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| 1 Installation Instructions | |
| 2 ************************* | |
| 3 | |
| 4 Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005, | |
| 5 2006 Free Software Foundation, Inc. | |
| 6 | |
| 7 This file is free documentation; the Free Software Foundation gives | |
| 8 unlimited permission to copy, distribute and modify it. | |
| 9 | |
| 10 Basic Installation | |
| 11 ================== | |
| 12 | |
| 13 Briefly, the shell commands `./configure; make; make install' should | |
| 14 configure, build, and install this package. The following | |
| 15 more-detailed instructions are generic; see the `README' file for | |
| 16 instructions specific to this package. | |
| 17 | |
| 18 The `configure' shell script attempts to guess correct values for | |
| 19 various system-dependent variables used during compilation. It uses | |
| 20 those values to create a `Makefile' in each directory of the package. | |
| 21 It may also create one or more `.h' files containing system-dependent | |
| 22 definitions. Finally, it creates a shell script `config.status' that | |
| 23 you can run in the future to recreate the current configuration, and a | |
| 24 file `config.log' containing compiler output (useful mainly for | |
| 25 debugging `configure'). | |
| 26 | |
| 27 It can also use an optional file (typically called `config.cache' | |
| 28 and enabled with `--cache-file=config.cache' or simply `-C') that saves | |
| 29 the results of its tests to speed up reconfiguring. Caching is | |
| 30 disabled by default to prevent problems with accidental use of stale | |
| 31 cache files. | |
| 32 | |
| 33 If you need to do unusual things to compile the package, please try | |
| 34 to figure out how `configure' could check whether to do them, and mail | |
| 35 diffs or instructions to the address given in the `README' so they can | |
| 36 be considered for the next release. If you are using the cache, and at | |
| 37 some point `config.cache' contains results you don't want to keep, you | |
| 38 may remove or edit it. | |
| 39 | |
| 40 The file `configure.ac' (or `configure.in') is used to create | |
| 41 `configure' by a program called `autoconf'. You need `configure.ac' if | |
| 42 you want to change it or regenerate `configure' using a newer version | |
| 43 of `autoconf'. | |
| 44 | |
| 45 The simplest way to compile this package is: | |
| 46 | |
| 47 1. `cd' to the directory containing the package's source code and type | |
| 48 `./configure' to configure the package for your system. | |
| 49 | |
| 50 Running `configure' might take a while. While running, it prints | |
| 51 some messages telling which features it is checking for. | |
| 52 | |
| 53 2. Type `make' to compile the package. | |
| 54 | |
| 55 3. Optionally, type `make check' to run any self-tests that come with | |
| 56 the package. | |
| 57 | |
| 58 4. Type `make install' to install the programs and any data files and | |
| 59 documentation. | |
| 60 | |
| 61 5. You can remove the program binaries and object files from the | |
| 62 source code directory by typing `make clean'. To also remove the | |
| 63 files that `configure' created (so you can compile the package for | |
| 64 a different kind of computer), type `make distclean'. There is | |
| 65 also a `make maintainer-clean' target, but that is intended mainly | |
| 66 for the package's developers. If you use it, you may have to get | |
| 67 all sorts of other programs in order to regenerate files that came | |
| 68 with the distribution. | |
| 69 | |
| 70 Compilers and Options | |
| 71 ===================== | |
| 72 | |
| 73 Some systems require unusual options for compilation or linking that the | |
| 74 `configure' script does not know about. Run `./configure --help' for | |
| 75 details on some of the pertinent environment variables. | |
| 76 | |
| 77 You can give `configure' initial values for configuration parameters | |
| 78 by setting variables in the command line or in the environment. Here | |
| 79 is an example: | |
| 80 | |
| 81 ./configure CC=c99 CFLAGS=-g LIBS=-lposix | |
| 82 | |
| 83 *Note Defining Variables::, for more details. | |
| 84 | |
| 85 Compiling For Multiple Architectures | |
| 86 ==================================== | |
| 87 | |
| 88 You can compile the package for more than one kind of computer at the | |
| 89 same time, by placing the object files for each architecture in their | |
| 90 own directory. To do this, you can use GNU `make'. `cd' to the | |
| 91 directory where you want the object files and executables to go and run | |
| 92 the `configure' script. `configure' automatically checks for the | |
| 93 source code in the directory that `configure' is in and in `..'. | |
| 94 | |
| 95 With a non-GNU `make', it is safer to compile the package for one | |
| 96 architecture at a time in the source code directory. After you have | |
| 97 installed the package for one architecture, use `make distclean' before | |
| 98 reconfiguring for another architecture. | |
| 99 | |
| 100 Installation Names | |
| 101 ================== | |
| 102 | |
| 103 By default, `make install' installs the package's commands under | |
| 104 `/usr/local/bin', include files under `/usr/local/include', etc. You | |
| 105 can specify an installation prefix other than `/usr/local' by giving | |
| 106 `configure' the option `--prefix=PREFIX'. | |
| 107 | |
| 108 You can specify separate installation prefixes for | |
| 109 architecture-specific files and architecture-independent files. If you | |
| 110 pass the option `--exec-prefix=PREFIX' to `configure', the package uses | |
| 111 PREFIX as the prefix for installing programs and libraries. | |
