Some more libevent configure fixes. Ensure -levent gets added to the wrapper flags as the LANL machines can't seem to find it otherwise. Remove the duplicate evaluation of --visibility in the libevent area as it was already done by opal for everyone. Set some more ignores.

This commit was SVN r26485.

opal/mca/event/libevent2019/configure.m4

@@ -33,7 +33,7 @@ AC_DEFUN([MCA_opal_event_libevent2019_CONFIG],[
     CPPFLAGS="-I$OMPI_TOP_SRCDIR -I$OMPI_TOP_BUILDDIR -I$OMPI_TOP_SRCDIR/opal/include $CPPFLAGS"
 
     AC_MSG_CHECKING([libevent configuration args])
-    event_args="--disable-dns --disable-http --disable-rpc --disable-openssl --enable-hidden-symbols"
+    event_args="--disable-dns --disable-http --disable-rpc --disable-openssl"
 
     AC_ARG_ENABLE(event-rtsig,
         AC_HELP_STRING([--enable-event-rtsig],
@@ -176,6 +176,7 @@ EOF
            # compilers (in the --with-devel-headers case).
            file=$basedir/libevent
            opal_event_libevent2019_ADD_CPPFLAGS="-I$OMPI_TOP_SRCDIR/$file -I$OMPI_TOP_SRCDIR/$file/include"
+           opal_event_libevent2019_ADD_WRAPPER_EXTRA_LDFLAGS="-levent"
            AS_IF([test "$OMPI_TOP_BUILDDIR" != "$OMPI_TOP_SRCDIR"],
                  [opal_event_libevent2019_ADD_CPPFLAGS="$opal_event_libevent2019_ADD_CPPFLAGS -I$OMPI_TOP_BUILDDIR/$file/include"])
            if test "$with_devel_headers" = "yes" ; then

opal/mca/event/libevent2019/libevent/config.h.in

@@ -368,9 +368,6 @@
 /* Numeric representation of the version */
 #undef NUMERIC_VERSION
 
-/* Whether C compiler supports symbol visibility or not */
-#undef OPAL_C_HAVE_VISIBILITY
-
 /* Name of package */
 #undef PACKAGE
 

opal/mca/event/libevent2019/libevent/configure.in

@@ -141,10 +141,6 @@ AC_ARG_ENABLE([signal],
               [AS_HELP_STRING([--disable-signal], [disable signal support])],
               [], [enable_signal=yes])
 
-AC_ARG_ENABLE([hidden-symbols],
-              [AS_HELP_STRING([--enable-hidden-symbols], 
-                             [Use linker "visibility" functionality to hide libevent symbols])],
-              [], [enable_hidden_symbols=no])
 dnl   ****** END Open MPI Changes ******
 
 AC_PROG_LIBTOOL
@@ -424,12 +420,6 @@ fi
 
 AC_CHECK_SIZEOF(long)
 
-dnl   ****** Open MPI Changes ******
-dnl See if we need to check and set visibility capabilities
-AS_IF([test "$enable_hidden_symbols" = "yes"],
-      [OPAL_CHECK_VISIBILITY])
-dnl   ****** END Open MPI Changes ******
-
 AC_MSG_CHECKING(for F_SETFD in fcntl.h)
 AC_EGREP_CPP(yes,
 [