--- libosip2-2.2.0/configure.in.orig	2005-01-31 16:44:06.000000000 +0100
+++ libosip2-2.2.0/configure.in	2005-02-27 20:30:16.277563216 +0100
@@ -170,10 +170,10 @@
 fi
 
 dnl Checks for libraries. (those one are needed for sun)
-AC_CHECK_LIB(posix4,sem_open,[FSM_LIB="$FSM_LIB -lposix4 -mt"])
-AC_CHECK_LIB(nsl,nis_add,[FSM_LIB="$FSM_LIB -lnsl"])
-AC_CHECK_LIB(socket,sendto,[FSM_LIB="$FSM_LIB -lsocket"])
-AC_CHECK_LIB(c, lrand48, AC_DEFINE([HAVE_LRAND48], [], [Defined if you have lrand48]))
+AC_CHECK_FUNC(sem_open, , [AC_CHECK_LIB(posix4,sem_open,[FSM_LIB="$FSM_LIB -lposix4 -mt"])])
+AC_CHECK_FUNC(gethostbyname, , [AC_CHECK_LIB(nsl,nis_add,[FSM_LIB="$FSM_LIB -lnsl"])])
+AC_CHECK_FUNC(sendto, , [AC_CHECK_LIB(socket,sendto,[FSM_LIB="$FSM_LIB -lsocket"])])
+AC_CHECK_LIB(c, lrand48, [AC_DEFINE([HAVE_LRAND48], [], [Defined if you have lrand48])])
 
 AC_CACHE_CHECK([whether -Wall works], Wall_flag, [
   saved_CPPFLAGS=$CPPFLAGS