improve linking to MLIR (#35)

This change moves the configuration of the MLIR dependencies into the MLIR source directory, and reduces the number of MLIR dependencies to include only the necessary libraries.

nautilus/src/nautilus/compiler/backends/CompilationBackend.cpp

@@ -1,9 +1,17 @@
 #include "nautilus/compiler/backends/CompilationBackend.hpp"
+#include "nautilus/config.hpp"
+#ifdef ENABLE_ASMJIT_BACKEND
 #include "nautilus/compiler/backends/amsjit/AsmJitCompilationBackend.hpp"
+#endif
+#ifdef ENABLE_BC_BACKEND
 #include "nautilus/compiler/backends/bc/BCInterpreterBackend.hpp"
+#endif
+#ifdef ENABLE_C_BACKEND
 #include "nautilus/compiler/backends/cpp/CPPCompilationBackend.hpp"
+#endif
+#ifdef ENABLE_MLIR_BACKEND
 #include "nautilus/compiler/backends/mlir/MLIRCompilationBackend.hpp"
-#include "nautilus/config.hpp"
+#endif
 #include "nautilus/exceptions/RuntimeException.hpp"
 
 namespace nautilus::compiler {

nautilus/src/nautilus/compiler/backends/mlir/CMakeLists.txt

@@ -1,7 +1,29 @@
 
 if (ENABLE_MLIR_BACKEND)
-
-    include(${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../cmake/AddMLIR.cmake)
+    find_package(MLIR REQUIRED CONFIG)
+    message(STATUS MLIR_INCLUDE_DIRS=${MLIR_INCLUDE_DIRS})
+    target_include_directories(nautilus SYSTEM PRIVATE
+            $<BUILD_INTERFACE:${MLIR_INCLUDE_DIRS}>
+            $<INSTALL_INTERFACE:include/nebulastream/>)
+    add_compile_definitions(MLIR_COMPILER)
+    get_property(mlir_libs GLOBAL PROPERTY MLIR_ALL_LIBS)
+    get_property(dialect_libs GLOBAL PROPERTY MLIR_DIALECT_LIBS)
+    get_property(conversion_libs GLOBAL PROPERTY MLIR_CONVERSION_LIBS)
+    get_property(extension_libs GLOBAL PROPERTY MLIR_EXTENSION_LIBS)
+    message(STATUS "Using MLIRConfig.cmake in: ${MLIR_DIR}")
+    message(STATUS "mlir_libs: ${mlir_libs}")
+    message(STATUS "dialect_libs: ${dialect_libs}")
+    message(STATUS "conversion_libs: ${conversion_libs}")
+    message(STATUS "extension_libs: ${extension_libs}")
+    target_link_libraries(nautilus
+            PRIVATE
+            MLIRExecutionEngine
+            MLIRFuncAllExtensions
+            # Dialects
+            MLIRSCFDialect
+            MLIRFuncToLLVM
+            MLIRSCFToControlFlow
+    )
 
     add_source_files(nautilus
             MLIRLoweringProvider.cpp