On Tue, Feb 9, 2010 at 3:38 PM, Adam Jackson <ajax@xxxxxxxxxx> wrote:
On Tue, 2010-02-09 at 08:06 +0000, Richard Hughes wrote:Just as a reminder, this change is --no-add-needed, not --no-as-needed.
> On 8 February 2010 22:46, Kevin Kofler <kevin.kofler@xxxxxxxxx> wrote:
> > As a result, you'll be causing dozens of FTBFS bugs just before the feature
> > freeze. I think this is entirely the wrong time in the release cycle to do
> > such a change, if it is done at all.
>
> I've been fixing upstream projects for weeks to build with
> --no-as-needed. The list of projects that fail to build should be much
> smaller now, especially for GNOME and Freedesktop stuff.
They have infuriatingly similar names; one of the changes is also to
change the name of --{no-,}add-needed to be more obvious.
--no-as-needed is already the default behaviour, and means "libraries
specified with -lfoo will be emitted into the link output in a DT_NEEDED
entry, regardless of whether any symbols from libfoo are used in the
link output object itself". This may mean your binary or library ends
up with more dependencies than it needs, but is generally harmless.
Not so harmless, IMHO, causing unecessary deps in producing RPM. IIRC
there was some discussion on this in the past. Many of these errors was caused from using AC_CHECK_LIB autoconf macro and not AC_SEARCH_LIB in configure.ac
there was some discussion on this in the past. Many of these errors was caused from using AC_CHECK_LIB autoconf macro and not AC_SEARCH_LIB in configure.ac
--no-add-needed is quite different. Your binary a.out uses symbols from
libfoo and libbar. libfoo is linked against libbar. But your link line
only says -lfoo. --add-needed behaviour, the old default, would
implicitly add a "-lbar" as well. --no-add-needed, the new default,
will not, and therefore your link will probably fail.
This is the case described in the libtool manual
http://www.gnu.org/software/libtool/manual/html_node/Inter_002dlibrary-dependencies.html#Inter_002dlibrary-dependencies
Nice to know that Fedora will have the same behavior of the AIX libraries in this area, if I understood correctly the topic under discussion.
Regards
Regards
Nice to know that Fedora will have the same behavior of the AIX libraries in this area, if I understood correctly the topic under discussion.
Regards
Regards
- ajax
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