Merge pull request #2788 from jjhursey/topic/libevent-conf

libevent2022: Fix broken configure AC_LANG_PROGRAM

Author: jjhursey

opal/mca/event/libevent2022/libevent/configure.ac

@@ -611,8 +611,6 @@ if test "$enable_epoll" != "no" ; then
 AC_INCLUDES_DEFAULT
 #include <sys/epoll.h>
 ],[[
-int main(int argc, char **argv)
-{
     struct epoll_event epevin;
     struct epoll_event epevout;
     int res;
@@ -640,7 +638,6 @@ int main(int argc, char **argv)
         }
     }
     /* SUCCESS */
-}
 ]])],
         [haveepoll=yes
         # OMPI: Don't use AC_LIBOBJ