(gcc-295.info)Configuration Files


Files Created by `configure'
============================

   Here we spell out what files will be set up by `configure'.  Normally
you need not be concerned with these files.

   * A file named `config.h' is created that contains a `#include' of
     the top-level config file for the machine you will run the compiler
     on (Note: Config.).  This file is responsible for defining
     information about the host machine.  It includes `tm.h'.

     The top-level config file is located in the subdirectory `config'.
     Its name is always `xm-SOMETHING.h'; usually `xm-MACHINE.h', but
     there are some exceptions.

     If your system does not support symbolic links, you might want to
     set up `config.h' to contain a `#include' command which refers to
     the appropriate file.

   * A file named `tconfig.h' is created which includes the top-level
     config file for your target machine.  This is used for compiling
     certain programs to run on that machine.

   * A file named `tm.h' is created which includes the
     machine-description macro file for your target machine.  It should
     be in the subdirectory `config' and its name is often `MACHINE.h'.

   * The command file `configure' also constructs the file `Makefile'
     by adding some text to the template file `Makefile.in'.  The
     additional text comes from files in the `config' directory, named
     `t-TARGET' and `x-HOST'.  If these files do not exist, it means
     nothing needs to be added for a given target or host.


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