log: Split add_logger() out of the main logging header

This way, C++11 features are not required to build with UHD headers
included.

4 files changed, 48 insertions, 14 deletions

diff --git a/host/include/uhd/utils/log.hpp b/host/include/uhd/utils/log.hpp
index 24c7bc1c6..58b3afed4 100644
--- a/host/include/uhd/utils/log.hpp
+++ b/host/include/uhd/utils/log.hpp
@@ -153,13 +153,6 @@ namespace uhd {
             std::string message;
         };
 
-        /*! Logging function type
-         *
-         * Every logging_backend has to define a function with this signature.
-         * Can be added to the logging core.
-         */
-        typedef std::function<void(const uhd::log::logging_info&)> log_fn_t ;
-
         /*! Set the global log level
          *
          * The global log level gets applied before the specific log level.
@@ -188,13 +181,6 @@ namespace uhd {
          * \throws uhd::key_error if \p logger was not defined
          */
         UHD_API void set_logger_level(const std::string &logger, uhd::log::severity_level level);
-
-        /*! Add logging backend to the log system
-         *
-         * \param key Identifies the logging backend in the logging core
-         * \param logger_fn function which actually logs messages to this backend
-         */
-        UHD_API void add_logger(const std::string &key, log_fn_t logger_fn);
     }
 }
 
diff --git a/host/include/uhd/utils/log_add.hpp b/host/include/uhd/utils/log_add.hpp
new file mode 100644
index 000000000..99b2e6dfc
--- /dev/null
+++ b/host/include/uhd/utils/log_add.hpp
@@ -0,0 +1,46 @@
+//
+// Copyright 2017 Ettus Research (National Instruments Corp.)
+//
+// 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/>.
+//
+
+// Note: Including this file requires C++11 features enabled.
+
+#ifndef INCLUDED_UHD_UTILS_LOG_ADD_HPP
+#define INCLUDED_UHD_UTILS_LOG_ADD_HPP
+
+#include <uhd/config.hpp>
+#include <uhd/utils/log.hpp>
+#include <functional>
+
+namespace uhd {
+    namespace log {
+
+        /*! Logging function type
+         *
+         * Every logging_backend has to define a function with this signature.
+         * Can be added to the logging core.
+         */
+        typedef std::function<void(const uhd::log::logging_info&)> log_fn_t ;
+
+        /*! Add logging backend to the log system
+         *
+         * \param key Identifies the logging backend in the logging core
+         * \param logger_fn function which actually logs messages to this backend
+         */
+        UHD_API void add_logger(const std::string &key, log_fn_t logger_fn);
+    }
+} /* namespace uhd::log */
+
+#endif /* INCLUDED_UHD_UTILS_LOG_ADD_HPP */
diff --git a/host/lib/utils/log.cpp b/host/lib/utils/log.cpp
index bfa012323..e850d1374 100644
--- a/host/lib/utils/log.cpp
+++ b/host/lib/utils/log.cpp
@@ -16,6 +16,7 @@
 //
 
 #include <uhd/utils/log.hpp>
+#include <uhd/utils/log_add.hpp>
 #include <uhd/utils/static.hpp>
 #include <uhd/utils/paths.hpp>
 #include <uhd/transport/bounded_buffer.hpp>
diff --git a/host/tests/log_test.cpp b/host/tests/log_test.cpp
index c466777fc..b0b17ea84 100644
--- a/host/tests/log_test.cpp
+++ b/host/tests/log_test.cpp
@@ -17,6 +17,7 @@
 
 #include <boost/test/unit_test.hpp>
 #include <uhd/utils/log.hpp>
+#include <uhd/utils/log_add.hpp>
 #include <iostream>
 
 BOOST_AUTO_TEST_CASE(test_messages){