4.1 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 (see section 22. The Configuration File). 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.