Friday, 8 June 2018

Re: -Wl,-Bsymbolic-functions in Ubuntu but not debian/ why?

Thanks all, very useful information.

On Thu, Jun 7, 2018 at 7:45 PM, Steve Langasek <> wrote:
Hi Andreas,

Small addendum to Dimitri's comments:

On Thu, Jun 07, 2018 at 02:45:12PM -0300, Andreas Hasenack wrote:

> does anybody recall why Ubuntu has -Wl,-Bsymbolic-functions in
> dpkg-buildflags --get LDFLAGS but not Debian? It seems to be the case for
> about 10 years now, according to dpkg's changelog.

> I came across this change because of a delta we have been carrying in the
> autofs package for fix segfaults on startup and other issues:

> Not working
> properly with compile options "-symbolic-functions"
> autofs start
> fails: segfault at 0 ip ...

> d/rules has had a trick to drop -Bsymbolic-functions from LDFLAGS at build
> time (hello sed), but it still leaks through when building the lookup_ldap
> module via $(krb5-config --libs), hence the current
> d/p/fix-lookup-ldap-crash.patch patch we have been carrying.

This leaking of linker flags is also a bug in krb5-config.

Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                                    

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