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Date: Thu, 20 Jul 2000 23:22:18 -0700 From: "H . J . Lu" <hjl@lucon.org> On Thu, Jul 20, 2000 at 11:21:12PM -0700, Geoff Keating wrote: > > Date: Thu, 20 Jul 2000 21:14:54 -0700 > > From: "H . J . Lu" <hjl@lucon.org> > > > On Thu, Jul 20, 2000 at 08:27:31PM -0700, Geoff Keating wrote: > > > I know I _can_ use it, but when do I _have_ to use it? What would go > > > wrong if the linker never emitted any of these tags? > > > The reason I added the support is Ulrich wanted DF_1_NODELETE for > > libpthread.so. > ... > > So shouldn't we only use the new tags if the user specifies -z > nodelete (or whatever it is)? Yes, that is how it works. The new dtags will be generated only by either -z xxxxx or --enable-new-dtags. Q: But why do you need --enable-new-dtags at all? A: Because HJ sneaked in some patches that do more than just setting a flag such as DF_1_NODELETE as a response for the user specifying a -z nodelete. 2000-07-19 H.J. Lu <hjl@gnu.org> * elf32-arm.h (elf32_arm_size_dynamic_sections): Also set DF_TEXTREL if DT_TEXTREL is set. * bfd/elflink.h (NAME(bfd_elf,size_dynamic_sections)): Also set DF_SYMBOLIC for symbolic link. Also set DT_RUNPATH if DT_RPATH is set. Set the DT_FLAGS and DT_FLAGS_1 entries if necessary. Especially the DT_RUNPATH change is important. This means that where previously -rpath did only set DT_RPATH, it now also sets DT_RUNPATH. As I understand it DT_RUNPATH is supposed to replace DT_RPATH in the new ELF specs, but with slightly different semantics (at least on some platfroms). This makes me wonder whether setting both is really such an idea. I think that changes such as these deserve some deserve some more discussion on the binutils list before they are made. HJ, could you please try to cooperate a bit more and give other people who depend on the ELF linker a chance to comment on this kind of changes? Mark
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