Revert "Reenable LTC in out-of-tree build (#1177)" (#1183)

This reverts commit f85ae9c.

.github/workflows/buildAndTest.yml

@@ -87,6 +87,7 @@ jobs:
           externals/llvm-project/llvm
         cmake --build llvm-build
 
+        # TODO: Reenable LTC once OOT build is successful (https://github.com/llvm/torch-mlir/issues/1154)
         cmake -GNinja -Bbuild \
           -DCMAKE_LINKER=lld \
           -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
@@ -96,6 +97,7 @@ jobs:
           -DMLIR_ENABLE_BINDINGS_PYTHON=OFF \
           -DTORCH_MLIR_ENABLE_MHLO=ON \
           -DTORCH_MLIR_USE_INSTALLED_PYTORCH=${{ matrix.torch-binary }} \
+          -DTORCH_MLIR_ENABLE_LTC=OFF \
           -DPython3_EXECUTABLE=$(which python) \
           .
 

python/torch_mlir/dialects/torch/importer/jit_ir/csrc/CMakeLists.txt

@@ -10,7 +10,15 @@ include_directories(BEFORE
   )
 link_directories("${TORCH_INSTALL_PREFIX}/lib")
 
-add_library(TorchMLIRJITIRImporter SHARED
+# TODO: Currently, out-of-tree build fails when LIBRARY_TYPE is set to SHARED, so we have this toggle.
+#       See https://github.com/llvm/torch-mlir/issues/1154 for more details.
+if(TORCH_MLIR_ENABLE_LTC)
+  set(LIBRARY_TYPE "SHARED")
+else()
+  set(LIBRARY_TYPE "MODULE")
+endif()
+
+add_library(TorchMLIRJITIRImporter ${LIBRARY_TYPE}
   class_annotator.cpp
   class_annotator_pybind.cpp
   get_registered_ops.cpp

setup.py

@@ -76,6 +76,8 @@ def run(self):
                 f"-DMLIR_ENABLE_BINDINGS_PYTHON=ON",
                 f"-DLLVM_ENABLE_PROJECTS=mlir",
                 f"-DTORCH_MLIR_ENABLE_MHLO=ON",
+                # TODO: Reenable LTC once JIT importer linkage issue is fixed (https://github.com/llvm/torch-mlir/issues/1154)
+                f"-DTORCH_MLIR_ENABLE_LTC=OFF",
                 f"-DLLVM_EXTERNAL_PROJECTS=torch-mlir;torch-mlir-dialects",
                 f"-DLLVM_EXTERNAL_TORCH_MLIR_SOURCE_DIR={src_dir}",
                 f"-DLLVM_EXTERNAL_TORCH_MLIR_DIALECTS_SOURCE_DIR={src_dir}/externals/llvm-external-projects/torch-mlir-dialects",