Fix osgEarthCesium build on linux.

Had to add GLM definitions to match what Cesium uses to avoid linker errors.
Reordered the dependencies in the CMakeLists.txt so they are brought in
in the correct order to avoid linker errors down the line.

src/osgEarthCesium/CMakeLists.txt

@@ -7,7 +7,7 @@ ELSE ()
 ENDIF()
 
 # Add definitions for linking against async++ and spdlog.  Found in the cesium-omniverse project.
-ADD_DEFINITIONS(-DSPDLOG_COMPILED_LIB -DLIBASYNC_STATIC)
+ADD_DEFINITIONS(-DSPDLOG_COMPILED_LIB -DLIBASYNC_STATIC -DGLM_FORCE_XYZW_ONLY -DGLM_FORCE_EXPLICIT_CTOR -DGLM_FORCE_SIZE_T_LENGTH)
 
 set(TARGET_SRC
     AssetAccessor.cpp
@@ -80,15 +80,22 @@ LINK_WITH_VARIABLES(${LIB_NAME}
                     OSGUTIL_LIBRARY
                     OSGDB_LIBRARY
                     OSGTEXT_LIBRARY
-                    CESIUM_NATIVE_3DTILES_LIBRARY                    
+
                     CESIUM_NATIVE_3DTILES_SELECTION_LIBRARY
-                    CESIUM_NATIVE_UTILITY_LIBRARY
+                    CESIUM_NATIVE_3DTILES_CONTENT_LIBRARY
+                    CESIUM_NATIVE_3DTILES_LIBRARY                    
+                    CESIUM_NATIVE_RASTER_OVERLAYS_LIBRARY                                       
+                    CESIUM_NATIVE_GLTF_CONTENT_LIBRARY
+
                     CESIUM_NATIVE_GLTF_READER_LIBRARY
                     CESIUM_NATIVE_3DTILES_READER_LIBRARY
                     CESIUM_NATIVE_ION_CLIENT_LIBRARY
-                    CESIUM_NATIVE_GEOSPATIAL_LIBRARY
-                    CESIUM_NATIVE_GEOMETRY_LIBRARY
+                    CESIUM_NATIVE_GEOSPATIAL_LIBRARY                    
                     CESIUM_NATIVE_GLTF_LIBRARY
+                    CESIUM_NATIVE_GEOMETRY_LIBRARY
+                    CESIUM_NATIVE_ASYNC_LIBRARY
+                    CESIUM_NATIVE_UTILITY_LIBRARY
+
                     CESIUM_NATIVE_KTX_READ_LIBRARY
                     CESIUM_NATIVE_DRACO_LIBRARY
                     CESIUM_NATIVE_MESHOPTIMIZER_LIBRARY
@@ -99,13 +106,10 @@ LINK_WITH_VARIABLES(${LIB_NAME}
                     CESIUM_NATIVE_TURBOJPEG_LIBRARY
                     CESIUM_NATIVE_CSPRNG_LIBRARY
                     CESIUM_NATIVE_MODPB64_LIBRARY
-                    CESIUM_NATIVE_JSONREADER_LIBRARY
-                    CESIUM_NATIVE_ASYNC_LIBRARY
+                    CESIUM_NATIVE_JSONREADER_LIBRARY                    
                     CESIUM_NATIVE_S2GEOMETRY_LIBRARY
                     CESIUM_NATIVE_TINYXML2_LIBRARY
-                    CESIUM_NATIVE_3DTILES_CONTENT_LIBRARY
-                    CESIUM_NATIVE_GLTF_CONTENT_LIBRARY
-                    CESIUM_NATIVE_RASTER_OVERLAYS_LIBRARY
+
                     )
 LINK_CORELIB_DEFAULT(${LIB_NAME} ${CMAKE_THREAD_LIBS_INIT} ${MATH_LIBRARY})