re PR bootstrap/48120 (libpwl test must use g++)

	PR bootstrap/48120:
	* configure.ac (pwllib): Use LIBS instead of LDFLAGS.
	Add -lstdc++ -lm to LIBS.
	* configure: Regenerate.

From-SVN: r171225

ChangeLog

+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

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"

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"