gps: gpsd: Adding gpsd_iface to interface with gpsd.

The gpsd_iface class might be useful for more than just e3x0,
it therefore belongs into lib/usrp instead of lib/usrp/e300.

A new UHD component is being registered, to cope with the additional
dependency. If libgps is not found, UHD and E300 will be compiled
without GPS support.

This has several consequences:
- The E310 GPSDO should now work transparently over network
- Users can use the GPS through gpsd for other applications
  *while* running UHD applications
- We now have a dependency on libgps

We need currently at least version 3.11 (while running 3.14),
on the device. Older versions do work if 3.10 runs on both
sides e.g

Reviewed-by: Martin Braun <martin.braun@ettus.com>
Reviewed-by: Ashish Chaudhari <ashish.chaudhari@ettus.com>
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/host/lib/usrp/gpsd_iface.hpp b/host/lib/usrp/gpsd_iface.hpp
new file mode 100644
index 000000000..7d934ae5c
--- /dev/null
+++ b/host/lib/usrp/gpsd_iface.hpp
@@ -0,0 +1,36 @@
+//
+// Copyright 2015 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_GPSD_IFACE_HPP
+#define INCLUDED_GPSD_IFACE_HPP
+
+#include <boost/cstdint.hpp>
+#include <boost/shared_ptr.hpp>
+
+#include <uhd/usrp/gps_ctrl.hpp>
+
+namespace uhd { namespace usrp {
+
+class gpsd_iface : public virtual uhd::gps_ctrl {
+public:
+    typedef boost::shared_ptr<gpsd_iface> sptr;
+    static sptr make(const std::string &addr, boost::uint16_t port);
+};
+
+}};
+
+#endif /* INCLUDED_GPSD_IFACE_HPP */