Trying to head off a problem before it's a problem...
-------- Original Message -------- Subject: gcc in natty now passes --as-needed by default to the linker Date: Mon, 15 Nov 2010 12:26:27 +0100 From: Matthias Klose doko@ubuntu.com Reply-To: ubuntu-devel-discuss@lists.ubuntu.com To: ubuntu-devel ubuntu-devel-announce@lists.ubuntu.com, ubuntu-devel ubuntu-devel@lists.ubuntu.com
There is a second change to the linking in natty; as announced in [1], --no-add-needed/--no-copy-dt-needed-entries is passed by default, with the current gcc in natty, --as-needed is passed as well. Please see [2] for implications (runtime failures) and a list of packages which might be affected.
To revert this change on a per package basis, pass --no-as-needed to the linker (-Wl,--no-as-needed in LDFLAGS). To add an explicit dependency on a library use --no-as-needed -lfoo --as-needed.
Please tag bug reports with `as-needed' if you see runtime failures caused by this change (mostly unresolvable symbols referenced by plugins and ldopened objects).
Matthias
[1] https://lists.ubuntu.com/archives/ubuntu-devel-announce/2010-October/000772.... [2] http://wiki.debian.org/ToolChain/DSOLinking#Onlylinkwithneededlibraries