From: James Turner <zakalawe@mac.com>
Date: Mon, 17 Jun 2013 17:11:47 +0000 (+0100)
Subject: Fix issues with explicit GPS instruments.
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=5ac8bc01a11b96ca54e9de58f32525c2e041939e;p=flightgear.git

Fix issues with explicit GPS instruments.

For 2.12, ensure all GPS instruments are backwards
compatible, however they were requested. Post release we can create a new instrument name with the compatibility code disabled.
---

diff --git a/src/Instrumentation/instrument_mgr.cxx b/src/Instrumentation/instrument_mgr.cxx
index ec8aa69ec..80724e3a6 100644
--- a/src/Instrumentation/instrument_mgr.cxx
+++ b/src/Instrumentation/instrument_mgr.cxx
@@ -142,7 +142,11 @@ bool FGInstrumentMgr::build (SGPropertyNode* config_props)
             set_subsystem( id, new Altimeter( node, "encoder" ), 0.15 );
 
         } else if ( name == "gps" ) {
-            set_subsystem( id, new GPS( node ) );
+            // post 2.12.0, add a new name (distinct from 'gps'), so
+            // it is possible to create non-default GPS instruments.
+            // then authors of realistic GPS and FMSs can transition to using
+            // that name as they choose.
+            set_subsystem( id, new GPS( node, true /* default GPS mode */ ) );
             _explicitGps = true;
         } else if ( name == "gsdi" ) {
             set_subsystem( id, new GSDI( node ) );