1*8feb0f0bSmrg@c Copyright (C) 1988-2020 Free Software Foundation, Inc. 21debfc3dSmrg@c This is part of the GCC manual. 31debfc3dSmrg@c For copying conditions, see the file gcc.texi. 41debfc3dSmrg 51debfc3dSmrg@node Configuration Files 61debfc3dSmrg@subsubsection Files Created by @code{configure} 71debfc3dSmrg 81debfc3dSmrgHere we spell out what files will be set up by @file{configure} in the 91debfc3dSmrg@file{gcc} directory. Some other files are created as temporary files 101debfc3dSmrgin the configuration process, and are not used in the subsequent 111debfc3dSmrgbuild; these are not documented. 121debfc3dSmrg 131debfc3dSmrg@itemize @bullet 141debfc3dSmrg@item 151debfc3dSmrg@file{Makefile} is constructed from @file{Makefile.in}, together with 161debfc3dSmrgthe host and target fragments (@pxref{Fragments, , Makefile 171debfc3dSmrgFragments}) @file{t-@var{target}} and @file{x-@var{host}} from 181debfc3dSmrg@file{config}, if any, and language Makefile fragments 191debfc3dSmrg@file{@var{language}/Make-lang.in}. 201debfc3dSmrg@item 211debfc3dSmrg@file{auto-host.h} contains information about the host machine 221debfc3dSmrgdetermined by @file{configure}. If the host machine is different from 231debfc3dSmrgthe build machine, then @file{auto-build.h} is also created, 241debfc3dSmrgcontaining such information about the build machine. 251debfc3dSmrg@item 261debfc3dSmrg@file{config.status} is a script that may be run to recreate the 271debfc3dSmrgcurrent configuration. 281debfc3dSmrg@item 291debfc3dSmrg@file{configargs.h} is a header containing details of the arguments 301debfc3dSmrgpassed to @file{configure} to configure GCC, and of the thread model 311debfc3dSmrgused. 321debfc3dSmrg@item 331debfc3dSmrg@file{cstamp-h} is used as a timestamp. 341debfc3dSmrg@item 351debfc3dSmrgIf a language @file{config-lang.in} file (@pxref{Front End Config, , 361debfc3dSmrgThe Front End @file{config-lang.in} File}) sets @code{outputs}, then 371debfc3dSmrgthe files listed in @code{outputs} there are also generated. 381debfc3dSmrg@end itemize 391debfc3dSmrg 401debfc3dSmrgThe following configuration headers are created from the Makefile, 411debfc3dSmrgusing @file{mkconfig.sh}, rather than directly by @file{configure}. 421debfc3dSmrg@file{config.h}, @file{bconfig.h} and @file{tconfig.h} all contain the 431debfc3dSmrg@file{xm-@var{machine}.h} header, if any, appropriate to the host, 441debfc3dSmrgbuild and target machines respectively, the configuration headers for 451debfc3dSmrgthe target, and some definitions; for the host and build machines, 461debfc3dSmrgthese include the autoconfigured headers generated by 471debfc3dSmrg@file{configure}. The other configuration headers are determined by 481debfc3dSmrg@file{config.gcc}. They also contain the typedefs for @code{rtx}, 491debfc3dSmrg@code{rtvec} and @code{tree}. 501debfc3dSmrg 511debfc3dSmrg@itemize @bullet 521debfc3dSmrg@item 531debfc3dSmrg@file{config.h}, for use in programs that run on the host machine. 541debfc3dSmrg@item 551debfc3dSmrg@file{bconfig.h}, for use in programs that run on the build machine. 561debfc3dSmrg@item 571debfc3dSmrg@file{tconfig.h}, for use in programs and libraries for the target 581debfc3dSmrgmachine. 591debfc3dSmrg@item 601debfc3dSmrg@file{tm_p.h}, which includes the header @file{@var{machine}-protos.h} 611debfc3dSmrgthat contains prototypes for functions in the target 62a2dc1f3fSmrg@file{@var{machine}.c} file. The 63a2dc1f3fSmrg@file{@var{machine}-protos.h} header is included after the @file{rtl.h} 64a2dc1f3fSmrgand/or @file{tree.h} would have been included. 65a2dc1f3fSmrgThe @file{tm_p.h} also 661debfc3dSmrgincludes the header @file{tm-preds.h} which is generated by 671debfc3dSmrg@file{genpreds} program during the build to define the declarations 681debfc3dSmrgand inline functions for the predicate functions. 691debfc3dSmrg@end itemize 70