Index: configure
--- configure.orig
+++ configure
@@ -20542,7 +20542,7 @@ CPPFLAGS=$boost_thread_save_CPPFLAGS
 
 
 
-LDFLAGS+="$LDFLAGS $BOOST_THREAD_LDFLAGS"
+LDFLAGS="$LDFLAGS $BOOST_THREAD_LDFLAGS"
 LIBS="$LIBS $BOOST_THREAD_LIBS"
 
 # icu