Add CanBuild to target for selective project references compilation

Source/Tools/Flax.Build/Build/NativeCpp/Builder.NativeCpp.cs

@@ -638,13 +638,18 @@ namespace Flax.Build
                 Log.Verbose("No target selected for build");
                 return;
             }
-            if (!target.Platforms.Contains(buildData.Platform.Target) || !target.Architectures.Contains(buildData.Architecture))
-            {
-                Log.Verbose($"Referenced target {reference.Project.Name} doesn't support {buildData.Platform.Target} {buildData.Architecture}");
-                return;
-            }
             if (!buildContext.TryGetValue(target, out var referencedBuildData))
             {
+                if (!target.CanBuild(buildData.TargetOptions))
+                {
+                    Log.Verbose($"Referenced target {reference.Project.Name} doesn't build for {buildData.Platform.Target} {buildData.Architecture} {buildData.Configuration}");
+                    return;
+                }
+                if (!target.Platforms.Contains(buildData.Platform.Target) || !target.Architectures.Contains(buildData.Architecture))
+                {
+                    Log.Verbose($"Referenced target {reference.Project.Name} doesn't support {buildData.Platform.Target} {buildData.Architecture}");
+                    return;
+                }
                 Log.Info($"Building referenced target {reference.Project.Name}");
 
                 // Build target
@@ -706,6 +711,11 @@ namespace Flax.Build
             }
             if (!buildContext.TryGetValue(target, out var referencedBuildData))
             {
+                if (!target.CanBuild(buildData.TargetOptions))
+                {
+                    Log.Verbose($"Referenced target {reference.Project.Name} doesn't build for {buildData.Platform.Target} {buildData.Architecture} {buildData.Configuration}");
+                    return;
+                }
                 Log.Info($"Building referenced target {reference.Project.Name}");
 
                 // Build target

Source/Tools/Flax.Build/Build/Target.cs

@@ -207,6 +207,16 @@ namespace Flax.Build
             return projectTargets.Length != 0 ? projectTargets[0] : null;
         }
 
+        /// <summary>
+        /// Checks if this target can be built for a given build options. Can be used to skip compiling for unsupported platforms or unused configurations (eg. development-only plugins).
+        /// </summary>
+        /// <param name="options">The build options.</param>
+        /// <returns>True if can build target, otherwise false.</returns>
+        public virtual bool CanBuild(BuildOptions options)
+        {
+            return true;
+        }
+
         /// <summary>
         /// Gets the output file path.
         /// </summary>