[MLIR] enable Standalone example test for Windows

[makslevental]

This PR turns on all Standalone tests for Windows except for the plugins (which aren't supported on Windows I believe).

[llvmbot]

@llvm/pr-subscribers-mlir

Author: Maksim Levental (makslevental)

Changes

This PR turns on all Standalone tests for Windows except for the plugins (which aren't supported on Windows I believe).

---

Full diff: https://github.com/llvm/llvm-project/pull/158183.diff

8 Files Affected:

• (modified) mlir/examples/standalone/CMakeLists.txt (+3-1)
• (modified) mlir/examples/standalone/python/CMakeLists.txt (+4)
• (modified) mlir/examples/standalone/test/CMakeLists.txt (+3-1)
• (modified) mlir/examples/standalone/test/Standalone/standalone-pass-plugin.mlir (+1)
• (modified) mlir/examples/standalone/test/Standalone/standalone-plugin.mlir (+1)
• (modified) mlir/test/Examples/standalone/lit.local.cfg (+4)
• (modified) mlir/test/Examples/standalone/test.toy (+5-1)
• (modified) mlir/test/lit.site.cfg.py.in (+4)

diff --git a/mlir/examples/standalone/CMakeLists.txt b/mlir/examples/standalone/CMakeLists.txt
index 88dfa3e5d57a3..03627c0c10496 100644
--- a/mlir/examples/standalone/CMakeLists.txt
+++ b/mlir/examples/standalone/CMakeLists.txt
@@ -60,5 +60,7 @@ if(MLIR_ENABLE_BINDINGS_PYTHON)
 endif()
 add_subdirectory(test)
 add_subdirectory(standalone-opt)
-add_subdirectory(standalone-plugin)
+if(NOT WIN32)
+  add_subdirectory(standalone-plugin)
+endif()
 add_subdirectory(standalone-translate)
diff --git a/mlir/examples/standalone/python/CMakeLists.txt b/mlir/examples/standalone/python/CMakeLists.txt
index a0eca9c095775..1ab27ce3b533a 100644
--- a/mlir/examples/standalone/python/CMakeLists.txt
+++ b/mlir/examples/standalone/python/CMakeLists.txt
@@ -26,6 +26,8 @@ declare_mlir_python_extension(StandalonePythonSources.Pybind11Extension
   ADD_TO_PARENT StandalonePythonSources
   SOURCES
     StandaloneExtensionPybind11.cpp
+  PRIVATE_LINK_LIBS
+    LLVMSupport
   EMBED_CAPI_LINK_LIBS
     StandaloneCAPI
   PYTHON_BINDINGS_LIBRARY pybind11
@@ -36,6 +38,8 @@ declare_mlir_python_extension(StandalonePythonSources.NanobindExtension
   ADD_TO_PARENT StandalonePythonSources
   SOURCES
     StandaloneExtensionNanobind.cpp
+  PRIVATE_LINK_LIBS
+    LLVMSupport
   EMBED_CAPI_LINK_LIBS
     StandaloneCAPI
   PYTHON_BINDINGS_LIBRARY nanobind
diff --git a/mlir/examples/standalone/test/CMakeLists.txt b/mlir/examples/standalone/test/CMakeLists.txt
index fdde159064287..8864563df8a33 100644
--- a/mlir/examples/standalone/test/CMakeLists.txt
+++ b/mlir/examples/standalone/test/CMakeLists.txt
@@ -14,8 +14,10 @@ set(STANDALONE_TEST_DEPENDS
         standalone-capi-test
         standalone-opt
         standalone-translate
-        StandalonePlugin
         )
+if(NOT WIN32)
+  list(APPEND STANDALONE_TEST_DEPENDS StandalonePlugin)
+endif()
 if(MLIR_ENABLE_BINDINGS_PYTHON)
   list(APPEND STANDALONE_TEST_DEPENDS StandalonePythonModules)
 endif()
diff --git a/mlir/examples/standalone/test/Standalone/standalone-pass-plugin.mlir b/mlir/examples/standalone/test/Standalone/standalone-pass-plugin.mlir
index 1d652dc45830c..3020097dc1640 100644
--- a/mlir/examples/standalone/test/Standalone/standalone-pass-plugin.mlir
+++ b/mlir/examples/standalone/test/Standalone/standalone-pass-plugin.mlir
@@ -1,3 +1,4 @@
+// UNSUPPORTED: system-windows
 // RUN: mlir-opt %s --load-pass-plugin=%standalone_libs/StandalonePlugin%shlibext --pass-pipeline="builtin.module(standalone-switch-bar-foo)" | FileCheck %s
 
 module {
diff --git a/mlir/examples/standalone/test/Standalone/standalone-plugin.mlir b/mlir/examples/standalone/test/Standalone/standalone-plugin.mlir
index 468932b81a529..900b524c1feb7 100644
--- a/mlir/examples/standalone/test/Standalone/standalone-plugin.mlir
+++ b/mlir/examples/standalone/test/Standalone/standalone-plugin.mlir
@@ -1,3 +1,4 @@
+// UNSUPPORTED: system-windows
 // RUN: mlir-opt %s --load-dialect-plugin=%standalone_libs/StandalonePlugin%shlibext --pass-pipeline="builtin.module(standalone-switch-bar-foo)" | FileCheck %s
 
