diff --git a/ChangeLog b/ChangeLog
index ee4c378bf..bf8f64995 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2011-03-21  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR bootstrap/48120:
+	* configure.ac (pwllib): Use LIBS instead of LDFLAGS.
+	Add -lstdc++ -lm to LIBS.
+	* configure: Regenerate.
+
 2011-03-18  David Edelsohn  <dje.gcc@gmail.com>
 
 	* config.guess: Update to version 2011-02-02
diff --git a/configure b/configure
index 5e97d0f6d..501caf060 100755
--- a/configure
+++ b/configure
@@ -5725,8 +5725,8 @@ fi
 
 if test "x$with_ppl" != xno; then
   if test "x$pwllib" = x; then
-    saved_LDFLAGS="$LDFLAGS"
-    LDFLAGS="$LDFLAGS $ppllibs"
+    saved_LIBS="$LIBS"
+    LIBS="$LIBS $ppllibs -lstdc++ -lm"
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PWL_handle_timeout in -lpwl" >&5
 $as_echo_n "checking for PWL_handle_timeout in -lpwl... " >&6; }
 if test "${ac_cv_lib_pwl_PWL_handle_timeout+set}" = set; then :
@@ -5767,7 +5767,7 @@ if test "x$ac_cv_lib_pwl_PWL_handle_timeout" = x""yes; then :
   pwllib="-lpwl"
 fi
 
-    LDFLAGS="$saved_LDFLAGS"
+    LIBS="$saved_LIBS"
   fi
 
   ppllibs="$ppllibs -lppl_c -lppl $pwllib -lgmpxx"
diff --git a/configure.ac b/configure.ac
index 233ce0a76..e036b5f50 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1677,10 +1677,10 @@ fi
 
 if test "x$with_ppl" != xno; then
   if test "x$pwllib" = x; then
-    saved_LDFLAGS="$LDFLAGS"
-    LDFLAGS="$LDFLAGS $ppllibs"
-    AC_CHECK_LIB(pwl,PWL_handle_timeout,[pwllib="-lpwl"])
-    LDFLAGS="$saved_LDFLAGS"
+    saved_LIBS="$LIBS"
+    LIBS="$LIBS $ppllibs -lstdc++ -lm"
+    AC_CHECK_LIB(pwl, PWL_handle_timeout, [pwllib="-lpwl"])
+    LIBS="$saved_LIBS"
   fi
 
   ppllibs="$ppllibs -lppl_c -lppl $pwllib -lgmpxx"