CLTests: Add test for USE_HOST_PTR; fix build warnings

compile/clzerocopycheck.cpp

@@ -1,3 +1,4 @@
+#define CL_TARGET_OPENCL_VERSION 300
 #include <CL/cl.h>
 #include <iostream>
 #include <vector>
@@ -32,8 +33,9 @@ int main() {
     cl_context ctx = clCreateContext(nullptr, 1, &dev, nullptr, nullptr, &err);
     CHECK(err, "clCreateContext");
 
-    cl_command_queue q = clCreateCommandQueue(ctx, dev, 0, &err);
-    CHECK(err, "clCreateCommandQueue");
+    cl_queue_properties queueProps[] = {CL_QUEUE_PROPERTIES, 0, 0};
+    cl_command_queue q = clCreateCommandQueueWithProperties(ctx, dev, queueProps, &err);
+    CHECK(err, "clCreateCommandQueueWithProperties");
 
     // Create program and kernel
     const size_t srcLen = std::strlen(kernelSrc);
@@ -97,7 +99,7 @@ int main() {
     // Validate
     bool ok = true;
     for (size_t i = 0; i < N; ++i)
-        if (outPtr[i] != 142 + i) ok = false;
+        if (outPtr[i] != static_cast<int>(142 + i)) ok = false;
 
     std::cout << (ok ? "✅ GPU saw host writes (zero-copy confirmed)\n"
                      : "❌ GPU did not see host writes (copying or staging occurred)\n");