lei: wire up pure Perl sendmsg/recvmsg for Linux users

This enables lei-daemon to work without Inline::C nor
Socket::MsgHdr installed.  Prior to this, only the `lei' client
was using the pure Perl implementation.  Either C implementation
is still marginally faster, however.

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 9ab91714..4bd9183e 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -1277,6 +1277,9 @@ sub lazy_start {
                         require PublicInbox::CmdIPC4;
                         $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
                         PublicInbox::CmdIPC4->can('recv_cmd4');
+                } // do {
+                        $send_cmd = PublicInbox::Syscall->can('send_cmd4');
+                        PublicInbox::Syscall->can('recv_cmd4');
                 };
         }
         $recv_cmd or die <<"";