prefix=PATH', the package will use
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95 PATH as the prefix for installing programs and libraries.
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96 Documentation and other data files will still use the regular prefix.
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97
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98 In addition, if you use an unusual directory layout you can give
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99 options like `--bindir=PATH' to specify different values for particular
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100 kinds of files. Run `configure --help' for a list of the directories
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101 you can set and what kinds of files go in them.
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102
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103 If the package supports it, you can cause programs to be installed
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104 with an extra prefix or suffix on their names by giving `configure' the
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105 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
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106
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107 Optional Features
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108 =================
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109
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110 Some packages pay attention to `--enable-FEATURE' options to
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111 `configure', where FEATURE indicates an optional part of the package.
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112 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
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113 is something like `gnu-as' or `x' (for the X Window System). The
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114 `README' should mention any `--enable-' and `--with-' options that the
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115 package recognizes.
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116
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117 For packages that use the X Window System, `configure' can usually
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118 find the X include and library files automatically, but if it doesn't,
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119 you can use the `configure' options `--x-includes=DIR' and
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120 `--x-libraries=DIR' to specify their locations.
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121
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122 Specifying the System Type
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123 ==========================
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124
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125 There may be some features `configure' can not figure out
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126 automatically, but needs to determine by the type of host the package
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127 will run on. Usually `configure' can figure that out, but if it prints
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128 a message saying it can not guess the host type, give it the
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129 `--host=TYPE' option. TYPE can either be a short name for the system
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130 type, such as `sun4', or a canonical name with three fields:
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131 CPU-COMPANY-SYSTEM
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132
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133 See the file `config.sub' for the possible values of each field. If
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134 `config.sub' isn't included in this package, then this package doesn't
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135 need to know the host type.
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136
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137 If you are building compiler tools for cross-compiling, you can also
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138 use the `--target=TYPE' option to select the type of system they will
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139 produce code for and the `--build=TYPE' option to select the type of
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140 system on which you are compiling the package.
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141
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142 Sharing Defaults
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143 ================
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144
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145 If you want to set default values for `configure' scripts to share,
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146 you can create a site shell script called `config.site' that gives
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147 default values for variables like `CC', `cache_file', and `prefix'.
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148 `configure' looks for `PREFIX/share/config.site' if it exists, then
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149 `PREFIX/etc/config.site' if it exists. Or, you can set the
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150 `CONFIG_SITE' environment variable to the location of the site script.
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151 A warning: not all `configure' scripts look for a site script.
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152
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153 Operation Controls
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154 ==================
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155
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156 `configure' recognizes the following options to control how it
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157 operates.
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158
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159 `--cache-file=FILE'
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160 Use and save the results of the tests in FILE instead of
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161 `./config.cache'. Set FILE to `/dev/null' to disable caching, for
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162 debugging `configure'.
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163
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164 `--help'
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165 Print a summary of the options to `configure', and exit.
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166
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167 `--quiet'
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168 `--silent'
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169 `-q'
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170 Do not print messages saying which checks are being made. To
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171 suppress all normal output, redirect it to `/dev/null' (any error
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172 messages will still be shown).
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173
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174 `--srcdir=DIR'
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175 Look for the package's source code in directory DIR. Usually
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176 `configure' can determine that directory automatically.
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177
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178 `--version'
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179 Print the version of Autoconf used to generate the `configure'
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180 script, and exit.
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181
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182 `configure' also accepts some other, not widely useful, options.
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