Re: modules have a soname?

Simon Josefsson <[email protected]> Tue, 10 Nov 2015 10:40:24 +0100

Newsgroups	gmane.comp.gnu.libtool.general
Message-ID	<[email protected]>

Simon Josefsson <[email protected]> writes:

>> In other words, this is probably an upstream Makefile issue rather than a
>> problem with either libtool or dpkg-shlibdeps.
>
> Upstream do use -avoid-version in their Makefile.am, but I just noticed
> that it might not be used in all places.  I'll double check.

It doesn't work even in the cases where upstream's Makefile.am uses
-avoid-version.  Libtool is still adding a -Wl,-soname:

jas@latte:~/src/jabberd2-jas/storage$ /bin/bash ../libtool  --tag=CC   --mode=link gcc -I../c2s -I.. -g -O2 -funsigned-char -module -avoid-version  -o authreg_anon.la -rpath /usr/local/lib/jabberd authreg_anon.lo -lexpat -L../util -lssl -lcrypto -lgsasl -ludns -lidn -lexpat -lresolv -lcrypt  -ldl -lz
libtool: link: rm -fr  .libs/authreg_anon.la .libs/authreg_anon.lai .libs/authreg_anon.so
libtool: link: gcc -shared  -fPIC -DPIC  .libs/authreg_anon.o   -L../util -lssl -lcrypto /usr/lib/libgsasl.so -ludns -lidn /usr/lib/x86_64-linux-gnu/libexpat.so -lresolv -lcrypt -ldl -lz  -O2   -Wl,-soname -Wl,authreg_anon.so -o .libs/authreg_anon.so
libtool: link: ( cd ".libs" && rm -f "authreg_anon.la" && ln -s "../authreg_anon.la" "authreg_anon.la" )
jas@latte:~/src/jabberd2-jas/storage$ 

Is this intentional, or should we start to track down how -Wl,-soname
was added and treat that as a bug?  The manual says:

'-avoid-version'
     Tries to avoid versioning (*note Versioning::) for libraries and
     modules, i.e. no version information is stored and no symbolic
     links are created.  If the platform requires versioning, this
     option has no effect.

I don't know whether libtool regards the debian/gnu/linux/elf platform
as requiring versioning or not.

This is libtool 2.4.2 from Debian, if it matters.

/Simon

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