 module {
diff --git a/mlir/test/Examples/standalone/lit.local.cfg b/mlir/test/Examples/standalone/lit.local.cfg
index fe8397c6b9a10..ef4e743a3add8 100644
--- a/mlir/test/Examples/standalone/lit.local.cfg
+++ b/mlir/test/Examples/standalone/lit.local.cfg
@@ -10,3 +10,7 @@ config.substitutions.append(("%host_cc", config.host_cc))
 config.substitutions.append(("%enable_libcxx", config.enable_libcxx))
 config.substitutions.append(("%mlir_cmake_dir", config.mlir_cmake_dir))
 config.substitutions.append(("%llvm_use_linker", config.llvm_use_linker))
+config.substitutions.append(("%cmke_exe_linker_flags", config.cmake_exe_linker_flags))
+config.substitutions.append(("%cmake_module_linker_flags", config.cmake_module_linker_flags))
+config.substitutions.append(("%cmake_shared_linker_flags", config.cmake_shared_linker_flags))
+config.substitutions.append(("%cmake_build_type", config.cmake_build_type))
diff --git a/mlir/test/Examples/standalone/test.toy b/mlir/test/Examples/standalone/test.toy
index e99bab5f0affc..527c82fa85350 100644
--- a/mlir/test/Examples/standalone/test.toy
+++ b/mlir/test/Examples/standalone/test.toy
@@ -1,7 +1,11 @@
 # RUN: "%cmake_exe" "%mlir_src_root/examples/standalone" -G "%cmake_generator" \
+# RUN: -DCMAKE_BUILD_TYPE=%cmake_build_type \
 # 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: -DCMAKE_EXE_LINKER_FLAGS="%cmke_exe_linker_flags" \
+# RUN: -DCMAKE_MODULE_LINKER_FLAGS="%cmake_module_linker_flags" \
+# RUN: -DCMAKE_SHARED_LINKER_FLAGS="%cmake_shared_linker_flags" \
 # RUN: -DPython3_EXECUTABLE=%python \
 # RUN: -DPython_EXECUTABLE=%python
 # RUN: "%cmake_exe" --build . --target check-standalone | tee %t
@@ -11,4 +15,4 @@
 # if any fail.
 # CHECK: Passed
 # CHECK-NOT: Failed
-# UNSUPPORTED: target={{.*(windows|android).*}}
+# UNSUPPORTED: target={{.*(android).*}}
diff --git a/mlir/test/lit.site.cfg.py.in b/mlir/test/lit.site.cfg.py.in
index 8a742a227847b..c564a51128739 100644
--- a/mlir/test/lit.site.cfg.py.in
+++ b/mlir/test/lit.site.cfg.py.in
@@ -18,6 +18,10 @@ config.host_cxx = "@HOST_CXX@"
 config.enable_libcxx = "@LLVM_ENABLE_LIBCXX@"
 config.host_cmake = "@CMAKE_COMMAND@"
 config.host_cmake_generator = "@CMAKE_GENERATOR@"
+config.cmake_build_type = "@CMAKE_BUILD_TYPE@"
+config.cmake_exe_linker_flags = "@CMAKE_EXE_LINKER_FLAGS@"
+config.cmake_module_linker_flags = "@CMAKE_MODULE_LINKER_FLAGS@"
+config.cmake_shared_linker_flags = "@CMAKE_SHARED_LINKER_FLAGS@"
 config.llvm_use_linker = "@LLVM_USE_LINKER@"
 config.llvm_use_sanitizer = "@LLVM_USE_SANITIZER@"
 config.host_arch = "@HOST_ARCH@"

[christopherbate]

LGTM although I don't have an easy way to test the changes locally.

BTW what is the plugin limitation on windows? I couldn't find any mention of this in the codebase.

[makslevental]

BTW what is the plugin limitation on windows? I couldn't find any mention of this in the codebase.

I'm struggling to remember but I went back to one of the original PRs and found this link that suggest it should work. The thing is I did have it on in the first push and there was a fail that I can't find in the CI (here) now. Let me switch it back on and see what happens.

[makslevental]

2025-09-12T17:47:03.2044126Z # | -- StandalonePlugin ignored -- Loadable modules not supported on this platform.

You can trace it back to

llvm-project/llvm/CMakeLists.txt

Lines 1050 to 1059 in 54c304c

	if(WIN32 OR CYGWIN)
	if(BUILD_SHARED_LIBS OR LLVM_BUILD_LLVM_DYLIB)
	set(LLVM_ENABLE_PLUGINS_default ON)
	else()
	set(LLVM_ENABLE_PLUGINS_default OFF)
	endif()
	else()
	set(LLVM_ENABLE_PLUGINS_default ${LLVM_ENABLE_PIC})
	endif()
	option(LLVM_ENABLE_PLUGINS "Enable plugin support" ${LLVM_ENABLE_PLUGINS_default})

So maybe it can be made to work by adding one of those prereqs but I'd rather not mess with it here.