Workaround for Ubuntu broken LLVM package (llvm-3.5-dev does not have correct cmake files)

CMakeLists.txt

@@ -5,9 +5,19 @@ project(evmjit)
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
 # LLVM
-find_package(LLVM REQUIRED CONFIG)
-message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
-message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
+if(LLVM_DIR)	# local LLVM build
+	find_package(LLVM REQUIRED CONFIG)
+	message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
+	message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
+	# TODO: bitwriter is needed only for evmcc
+	llvm_map_components_to_libnames(LLVM_LIBS core support mcjit x86asmparser x86codegen bitwriter)
+else()
+	# Workaround for Ubuntu broken LLVM package
+	message(STATUS "Using llvm-3.5-dev package from Ubuntu. If does not work, build LLVM and set -DLLVM_DIR=llvm-build/share/llvm/cmake")
+	execute_process(COMMAND llvm-config-3.5 --includedir OUTPUT_VARIABLE LLVM_INCLUDE_DIRS)
+	message(STATUS "LLVM include dirs: ${LLVM_INCLUDE_DIRS}")
+	set(LLVM_LIBS "-lLLVMBitWriter -lLLVMX86CodeGen -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMCodeGen -lLLVMScalarOpts -lLLVMInstCombine -lLLVMTransformUtils -lLLVMipa -lLLVMAnalysis -lLLVMX86AsmParser -lLLVMX86Desc -lLLVMX86Info -lLLVMX86AsmPrinter -lLLVMX86Utils -lLLVMMCJIT -lLLVMTarget -lLLVMRuntimeDyld -lLLVMObject -lLLVMMCParser -lLLVMBitReader -lLLVMExecutionEngine -lLLVMMC -lLLVMCore -lLLVMSupport -lz -lpthread -lffi -ltinfo -ldl -lm")
+endif()
 
 # Boost
 find_package(Boost REQUIRED)

evmcc/CMakeLists.txt

@@ -14,7 +14,5 @@ include_directories(${Boost_INCLUDE_DIRS})
 
 target_link_libraries(${TARGET_NAME} ethereum)
 target_link_libraries(${TARGET_NAME} ${Boost_PROGRAM_OPTIONS_LIBRARIES})
-llvm_map_components_to_libnames(LLVM_LIBS bitwriter)
-target_link_libraries(${TARGET_NAME} ${LLVM_LIBS})
 
 install(TARGETS ${TARGET_NAME} DESTINATION bin )

libevmjit/CMakeLists.txt

@@ -15,9 +15,7 @@ set_property(TARGET ${TARGET_NAME} PROPERTY FOLDER "libs")
 
 include_directories(${LLVM_INCLUDE_DIRS})
 include_directories(${Boost_INCLUDE_DIRS})
-add_definitions(${LLVM_DEFINITIONS})
 
-llvm_map_components_to_libnames(LLVM_LIBS core support mcjit x86asmparser x86codegen)
 target_link_libraries(${TARGET_NAME} ${LLVM_LIBS})
 
 #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")