fix compilation errors

src/ngraph/runtime/cpu/cpu_external_function.cpp

@@ -70,6 +70,7 @@
 #include "ngraph/op/erf.hpp"
 #include "ngraph/op/exp.hpp"
 #include "ngraph/op/experimental/batch_mat_mul.hpp"
+#include "ngraph/op/experimental/compiled_kernel.hpp"
 #include "ngraph/op/experimental/generate_mask.hpp"
 #include "ngraph/op/experimental/quantized_avg_pool.hpp"
 #include "ngraph/op/experimental/quantized_concat.hpp"
@@ -1210,10 +1211,14 @@ void runtime::cpu::CPU_ExternalFunction::register_common_passes(
 #if defined(NGRAPH_HALIDE)
     REGISTER_KNOBBED_PASS(HalideSubgraphExtraction, true, ngraph::runtime::cpu::pass);
 #endif
+
+#ifdef NGRAPH_MLIR_ENABLE
     if (std::getenv("NGRAPH_MLIR") != nullptr)
     {
         REGISTER_KNOBBED_PASS(MLIRSubgraphExtractionPass, /*enable by default*/ true, ngraph::pass);
     }
+#endif
+
     NodeVector nv_cwi; // We dont need CPUWorkspaceInsertion to return list of indices
     REGISTER_KNOBBED_PASS_WITH_ARGS(CPUWorkspaceInsertion, true, runtime::cpu::pass, nv_cwi, false);
     REGISTER_KNOBBED_PASS_WITH_ARGS(CPUAssignment, true, runtime::cpu::pass, this);