1 files changed, 66 insertions, 1 deletions
diff --git a/Firestore/core/src/firebase/firestore/util/CMakeLists.txt b/Firestore/core/src/firebase/firestore/util/CMakeLists.txt
index ce81363..3028a95 100644
--- a/Firestore/core/src/firebase/firestore/util/CMakeLists.txt
+++ b/Firestore/core/src/firebase/firestore/util/CMakeLists.txt
@@ -12,8 +12,73 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# firebase_firestore_util is the interface of this module. The rest of the
+# libraries in here are an implementation detail of making this a
+# mutli-platform build.
+
+add_library(
+  firebase_firestore_util_base
+  secure_random_arc4random.cc
+  string_printf.cc
+)
+target_link_libraries(
+  firebase_firestore_util_base
+  PUBLIC
+  absl_base
+)
+
+# stdio-dependent bits can be built and tested everywhere
+add_library(
+  firebase_firestore_util_stdio
+  assert_stdio.cc
+  log_stdio.cc
+)
+target_link_libraries(
+  firebase_firestore_util_stdio
+  PUBLIC
+  firebase_firestore_util_base
+)
+
+# apple-dependent bits can only built and tested on apple plaforms
+if(APPLE)
+  add_library(
+    firebase_firestore_util_apple
+    assert_apple.mm
+    log_apple.mm
+  )
+  target_compile_options(
+    firebase_firestore_util_apple
+    PRIVATE
+    ${OBJC_FLAGS}
+  )
+  target_link_libraries(
+    firebase_firestore_util_apple
+    PUBLIC
+    FirebaseCore
+  )
+endif(APPLE)
+
 add_library(
   firebase_firestore_util
   autoid.cc
-  secure_random_arc4random.cc
 )
+
+# Export a dependency on the correct logging library for this platform. All
+# buildable libraries are built and tested but only the best fit is exported.
+if(APPLE)
+  target_link_libraries(
+    firebase_firestore_util
+    PUBLIC
+    firebase_firestore_util_apple
+    firebase_firestore_util_base
+  )
+
+else(NOT APPLE)
+  target_link_libraries(
+    firebase_firestore_util
+    PUBLIC
+    firebase_firestore_util_stdio
+    firebase_firestore_util_base
+  )
+
+endif(APPLE)