Index: qcdloop-2.0.9/CMakeLists.txt
===================================================================
--- qcdloop-2.0.9.orig/CMakeLists.txt
+++ qcdloop-2.0.9/CMakeLists.txt
@@ -86,7 +86,7 @@ add_library(qcdloop SHARED src/box.cc
                          ${Headers}
 )
 
-target_link_libraries(qcdloop)
+target_link_libraries(qcdloop quadmath)
 install(FILES ${CMAKE_BINARY_DIR}/src/qcdloop-config
   DESTINATION bin PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ
   GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)