[Mlir-commits] [mlir] Added free-threading CPython mode support in MLIR Python bindings (PR #107103)

[Scott Todd]

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@@ -668,12 +668,31 @@ function(add_mlir_python_extension libname extname)
   elseif(ARG_PYTHON_BINDINGS_LIBRARY STREQUAL "nanobind")
     nanobind_add_module(${libname}
       NB_DOMAIN mlir
+      FREE_THREADED
       ${ARG_SOURCES}
     )
 
     if (LLVM_COMPILER_IS_GCC_COMPATIBLE OR CLANG_CL)
       # Avoids warnings from upstream nanobind.
-      target_compile_options(nanobind-static
+      set(nanobind_target "nanobind-static")
+      if (NOT TARGET ${nanobind_target})
+        # Get correct nanobind target name: nanobind-static-ft or something else
+        # It is set by nanobind_add_module function according to the passed options
+        get_property(all_targets DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY BUILDSYSTEM_TARGETS)
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ScottTodd wrote:

My downstream project is also setting `MLIR_DISABLE_CONFIGURE_PYTHON_DEV_PACKAGES` to take control over the Python dependency setup. Another solution is to only modify the target options if `MLIR_DISABLE_CONFIGURE_PYTHON_DEV_PACKAGES` is not set.

https://github.com/llvm/llvm-project/pull/107103