Add GCC backend glue

source/driver.cc

@@ -1,3 +1,6 @@
+// This Source Code Form is subject to the terms of the Mozilla Public License
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can
+// obtain one at http://mozilla.org/MPL/2.0/.
 #include "elna/source/driver.h"
 
 namespace elna
@@ -13,7 +16,7 @@ namespace source
     }
 
     syntax_error::syntax_error(const std::string& message,
-            const std::filesystem::path& input_file, const yy::location& location)
+            const char *input_file, const yy::location& location)
         : error(input_file, make_position(location)), message(message)
     {
     }
@@ -23,7 +26,7 @@ namespace source
         return message;
     }
 
-    driver::driver(const std::filesystem::path& input_file)
+    driver::driver(const char *input_file)
         : input_file(input_file)
     {
     }