[MLU]fix compile and add cncl (#39394)

paddle/fluid/platform/device/mlu/device_context.cc

@@ -57,7 +57,7 @@ MLUDeviceContext::MLUDeviceContext(MLUPlace place) : place_(place) {
 
 MLUDeviceContext::~MLUDeviceContext() {}
 
-Place MLUDeviceContext::GetPlace() const { return place_; }
+const Place& MLUDeviceContext::GetPlace() const { return place_; }
 
 void MLUDeviceContext::Wait() const { context()->Stream()->Wait(); }
 

paddle/fluid/platform/device/mlu/device_context.h

@@ -78,7 +78,7 @@ class MLUDeviceContext : public DeviceContext {
   explicit MLUDeviceContext(MLUPlace place);
   virtual ~MLUDeviceContext();
   Eigen::DefaultDevice* eigen_device() const { return nullptr; }
-  Place GetPlace() const override;
+  const Place& GetPlace() const override;
 
   int GetComputeCapability() const;
 

paddle/scripts/paddle_build.sh

@@ -226,6 +226,7 @@ function cmake_base() {
         -DWITH_PSLIB=${WITH_PSLIB:-OFF}
         -DWITH_GLOO=${gloo_flag}
         -DWITH_LITE=${WITH_LITE:-OFF}
+        -DWITH_CNCL=${WITH_CNCL:-OFF}
         -DWITH_XPU=${WITH_XPU:-OFF}
         -DWITH_MLU=${WITH_MLU:-OFF}
         -DLITE_GIT_TAG=release/v2.10
@@ -277,6 +278,7 @@ EOF
         -DLITE_GIT_TAG=release/v2.10 \
         -DWITH_XPU=${WITH_XPU:-OFF} \
         -DWITH_MLU=${WITH_MLU:-OFF} \
+        -DWITH_CNCL=${WITH_CNCL:-OFF} \
         -DXPU_SDK_ROOT=${XPU_SDK_ROOT:-""} \
         -DWITH_LITE=${WITH_LITE:-OFF} \
         -DWITH_XPU_BKCL=${WITH_XPU_BKCL:-OFF} \