update build.dart to set ENABLE_TRACING based on tracing property from user defines

thermion_dart/hook/build.dart

@@ -88,16 +88,14 @@ void main(List<String> args) async {
       "backend",
       "filameshio",
       "viewer",
-      if(targetOS != OS.iOS)
+      if (targetOS != OS.iOS) "filamat",
-      "filamat",
       "meshoptimizer",
       "mikktspace",
       "geometry",
       "utils",
       "filabridge",
       "gltfio_core",
-      if(targetOS != OS.android && targetOS != OS.iOS)
+      if (targetOS != OS.android && targetOS != OS.iOS) "gltfio",
-      "gltfio",
       "filament-iblprefilter",
       "image",
       "imageio",
@@ -129,9 +127,11 @@ void main(List<String> args) async {
 
     final defines = <String, String?>{
       // uncomment this to enable (very verbose) trace logging
-      // "ENABLE_TRACING": "1"
+      "ENABLE_TRACING": input.userDefines["tracing"] == null ? "0" : "1"
     };
 
+    
+
     var frameworks = [];
     if (platform != "windows") {
       flags.addAll(['-std=c++17']);
@@ -200,8 +200,8 @@ void main(List<String> args) async {
           : ['native/include', 'native/include/filament'],
       defines: platform == "windows" ? {} : defines,
       flags: [
-        if (platform == "macos") '-mmacosx-version-min=13.0',
+        if (targetOS == OS.macOS) ...['-mmacosx-version-min=13.0'],
-        if (platform == "ios") '-mios-version-min=13.0',
+        if (targetOS == OS.iOS) '-mios-version-min=13.0',
         ...flags,
         ...frameworks,
         if (platform != "windows") ...[