fix standalone

Author: makslevental

mlir/examples/standalone/CMakeLists.txt

@@ -52,6 +52,8 @@ add_subdirectory(include)
 add_subdirectory(lib)
 if(MLIR_ENABLE_BINDINGS_PYTHON)
   message(STATUS "Enabling Python API")
+  include(MLIRDetectPythonEnv)
+  mlir_configure_python_dev_packages()
   set(MLIR_PYTHON_PACKAGE_PREFIX "mlir_standalone" CACHE STRING "" FORCE)
   set(MLIR_BINDINGS_PYTHON_INSTALL_PREFIX "python_packages/standalone/mlir_standalone" CACHE STRING "" FORCE)
   add_subdirectory(python)

mlir/test/Examples/standalone/test.toy

@@ -2,7 +2,8 @@
 # RUN: -DCMAKE_CXX_COMPILER=%host_cxx -DCMAKE_C_COMPILER=%host_cc \
 # RUN: -DLLVM_ENABLE_LIBCXX=%enable_libcxx -DMLIR_DIR=%mlir_cmake_dir \
 # RUN: -DLLVM_USE_LINKER=%llvm_use_linker \
-# RUN: -DPython3_EXECUTABLE=%python
+# RUN: -DPython3_EXECUTABLE=%python \
+# RUN: -DPython_EXECUTABLE=%python
 # RUN: "%cmake_exe" --build . --target check-standalone | tee %t | FileCheck %s
 
 # Note: The number of checked tests is not important. The command will fail