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Always mark jemalloc needed if jemalloc is enabled by akihikodaki · Pull Request #4627 · ruby/ruby
https://github.com/ruby/ruby/pull/4627
> Symbols exported by jemalloc is referred by the shared library but not
> by the executables when building Ruby as a shared library with
> jemalloc. It causes shared libraries such as the GNU C++ library
> occasionally rely on the memory allocator provided by the standard C
> library. Worse, the resolved symbols can later be replaced with
> jemalloc, and jemalloc may see pointers from the standard C library,
> which results in various failures.
> e.g. https://github.com/tootsuite/mastodon/issues/15751
As a workaround, do not rely on jemalloc enablement of Ruby, and
preload libjemalloc.so instead.
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