Re: [PATCH 00/14] Move libdl into libc

[Florian Weimer <fweimer@redhat.com>]

* Florian Weimer via Libc-alpha:

> This patch series removes all code from libdl.so.2.  I have not removed
> the shared object itself because I want to mirror what we are doing for
> libpthread, and the discussion there is still ongoing.
>
> There is an oddity because for several targets, the baseline ABI version
> for libdl is GLIBC_2.0 and not GLIBC_2.2.  This cannot be expressed with
> the existing Versions framework.  Since the affected targets are more or
> less on the way out anyway (hppa, ia64, sh, sparc64), I didn't
> overdesign the solution and emitted the required version nodes directly
> in scripts/versions.awk.
>
> This move also happens on Hurd because the implementation isn't
> separate.
>
> This fixes a POSIX conformance issue with the c99 command because POSIX
> requires that dlopen etc. are available without -ldl.
>
> Tested on i386-linux-gnu and x86_64-linux-gnu.  Built with
> build-many-glibcs.py (including most intermediate steps).

I should have mentioned that I'm removing the strange double-build with
those dlfcn/sdl*.c files.  This is why the files have somewhat different
layout after the move.  I do not see any value in the dlfcn/sdl*.c
construct.  The new version relies on compiler inlining to remove
redudant functions.

Thanks,
Florian