diff --git a/ChangeLog b/ChangeLog
index 2e8fb30ae84..bfe6a22d012 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2010-04-01  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	PR bootstrap/43615
+	PR bootstrap/43328
+
+	Revert:
+
+	2010-03-31  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	* configure.ac: Do not pass --enable-multilib nor
+	--disable-multilib in baseargs.  Accept explicitly passed
+	--enable_multilib.
+	* configure: Regenerate.
+
 2010-03-31  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* MAINTAINERS (CPU Port Maintainers): Add myself for spu port.
diff --git a/configure b/configure
index d885973ce6f..c2c406e7334 100755
--- a/configure
+++ b/configure
@@ -7778,9 +7778,6 @@ do
       skip_next=$separate_arg
       continue
       ;;
-    --enable-multilib | --disable-multilib)
-      continue
-      ;;
     -*)
       # An option.  Add it.
       case $ac_arg in
@@ -7849,12 +7846,10 @@ if test x${is_cross_compiler} = xyes ; then
   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
 fi
 
-# Pass --enable-multilib to target dirs; default to --enable-multilib.
-case $enable_multilib in
-'' | yes)
+# Default to --enable-multilib.
+if test x${enable_multilib} = x ; then
   target_configargs="--enable-multilib ${target_configargs}"
-  ;;
-esac
+fi
 
 # Pass --with-newlib if appropriate.  Note that target_configdirs has
 # changed from the earlier setting of with_newlib.
diff --git a/configure.ac b/configure.ac
index 55e99980adc..72407f86878 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2882,9 +2882,6 @@ do
       skip_next=$separate_arg
       continue
       ;;
-    --enable-multilib | --disable-multilib)
-      continue
-      ;;
     -*)
       # An option.  Add it.
       case $ac_arg in
@@ -2953,12 +2950,10 @@ if test x${is_cross_compiler} = xyes ; then
   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
 fi
 
-# Pass --enable-multilib to target dirs; default to --enable-multilib.
-case $enable_multilib in
-'' | yes)
+# Default to --enable-multilib.
+if test x${enable_multilib} = x ; then
   target_configargs="--enable-multilib ${target_configargs}"
-  ;;
-esac
+fi
 
 # Pass --with-newlib if appropriate.  Note that target_configdirs has
 # changed from the earlier setting of with_newlib.