Revert "[MLIR][Python] add Python wheel build demo/test"

[makslevental]

Reverts #160388 because it broke mlir-nvidia builder.

[llvmbot]

@llvm/pr-subscribers-mlir

Author: Maksim Levental (makslevental)

Changes

Reverts llvm/llvm-project#160388

---

Full diff: https://github.com/llvm/llvm-project/pull/160481.diff

5 Files Affected:

• (modified) mlir/examples/standalone/CMakeLists.txt (+2-6)
• (removed) mlir/examples/standalone/pyproject.toml (-65)
• (modified) mlir/test/Examples/standalone/lit.local.cfg (-5)
• (removed) mlir/test/Examples/standalone/test.wheel.toy (-31)
• (modified) mlir/test/lit.site.cfg.py.in (-2)

diff --git a/mlir/examples/standalone/CMakeLists.txt b/mlir/examples/standalone/CMakeLists.txt
index c6c49fde12d2e..e2bcda7fa6f0b 100644
--- a/mlir/examples/standalone/CMakeLists.txt
+++ b/mlir/examples/standalone/CMakeLists.txt
@@ -63,12 +63,8 @@ if(MLIR_ENABLE_BINDINGS_PYTHON)
   include(MLIRDetectPythonEnv)
   mlir_configure_python_dev_packages()
   # Note: for EXTERNAL_PROJECT_BUILD this must be set from the command line.
-  if(NOT MLIR_PYTHON_PACKAGE_PREFIX)
-    set(MLIR_PYTHON_PACKAGE_PREFIX "mlir_standalone" CACHE STRING "" FORCE)
-  endif()
-  if(NOT MLIR_BINDINGS_PYTHON_INSTALL_PREFIX)
-    set(MLIR_BINDINGS_PYTHON_INSTALL_PREFIX "python_packages/standalone/${MLIR_PYTHON_PACKAGE_PREFIX}" CACHE STRING "" FORCE)
-  endif()
+  set(MLIR_PYTHON_PACKAGE_PREFIX "mlir_standalone" CACHE STRING "" FORCE)
+  set(MLIR_BINDINGS_PYTHON_INSTALL_PREFIX "python_packages/standalone/${MLIR_PYTHON_PACKAGE_PREFIX}" CACHE STRING "" FORCE)
   add_subdirectory(python)
 endif()
 add_subdirectory(test)
diff --git a/mlir/examples/standalone/pyproject.toml b/mlir/examples/standalone/pyproject.toml
deleted file mode 100644
index 5a1e6e86513c3..0000000000000
--- a/mlir/examples/standalone/pyproject.toml
+++ /dev/null
@@ -1,65 +0,0 @@
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-# Copyright (c) 2025.
-
-[project]
-name = "standalone-python-bindings"
-dynamic = ["version"]
-requires-python = ">=3.8,<=3.14"
-dependencies = [
-    "numpy>=1.19.5, <=2.1.2",
-    "PyYAML>=5.4.0, <=6.0.1",
-    "ml_dtypes>=0.1.0, <=0.6.0; python_version<'3.13'",
-    "ml_dtypes>=0.5.0, <=0.6.0; python_version>='3.13'",
-]
-
-[project.urls]
-Homepage = "https://github.com/llvm/llvm-project"
-Discussions = "https://discourse.llvm.org/"
-"Issue Tracker" = "https://github.com/llvm/llvm-project/issues?q=is%3Aissue%20state%3Aopen%20label%3Amlir%3Apython%20"
-"Source Code" = "https://github.com/llvm/llvm-project/tree/main/mlir/python"
-
-[build-system]
-requires = [
-    "scikit-build-core>=0.10.7",
-    "typing_extensions>=4.12.2",
-    "nanobind>=2.9, <3.0",
-    "pybind11>=2.10.0, <=2.13.6",
-]
-build-backend = "scikit_build_core.build"
-
-[tool.scikit-build]
-# This is the minimum version of scikit-build-core.
-minimum-version = "0.10.7"
-# This pyproject.toml must be adjacent to the root CMakeLists.txt (wherever project(...) is specified).
-cmake.source-dir = "."
-# This is for installing/distributing the python bindings target and only the python bindings target.
-build.targets = ["StandalonePythonModules"]
-install.components = ["StandalonePythonModules"]
-
-[tool.scikit-build.cmake.define]
-# Optional
-CMAKE_C_COMPILER = { env = "CMAKE_C_COMPILER", default = "" }
-CMAKE_CXX_COMPILER = { env = "CMAKE_CXX_COMPILER", default = "" }
-CMAKE_C_COMPILER_LAUNCHER = { env = "CMAKE_C_COMPILER_LAUNCHER", default = "" }
-CMAKE_CXX_COMPILER_LAUNCHER = { env = "CMAKE_CXX_COMPILER_LAUNCHER", default = "" }
-CMAKE_GENERATOR = { env = "CMAKE_GENERATOR", default = "Ninja" }
-LLVM_USE_LINKER = { env = "LLVM_USE_LINKER", default = "" }
-# Optional but highly recommended (this makes the bindings compatible with other bindings packages
-# by preventing symbol collisions).
-CMAKE_VISIBILITY_INLINES_HIDDEN = "ON"
-CMAKE_C_VISIBILITY_PRESET = "hidden"
-CMAKE_CXX_VISIBILITY_PRESET = "hidden"
-
-# Non-optional (alternatively you could use CMAKE_PREFIX_PATH here).
-MLIR_DIR = { env = "MLIR_DIR", default = "" }
-# Non-optional
-CMAKE_BUILD_TYPE = { env = "CMAKE_BUILD_TYPE", default = "Release" }
