Merged in merge23 (pull request #153)

Merge 2 -> 3 (pr #152)

Approved-by: Steve Peters <scpeters@osrfoundation.org>

Author: scpeters

Changelog.md

@@ -7,6 +7,9 @@
     * [Issue 24](https://bitbucket.org/ignitionrobotics/ign-msgs/issues/24)
     * [Issue 27](https://bitbucket.org/ignitionrobotics/ign-msgs/issues/27)
 
+1. Fix linking order of Protocol Buffers static libraries on GCC
+    * [Pull request 151](https://bitbucket.org/ignitionrobotics/ign-msgs/pull-request/151)
+
 ### Ignition Msgs 3.2.0
 
 1. Added Pose_V, Time, and Clock fields to packet.proto
@@ -62,6 +65,14 @@
 
 ### Ignition Msgs 2.x.x
 
+1. Fix linking order of Protocol Buffers static libraries on GCC
+    * [Pull request 151](https://bitbucket.org/ignitionrobotics/ign-msgs/pull-request/151)
+
+### Ignition Msgs 2.1.0
+
+1. Upgrade to ign-math6
+    * [Pull request 138](https://bitbucket.org/ignitionrobotics/ign-msgs/pull-request/138)
+
 
 ### Ignition Msgs 2.0.0
 

Migration.md

@@ -50,7 +50,16 @@ release will remove the deprecated code.
 ### Removals
 
 
-## Ignition Msgs 1.X to 2.X
+## Ignition Msgs 2.0 to 2.1
+
+### Modifications
+
+1. Use `ignition-math6` instead of `ignition-math5`.
+  This implies an indirect dependency on `ignition-cmake2` and cmake 3.10.2,
+  which are not available on Ubuntu Xenial, so migration to Ubuntu Bionic may
+  be required.
+
+## Ignition Msgs 1.X to 2.0
 
 ### Additions
 

src/CMakeLists.txt

@@ -2,8 +2,8 @@
 # Build a custom protoc plugin
 ign_add_executable(ign_msgs_gen Generator.cc generator_main.cc)
 target_link_libraries(ign_msgs_gen
-  protobuf::libprotobuf
-  protobuf::libprotoc)
+  protobuf::libprotoc
+  protobuf::libprotobuf)
 target_include_directories(ign_msgs_gen PRIVATE ${PROTOBUF_INCLUDE_DIR})
 target_compile_features(ign_msgs_gen PRIVATE ${IGN_CXX_11_FEATURES})