Force Abseil's SourceLocation implementation for compatibility with clang 13/14.

PiperOrigin-RevId: 935926249
Change-Id: I063544e37eb735d0461a20c2ede7e23ea28d23bc

cmake/MujocoDependencies.cmake

@@ -278,6 +278,9 @@ if(MUJOCO_BUILD_TESTS OR MUJOCO_BUILD_STUDIO OR MUJOCO_USE_FILAMENT)
       CACHE INTERNAL "Build tests."
   )
 
+  set(ABSL_PATCH_COMMAND
+    git apply --reject --whitespace=fix ${mujoco_SOURCE_DIR}/cmake/abseil-cpp-source_location.patch
+  )
   set(ABSL_BUILD_TESTING OFF)
   findorfetch(
     USE_SYSTEM_PACKAGE
@@ -293,6 +296,8 @@ if(MUJOCO_BUILD_TESTS OR MUJOCO_BUILD_STUDIO OR MUJOCO_USE_FILAMENT)
     TARGETS
     absl::core_headers
     EXCLUDE_FROM_ALL
+    PATCH_COMMAND
+    ${ABSL_PATCH_COMMAND}
   )
 
   set(BUILD_TESTING

cmake/abseil-cpp-source_location.patch

@@ -0,0 +1,11 @@
+diff --git a/absl/base/options.h b/absl/base/options.h
+--- a/absl/base/options.h
++++ b/absl/base/options.h
+@@ -99,6 +99,6 @@
+ // the source location type is an alias of std::source_location type, use the
+ // feature macro ABSL_USES_STD_SOURCE_LOCATION.
+ //
+-#define ABSL_OPTION_USE_STD_SOURCE_LOCATION 2
++#define ABSL_OPTION_USE_STD_SOURCE_LOCATION 0
+ 
+ // ABSL_OPTION_USE_STD_ORDERING