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 10 Old installation documentation
 *********************************
 
    Note most of this information is out of date and superseded by the
 previous chapters of this manual.  It is provided for historical
 reference only, because of a lack of volunteers to merge it into the
 main manual.
 

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* Configurations    Configurations Supported by GCC.
 
    Here is the procedure for installing GCC on a GNU or Unix system.
 
   1. If you have chosen a configuration for GCC which requires other GNU
      tools (such as GAS or the GNU linker) instead of the standard
      system tools, install the required tools in the build directory
      under the names `as', `ld' or whatever is appropriate.
 
      Alternatively, you can do subsequent compilation using a value of
      the `PATH' environment variable such that the necessary GNU tools
      come before the standard system tools.
 
   2. Specify the host, build and target machine configurations.  You do
      this when you run the `configure' script.
 
      The "build" machine is the system which you are using, the "host"
      machine is the system where you want to run the resulting compiler
      (normally the build machine), and the "target" machine is the
      system for which you want the compiler to generate code.
 
      If you are building a compiler to produce code for the machine it
      runs on (a native compiler), you normally do not need to specify
      any operands to `configure'; it will try to guess the type of
      machine you are on and use that as the build, host and target
      machines.  So you don't need to specify a configuration when
      building a native compiler unless `configure' cannot figure out
      what your configuration is or guesses wrong.
 
      In those cases, specify the build machine's "configuration name"
      with the `--host' option; the host and target will default to be
      the same as the host machine.
 
      Here is an example:
 
           ./configure --host=sparc-sun-sunos4.1
 
      A configuration name may be canonical or it may be more or less
      abbreviated.
 
      A canonical configuration name has three parts, separated by
      dashes.  It looks like this: `CPU-COMPANY-SYSTEM'.  (The three
      parts may themselves contain dashes; `configure' can figure out
      which dashes serve which purpose.)  For example,
      `m68k-sun-sunos4.1' specifies a Sun 3.
 
      You can also replace parts of the configuration by nicknames or
      aliases.  For example, `sun3' stands for `m68k-sun', so
      `sun3-sunos4.1' is another way to specify a Sun 3.
 
      You can specify a version number after any of the system types,
      and some of the CPU types.  In most cases, the version is
      irrelevant, and will be ignored.  So you might as well specify the
      version if you know it.
 
      See  Configurations, for a list of supported configuration
      names and notes on many of the configurations.  You should check
      the notes in that section before proceeding any further with the
      installation of GCC.
 
 
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