Hi! I've been told several years ago that LD_PRELOAD is required to override a default malloc in dynamic executables. Recently I'm fighting with various crashes due to bad linking of jemalloc. The current solution I used is to use static version of jemalloc and only link libjemalloc.a to the final executable. This works well, however, I still don't have a clear mind of how others don't work. https://www.gnu.org/software/libc/manual/html_node/Replacing-malloc.html also mentions some failures when linking inappropriately, but without a real example. I think a minimal broken example would help developers understanding how to avoid common link failures, and catch potential bugs if any.