Add FFI wrapper crate

ffi/CMakeLists.txt

@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 2.8)
+project(ffi_tests CXX)
+
+include_directories("${CMAKE_SOURCE_DIR}/include")
+
+set(CMAKE_CXX_STANDARD 11)
+
+if (CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    set (SYSTEM_LIBS pthread dl)
+endif ()
+
+if (MSVC)
+    set (SYSTEM_LIBS ws2_32 Userenv)
+endif ()
+
+set (FFI_LIBRARY "${CMAKE_SOURCE_DIR}/../target/debug/${CMAKE_STATIC_LIBRARY_PREFIX}loot_condition_interpreter_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}")
+
+add_executable(ffi_cpp_tests "${CMAKE_SOURCE_DIR}/tests/ffi.cpp")
+target_link_libraries(ffi_cpp_tests ${FFI_LIBRARY} ${SYSTEM_LIBS})
+
+enable_testing()
+add_test(ffi_cpp_tests ffi_cpp_tests)