libraries should be always prepended to $LIBS, never appended

configure.in

@@ -735,7 +735,7 @@ AC_ARG_WITH(libwrap,
 
     _libs=${LIBS}
     AC_CHECK_HEADER(tcpd.h,
-      LIBS="$LIBS -lwrap"
+      LIBS="-lwrap $LIBS"
       AC_MSG_CHECKING(for TCP wrappers library -lwrap)
       AC_TRY_LINK([#include <tcpd.h>
 int allow_severity = 0;
@@ -1231,7 +1231,7 @@ fi
 AC_MSG_CHECKING("named thread libs:")
 if test "$with_named_thread" != "no"
 then
-  LIBS="$with_named_thread $LIBS $with_named_thread"
+  LIBS="$with_named_thread $LIBS"
   with_posix_threads="yes"
   with_mit_threads="no"
   AC_MSG_RESULT("$with_named_thread")
@@ -1250,7 +1250,7 @@ else
     then
       AC_MSG_CHECKING("for pthread_create in -lpthread");
       ac_save_LIBS="$LIBS"
-      LIBS="$LIBS -lpthread"
+      LIBS="-lpthread $LIBS"
       AC_TRY_LINK(
       [#include <pthread.h>],
       [ (void) pthread_create((pthread_t*) 0,(pthread_attr_t*) 0, 0, 0); ],
@@ -1258,7 +1258,7 @@ else
       AC_MSG_RESULT("$with_posix_threads")
       if test "$with_posix_threads" = "no"
       then
-        LIBS=" $ac_save_LIBS -lpthreads"
+        LIBS=" -lpthreads $ac_save_LIBS"
         AC_MSG_CHECKING("for pthread_create in -lpthreads");
         AC_TRY_LINK(
         [#include <pthread.h>],