[committed] document config.build minimally

[neroden at twcny dot rr dot com (Nathanael Nerode)]

This is minimal, but at least prevents the documentation level from regressing.
Committed.

	* doc/fragments.texi, doc/sourcebuild.texi: Mention new file
	config.build.

Index: fragments.texi
===================================================================
RCS file: /cvs/gcc/gcc/gcc/doc/fragments.texi,v
retrieving revision 1.5
diff -u -r1.5 fragments.texi
--- fragments.texi	13 Apr 2003 16:59:44 -0000	1.5
+++ fragments.texi	31 Aug 2003 18:54:12 -0000
@@ -13,7 +13,7 @@
 fragments from the @file{config} directory.  These are used to set
 Makefile parameters that are not amenable to being calculated by
 autoconf.  The list of fragments to incorporate is set by
-@file{config.gcc}; @xref{System Config}.
+@file{config.gcc} (and occasionally @file{config.build}); @xref{System Config}.
 
 Fragments are named either @file{t-@var{target}} or @file{x-@var{host}},
 depending on whether they are relevant to configuring GCC to produce
Index: sourcebuild.texi
===================================================================
RCS file: /cvs/gcc/gcc/gcc/doc/sourcebuild.texi,v
retrieving revision 1.28
diff -u -r1.28 sourcebuild.texi
--- sourcebuild.texi	1 Aug 2003 21:53:22 -0000	1.28
+++ sourcebuild.texi	31 Aug 2003 18:54:16 -0000
@@ -175,7 +175,7 @@
 
 @menu
 * Config Fragments::     Scripts used by @file{configure}.
-* System Config::        The @file{config.gcc} file.
+* System Config::        The @file{config.build} and @file{config.gcc} files.
 * Configuration Files::  Files created by running @file{configure}.
 @end menu
 
@@ -191,10 +191,12 @@
 the top level one) used?
 
 @item The file @file{config.gcc} is used to handle configuration
-specific to the particular build, host or target machine.  (In
-general, this should only be used for features that cannot reasonably
-be tested in Autoconf feature tests.)  @xref{System Config, , The
-@file{config.gcc} File}, for details of the contents of this file.
+specific to the particular host or target machine.  The file 
+@file{config.build} is used to handle configuration specific to the 
+particular build machine.  (In general, these should only be used for 
+features that cannot reasonably be tested in Autoconf feature tests.)
+@xref{System Config, , The @file{config.build} and @file{config.gcc} Files},
+for details of the contents of these files.
 
 @item Each language subdirectory has a file
 @file{@var{language}/config-lang.in} that is used for
@@ -206,9 +208,9 @@
 @end itemize
 
 @node System Config
-@subsubsection The @file{config.gcc} File
+@subsubsection The @file{config.build} and @file{config.gcc} Files
 
-FIXME: document the contents of this file, and what variables should
+FIXME: document the contents of these files, and what variables should
 be set to control build, host and target configuration.
 
 @include configfiles.texi

-- 
Nathanael Nerode  <neroden at gcc.gnu.org>
http://home.twcny.rr.com/nerode/neroden/fdl.html