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Re: stap libdwfl bug-compatibility requirements
- From: fche at redhat dot com (Frank Ch. Eigler)
- To: Roland McGrath <roland at redhat dot com>
- Cc: systemtap at sources dot redhat dot com, elfutils-devel at lists dot fedorahosted dot org
- Date: Wed, 17 Dec 2008 18:59:14 -0500
- Subject: Re: stap libdwfl bug-compatibility requirements
- References: <20081217025447.BC693FC3BC@magilla.sf.frob.com>
Roland McGrath <roland@redhat.com> writes:
> We are preparing to release version 0.138 of elfutils. I gather that
> systemtap might be expecting some buggy old behavior that we've fixed.
> [...]
> I don't propose to worry about preexisting systemtap sources being
> freshly rebuilt against elfutils-devel >= 0.138.
As discussed on IRC, I suggest we do worry about this case. One
possible solution is to give the bug-fixed variant a new name and
preserve the old one (perhaps only as hidden implementation exposed
via symbol versioning):
old/deprecated: dwfl_module_build_id
new/fixed: dwfl_module_build_id_bits
Systemtap does not use the other build-id-related functions, and this
may have been the only one affected by the bug.
- FChE