(toplevel patch) Use canonical names for target_subdir, build_subdir.

[Nathanael Nerode <neroden@twcny.rr.com>]

Use the canonical build and target names for build_subdir and target_subdir.
This saves a tedious amount of work when we get around to autoconf 2.5x 
conversion (where build_alias and target_alias may be empty strings).

Built successfully on i686-pc-linux-gnu.  (But then, this should make no
difference at all in the native case.)

Built combined tree cross to i386-cygwin, and one to powerpc-linux.
They worked as well as they did before.

Did as much other testing as I could with the tremendous unreliability of
out-of-the-box cross builds.

This was an easy change to make, and a pain in the neck to test, due to
general breakage for crosses in src.

I wouldn't mind additional testing by people better at it than me.  I 
think I got everything which needs to change, but I'm not 100% sure.

(top level)
	* configure.in: Use canonical names for build_subdir, target_subdir.
	* configure: Regenerate.
(gcc)
	* configure.in: Use canonical names for build_subdir, target_subdir.
	* configure: Regenerate.
(gdb)
	* configure.in: Use canonical name for target_subdir.
	* configure: Regenerate.

Note that this doesn't always like to apply as a single 'patch'; it's usually
happier as three.

Index: configure.in
===================================================================
RCS file: /cvs/gcc/gcc/configure.in,v
retrieving revision 1.216
diff -u -r1.216 configure.in
--- configure.in	23 Jan 2003 22:32:25 -0000	1.216
+++ configure.in	23 Jan 2003 22:43:58 -0000
@@ -201,7 +201,7 @@
 
 # We always want to use the same name for this directory, so that dejagnu
 # can reliably find it.
-target_subdir=${target_alias}
+target_subdir=${target}
 
 if test ! -d ${target_subdir} ; then
   if mkdir ${target_subdir} ; then true
@@ -211,8 +211,7 @@
   fi
 fi
 
-build_prefix=build-
-build_subdir=${build_prefix}${build_alias}
+build_subdir=build-${build}
 
 if test x"${build_alias}" != x"${host}" ; then
   if test ! -d ${build_subdir} ; then
Index: gcc/configure.in
===================================================================
RCS file: /cvs/gcc/gcc/gcc/configure.in,v
retrieving revision 1.637
diff -u -r1.637 configure.in
--- gcc/configure.in	21 Jan 2003 13:45:07 -0000	1.637
+++ gcc/configure.in	23 Jan 2003 22:44:09 -0000
@@ -1028,7 +1028,7 @@
 	cd ..
 	rm -rf $tempdir
 	build_auto=auto-build.h
-	FORBUILD=../build-$build_alias
+	FORBUILD=../build-$build
 fi
 AC_SUBST(FORBUILD)
 
@@ -2712,7 +2712,7 @@
 host_canonical=${host}
 target_subdir=
 if test "${host}" != "${target}" ; then
-    target_subdir=${target_alias}/
+    target_subdir=${target}/
 fi
 AC_SUBST(build_canonical)
 AC_SUBST(host_canonical)
Index: gdb/configure.in
===================================================================
RCS file: /cvs/src/src/gdb/configure.in,v
retrieving revision 1.118
diff -u -r1.118 configure.in
--- gdb/configure.in	22 Jan 2003 23:50:35 -0000	1.118
+++ gdb/configure.in	23 Jan 2003 22:44:27 -0000
@@ -1204,7 +1204,7 @@
 # target_subdir is used by the testsuite to find the target libraries.
 target_subdir=
 if test "${host}" != "${target}"; then
-    target_subdir="${target_alias}/"
+    target_subdir="${target}/"
 fi
 AC_SUBST(target_subdir)