On Wednesday 2017-04-26 17:57, Michael Matz wrote:

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From there it follows fairly easily that /usr/lib should be empty on a pure lib64 system. Also /usr/lib should be able to be mounted noexec, and

So where would you move /usr/lib/perl5 then? I has it's own architecture specific subdirectories. And where to put plugins in general? They ought to be in subdirectories of lib to not interfere with the dynamic linker.

As I said, modules (i.e. DSOs that are used with dlopen, not loaded by ld.so) would be placed into (subdirs of) libexec (conceptually (to me) they are more similar to helper executables than shared libraries; they just happen to be implemented via shared library mechanisms)

/usr/lib/perl5 is one of the big blobs with its own way of doing things. Many (but not all) of the files therein are not arch dependend or binary, and hence would actually have a better place under /usr/share. The binary files that are there are not shared libraries for the dynamic loader but dlopen modules, so that would speak for libexec.

It's not that easy. perl also exists as a dynamic loader library (libperl.so) that could exist in multiple bitnesses, which means all the Perl modules (well,mthe XS things) cannot be libexec aka single bitness.

Same for Python..