--- rpl/Attic/configure.in	2011/09/20 19:31:15	1.90
+++ rpl/Attic/configure.in	2011/09/21 09:09:21	1.91
@@ -211,21 +211,27 @@ if test "$enableval" = "no"; then
 else
 	IPCS_SYSV=yes
 fi],
-[AC_MSG_CHECKING([for POSIX semaphores])
+REG=$LDFLAGS
+LDFLAGS=-lrt
+[AC_MSG_CHECKING([for POSIX semaphores and shared objects])
 AC_RUN_IFELSE(
 [AC_LANG_PROGRAM([#include <sys/mman.h>
 #include <sys/stat.h>
 #include <fcntl.h>
  ],
-[ int fd; char *sem = "/sem.test";
+[ int fd; char *sem = "/test";
 fd = shm_open(sem , O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
   close(fd);
   shm_unlink(sem);
+  fd = sem_open(sem, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR, 0);
+  close(fd);
+  sem_unlink(sem);
   return(0);
 ])],
 [IPCS_SYSV=-UIPCS_SYSV; AC_MSG_RESULT(yes)],
 [IPCS_SYSV=-DIPCS_SYSV; AC_MSG_RESULT(no)]
 	)]
+LDFLAGS=$REG
 )
 
 if test "$IPCS_SYSV" = "-UIPCS_SYSV"; then