moved 32-bit/64-bit detection into main CMakeLists

db_drivers/CMakeLists.txt

@@ -28,14 +28,8 @@
 
 # We aren't even going to check the system for an installed LMDB driver, as it is too
 # critical a consensus component to rely on dynamically linked libraries
-if(CMAKE_SIZEOF_VOID_P EQUAL "8")
-  message(STATUS "Using 64-bit LMDB from source tree")
-  add_subdirectory(liblmdb)
-  set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb" PARENT_SCOPE)
-else()
-  message(STATUS "Using 32-bit LMDB from source tree")
-  add_subdirectory(liblmdb-vl32)
-  set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb-vl32" PARENT_SCOPE)
-endif()
+message(STATUS "Using ${ARCH_WIDTH}-bit LMDB from source tree")
+add_subdirectory(liblmdb${ARCH_WIDTH})
+set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb${ARCH_WIDTH}" PARENT_SCOPE)
 
 set(LMDB_LIBRARY "lmdb" PARENT_SCOPE)