Merge remote-tracking branch 'upstream/develop' into evmjit-develop

Conflicts:
	evmjit/CMakeLists.txt
	evmjit/libevmjit/Arith256.cpp

CMakeLists.txt

@@ -10,13 +10,13 @@ else()
 	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wextra -Wconversion -Wno-sign-conversion -Wno-unknown-pragmas ${CMAKE_CXX_FLAGS}")
 endif()
 
-if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux" AND NOT ${CMAKE_BUILD_TYPE} STREQUAL "DebugSan")
 	# Do not allow unresovled symbols in shared library (default on linux)
 	set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined")
 endif()
 
 # LLVM
-find_package(LLVM REQUIRED CONFIG)
+find_package(LLVM 3.7 REQUIRED CONFIG)
 message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
 message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
 add_definitions(${LLVM_DEFINITIONS})