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@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,

@c 1999, 2000, 2001, 2002, 2010 Free Software Foundation, Inc.

@c This is part of the GCC manual.

@c For copying conditions, see the file gcc.texi.

@node Configuration Files

@subsubsection Files Created by @code{configure}

Here we spell out what files will be set up by @file{configure} in the

@file{gcc} directory.  Some other files are created as temporary files

in the configuration process, and are not used in the subsequent

build; these are not documented.

@itemize @bullet

@item

@file{Makefile} is constructed from @file{Makefile.in}, together with

the host and target fragments (@pxref{Fragments, , Makefile

Fragments}) @file{t-@var{target}} and @file{x-@var{host}} from

@file{config}, if any, and language Makefile fragments

@file{@var{language}/Make-lang.in}.

@item

@file{auto-host.h} contains information about the host machine

determined by @file{configure}.  If the host machine is different from

the build machine, then @file{auto-build.h} is also created,

containing such information about the build machine.

@item

@file{config.status} is a script that may be run to recreate the

current configuration.

@item

@file{configargs.h} is a header containing details of the arguments

passed to @file{configure} to configure GCC, and of the thread model

used.

@item

@file{cstamp-h} is used as a timestamp.

@item

@file{gccbug}, a script for reporting bugs in GCC, is constructed from

@file{gccbug.in}.

@item

If a language @file{config-lang.in} file (@pxref{Front End Config, ,

The Front End @file{config-lang.in} File}) sets @code{outputs}, then

the files listed in @code{outputs} there are also generated.

@end itemize

The following configuration headers are created from the Makefile,

using @file{mkconfig.sh}, rather than directly by @file{configure}.

@file{config.h}, @file{bconfig.h} and @file{tconfig.h} all contain the

@file{xm-@var{machine}.h} header, if any, appropriate to the host,

build and target machines respectively, the configuration headers for

the target, and some definitions; for the host and build machines,

these include the autoconfigured headers generated by

@file{configure}.  The other configuration headers are determined by

@file{config.gcc}.  They also contain the typedefs for @code{rtx},

@code{rtvec} and @code{tree}.

@itemize @bullet

@item

@file{config.h}, for use in programs that run on the host machine.

@item

@file{bconfig.h}, for use in programs that run on the build machine.

@item

@file{tconfig.h}, for use in programs and libraries for the target

machine.

@item

@file{tm_p.h}, which includes the header @file{@var{machine}-protos.h}

that contains prototypes for functions in the target @file{.c} file.

FIXME: why is such a separate header necessary?

@end itemize