| 112 Documentation and other data files still use the regular prefix. | |
| 113 | |
| 114 In addition, if you use an unusual directory layout you can give | |
| 115 options like `--bindir=DIR' to specify different values for particular | |
| 116 kinds of files. Run `configure --help' for a list of the directories | |
| 117 you can set and what kinds of files go in them. | |
| 118 | |
| 119 If the package supports it, you can cause programs to be installed | |
| 120 with an extra prefix or suffix on their names by giving `configure' the | |
| 121 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. | |
| 122 | |
| 123 Optional Features | |
| 124 ================= | |
| 125 | |
| 126 Some packages pay attention to `--enable-FEATURE' options to | |
| 127 `configure', where FEATURE indicates an optional part of the package. | |
| 128 They may also pay attention to `--with-PACKAGE' options, where PACKAGE | |
| 129 is something like `gnu-as' or `x' (for the X Window System). The | |
| 130 `README' should mention any `--enable-' and `--with-' options that the | |
| 131 package recognizes. | |
| 132 | |
| 133 For packages that use the X Window System, `configure' can usually | |
| 134 find the X include and library files automatically, but if it doesn't, | |
| 135 you can use the `configure' options `--x-includes=DIR' and | |
| 136 `--x-libraries=DIR' to specify their locations. | |
| 137 | |
| 138 Specifying the System Type | |
| 139 ========================== | |
| 140 | |
| 141 There may be some features `configure' cannot figure out automatically, | |
| 142 but needs to determine by the type of machine the package will run on. | |
| 143 Usually, assuming the package is built to be run on the _same_ | |
| 144 architectures, `configure' can figure that out, but if it prints a | |
| 145 message saying it cannot guess the machine type, give it the | |
| 146 `--build=TYPE' option. TYPE can either be a short name for the system | |
| 147 type, such as `sun4', or a canonical name which has the form: | |
| 148 | |
| 149 CPU-COMPANY-SYSTEM | |
| 150 | |
| 151 where SYSTEM can have one of these forms: | |
| 152 | |
| 153 OS KERNEL-OS | |
| 154 | |
| 155 See the file `config.sub' for the possible values of each field. If | |
| 156 `config.sub' isn't included in this package, then this package doesn't | |
| 157 need to know the machine type. | |
| 158 | |
| 159 If you are _building_ compiler tools for cross-compiling, you should | |
| 160 use the option `--target=TYPE' to select the type of system they will | |
| 161 produce code for. | |
| 162 | |
| 163 If you want to _use_ a cross compiler, that generates code for a | |
| 164 platform different from the build platform, you should specify the | |
| 165 "host" platform (i.e., that on which the generated programs will | |
| 166 eventually be run) with `--host=TYPE'. | |
| 167 | |
| 168 Sharing Defaults | |
| 169 ================ | |
| 170 | |
| 171 If you want to set default values for `configure' scripts to share, you | |
| 172 can create a site shell script called `config.site' that gives default | |
| 173 values for variables like `CC', `cache_file', and `prefix'. | |
| 174 `configure' looks for `PREFIX/share/config.site' if it exists, then | |
| 175 `PREFIX/etc/config.site' if it exists. Or, you can set the | |
| 176 `CONFIG_SITE' environment variable to the location of the site script. | |
| 177 A warning: not all `configure' scripts look for a site script. | |
| 178 | |
| 179 Defining Variables | |
| 180 ================== | |
| 181 | |
| 182 Variables not defined in a site shell script can be set in the | |
| 183 environment passed to `configure'. However, some packages may run | |
| 184 configure again during the build, and the customized values of these | |
| 185 variables may be lost. In order to avoid this problem, you should set | |
| 186 them in the `configure' command line, using `VAR=value'. For example: | |
| 187 | |
| 188 ./configure CC=/usr/local2/bin/gcc | |
| 189 | |
| 190 causes the specified `gcc' to be used as the C compiler (unless it is | |
| 191 overridden in the site shell script). | |
| 192 | |
| 193 Unfortunately, this technique does not work for `CONFIG_SHELL' due to | |
| 194 an Autoconf bug. Until the bug is fixed you can use this workaround: | |
| 195 | |
| 196 CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash | |
| 197 | |
| 198 `configure' Invocation | |
| 199 ====================== | |
| 200 | |
| 201 `configure' recognizes the following options to control how it operates. | |
| 202 | |
| 203 `--help' | |
| 204 `-h' | |
| 205 Print a summary of the options to `configure', and exit. | |
| 206 | |
| 207 `--version' | |
| 208 `-V' | |
| 209 Print the version of Autoconf used to generate the `configure' | |
| 210 script, and exit. | |
| 211 | |
| 212 `--cache-file=FILE' | |
| 213 Enable the cache: use and save the results of the tests in FILE, | |
| 214 traditionally `config.cache'. FILE defaults to `/dev/null' to | |
| 215 disable caching. | |
| 216 | |
| 217 `--config-cache' | |
| 218 `-C' | |
| 219 Alias for `--cache-file=config.cache'. | |
| 220 | |
| 221 `--quiet' | |
| 222 `--silent' | |
| 223 `-q' | |
| 224 Do not print messages saying which checks are being made. To | |
| 225 suppress all normal output, redirect it to `/dev/null' (any error | |
| 226 messages will still be shown). | |
| 227 | |
| 228 `--srcdir=DIR' | |
| 229 Look for the package's source code in directory DIR. Usually | |
| 230 `configure' can determine that directory automatically. | |
| 231 | |
| 232 `configure' also accepts some other, not widely useful, options. Run | |
| 233 `configure --help' for more details. | |
| 234 |