-MLIR_ENABLE_BINDINGS_PYTHON = "ON"
-# Effectively non-optional (any downstream project should specify this).
-MLIR_PYTHON_PACKAGE_PREFIX = "mlir_standalone"
-# This specifies the directory in the install directory (i.e., /tmp/pip-wheel/platlib) where _mlir_libs, dialects, etc.
-# are installed. Thus, this will be the package location (and the name of the package) that pip assumes is
-# the root package.
-MLIR_BINDINGS_PYTHON_INSTALL_PREFIX = "mlir_standalone"
diff --git a/mlir/test/Examples/standalone/lit.local.cfg b/mlir/test/Examples/standalone/lit.local.cfg
index a566208b47bc1..3b12dcbd99e83 100644
--- a/mlir/test/Examples/standalone/lit.local.cfg
+++ b/mlir/test/Examples/standalone/lit.local.cfg
@@ -1,5 +1,3 @@
-import os
-
 # Disable with sanitizers for now, this require some more setup apparently.
 for san in ["asan", "msan", "ubsan"]:
     if san in config.available_features:
@@ -9,10 +7,7 @@ config.substitutions.append(("%cmake_exe", config.host_cmake))
 config.substitutions.append(("%cmake_generator", config.host_cmake_generator))
 config.substitutions.append(("%host_cxx", config.host_cxx))
 config.substitutions.append(("%host_cc", config.host_cc))
-config.substitutions.append(("%hostc_compiler_launcher", config.host_c_compiler_launcher))
-config.substitutions.append(("%hostcxx_compiler_launcher", config.host_cxx_compiler_launcher))
 config.substitutions.append(("%enable_libcxx", config.enable_libcxx))
 config.substitutions.append(("%mlir_cmake_dir", config.mlir_cmake_dir))
-config.substitutions.append(("%mlir_obj_root", config.mlir_obj_root))
 config.substitutions.append(("%llvm_use_linker", config.llvm_use_linker))
 config.substitutions.append(("%cmake_build_type", config.cmake_build_type))
diff --git a/mlir/test/Examples/standalone/test.wheel.toy b/mlir/test/Examples/standalone/test.wheel.toy
deleted file mode 100644
index 1a439d5689939..0000000000000
--- a/mlir/test/Examples/standalone/test.wheel.toy
+++ /dev/null
@@ -1,31 +0,0 @@
-# There's no real issue with windows here, it's just that some CMake generated paths for targets end up being longer
-# than 255 chars when combined with the fact that pip wants to install into a tmp directory buried under
-# C/Users/ContainerAdministrator/AppData/Local/Temp.
-# UNSUPPORTED: target={{.*(windows).*}}
-
-# RUN: export CMAKE_BUILD_TYPE=%cmake_build_type
-# RUN: export CMAKE_CXX_COMPILER=%host_cxx
-# RUN: export CMAKE_CXX_COMPILER_LAUNCHER=%hostcxx_compiler_launcher
-# RUN: export CMAKE_C_COMPILER=%host_cc
-# RUN: export CMAKE_C_COMPILER_LAUNCHER=%hostc_compiler_launcher
-# RUN: export CMAKE_GENERATOR=%cmake_generator
-# RUN: export LLVM_USE_LINKER=%llvm_use_linker
-# RUN: export MLIR_DIR="%mlir_cmake_dir"
-
-# RUN: %python -m pip wheel "%mlir_src_root/examples/standalone" -w "%mlir_obj_root/wheelhouse" -v | tee %t
-
-# RUN: rm -rf "%mlir_obj_root/standalone-python-bindings-install"
-# RUN: %python -m pip install standalone_python_bindings -f "%mlir_obj_root/wheelhouse" --target "%mlir_obj_root/standalone-python-bindings-install" -v | tee -a %t
-
-# RUN: export PYTHONPATH="%mlir_obj_root/standalone-python-bindings-install"
-# RUN: %python "%mlir_src_root/examples/standalone/test/python/smoketest.py" nanobind | tee -a %t
-
-# RUN: FileCheck --input-file=%t %s
-
-# CHECK: Successfully built standalone-python-bindings
-
-# CHECK: module {
-# CHECK:   %[[C2:.*]] = arith.constant 2 : i32
-# CHECK:   %[[V0:.*]] = standalone.foo %[[C2]] : i32
-# CHECK: }
-
diff --git a/mlir/test/lit.site.cfg.py.in b/mlir/test/lit.site.cfg.py.in
index 940e2ad3c4365..2fc595dfabbf5 100644
--- a/mlir/test/lit.site.cfg.py.in
+++ b/mlir/test/lit.site.cfg.py.in
@@ -15,8 +15,6 @@ config.native_target = "@LLVM_NATIVE_ARCH@"
 config.host_os = "@HOST_OS@"
 config.host_cc = "@HOST_CC@"
 config.host_cxx = "@HOST_CXX@"
-config.host_c_compiler_launcher = "@CMAKE_C_COMPILER_LAUNCHER@"
-config.host_cxx_compiler_launcher = "@CMAKE_CXX_COMPILER_LAUNCHER@"
 config.enable_libcxx = "@LLVM_ENABLE_LIBCXX@"
 config.host_cmake = "@CMAKE_COMMAND@"
 config.host_cmake_generator = "@CMAKE_GENERATOR@"