Move CompareModel to a separate library.

PiperOrigin-RevId: 927174846
Change-Id: Ia8b8b2c8593133d8910399be755e614282bf3252

test/user/CMakeLists.txt

@@ -14,13 +14,14 @@
 
 mujoco_test(
   user_model_test
-  ADDITIONAL_LINK_LIBRARIES absl::str_format
+  ADDITIONAL_LINK_LIBRARIES absl::str_format compare_model
 )
 
 mujoco_test(user_objects_test)
 
 mujoco_test(
   user_api_test
+  ADDITIONAL_LINK_LIBRARIES compare_model
   PROPERTIES
   ENVIRONMENT
   "MUJOCO_PLUGIN_DIR=$<TARGET_FILE_DIR:elasticity>"
@@ -28,6 +29,7 @@ mujoco_test(
 
 mujoco_test(
   user_recompile_test
+  ADDITIONAL_LINK_LIBRARIES compare_model
   PROPERTIES
   ENVIRONMENT
   "MUJOCO_PLUGIN_DIR=$<TARGET_FILE_DIR:elasticity>"

test/user/user_api_test.cc

@@ -31,6 +31,7 @@
 #include <mujoco/mjspec.h>
 #include <mujoco/mjplugin.h>
 #include "src/xml/xml_api.h"
+#include "test/compare_model.h"
 #include "test/fixture.h"
 
 namespace mujoco {

test/user/user_model_test.cc

@@ -26,6 +26,7 @@
 #include <absl/strings/str_format.h>
 #include <mujoco/mjmodel.h>
 #include <mujoco/mujoco.h>
+#include "test/compare_model.h"
 #include "test/fixture.h"
 
 namespace mujoco {

test/user/user_recompile_test.cc

@@ -29,6 +29,7 @@
 #include <mujoco/mjspec.h>
 #include "src/xml/xml_api.h"
 #include "src/xml/xml_numeric_format.h"
+#include "test/compare_model.h"
 #include "test/fixture.h"
 
 namespace mujoco {