(toplevel patch) introduce extra_host_args

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

Diffed to apply after my outstanding patches.  For gcc3.4b-i-b, will hit src
when that branch lands, etc.  Tested on i686-pc-linux-gnu.

This hits a lot of points but doesn't do much, so I separated it out in 
advance of the larger patch to configure subdirectories in the Makefile.

	* configure.in: Introduce $extra_host_args for non-command-line 
	options passed to subconfigures.

--- configure.in.current	2002-11-27 22:36:37.000000000 -0500
+++ configure.in	2002-11-27 22:38:43.000000000 -0500
@@ -33,6 +33,7 @@
 
 ##############################################################################
 
+extra_host_args=
 # Define the trigger file to make sure configure will re-run whenever
 # the gcc version number changes.
 if [ "${with_gcc_version_trigger+set}" = set ]; then
@@ -51,7 +52,7 @@
 	    arguments="--with-gcc-version-trigger=$gcc_version_trigger $arguments"
 	    ;;
 	esac
-	withoptions="--with-gcc-version-trigger=$gcc_version_trigger $withoptions"
+	extra_host_args="--with-gcc-version-trigger=$gcc_version_trigger $extra_host_args"
     fi
 fi
 
@@ -1208,21 +1209,21 @@
 if test x${use_gnu_as} = x &&
    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
   with_gnu_as=yes
-  withoptions="$withoptions --with-gnu-as"
+  extra_host_args="$extra_host_args --with-gnu-as"
 fi
 
 if test x${use_gnu_ld} = x &&
    echo " ${configdirs} " | grep " ld " > /dev/null 2>&1 ; then
   with_gnu_ld=yes
-  withoptions="$withoptions --with-gnu-ld"
+  extra_host_args="$extra_host_args --with-gnu-ld"
 fi
 
-# If using newlib, add --with-newlib to the withoptions so that gcc/configure
+# If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
 # can detect this case.
 
 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
   with_newlib=yes
-  withoptions="$withoptions --with-newlib"
+  extra_host_args="$extra_host_args --with-newlib"
 fi
 
 # We default to --with-shared on platforms where -fpic is meaningless.
@@ -1249,13 +1250,13 @@
   case "${target}" in
   mips*-*-irix6*o32)
     with_stabs=yes;
-    withoptions="${withoptions} --with-stabs"
+    extra_host_args="${extra_host_args} --with-stabs"
     ;;
   mips*-*-irix6*)
     ;;
   mips*-*-* | alpha*-*-osf*)
     with_stabs=yes;
-    withoptions="${withoptions} --with-stabs"
+    extra_host_args="${extra_host_args} --with-stabs"
     ;;
   esac
 fi
@@ -1264,10 +1265,14 @@
 # them automatically.
 case "${host}" in
   hppa*64*-*-hpux11*)	
-    withoptions="$withoptions -x-libraries=/usr/lib/pa20_64 -x-includes=/usr/X11R6/include"
+    extra_host_args="$extra_host_args -x-libraries=/usr/lib/pa20_64 -x-includes=/usr/X11R6/include"
     ;;
 esac
 
+# Now add the extra_host_args to the withoptions.  This will go away when
+# we start configuring from the Makefile.
+withoptions="$extra_host_args $withoptions"
+
 # If we aren't going to be using gcc, see if we can extract a definition
 # of CC from the fragment.
 # Actually, use the 'pre-extracted' version above.