Re: [s6] debian packaging

From: Buck Evan <buck_at_yelp.com>
Date: Wed, 12 Aug 2015 10:14:44 -0700

This is the compilation line for libexecline.so

exec gcc -o libexecline.so -std=c99 -fomit-frame-pointer -fno-exceptions
-fno-unwind-tables -fno-asynchronous-unwind-tables -Wa,--noexecstack
-fno-stack-protector
-pipe -Wall -fPIC -Wl,--hash-style=both -L/usr/lib/skalibs
 -L/usr/lib/x86_64-linux-gnu -shared -Wl,-soname,libexecline.so.2
src/libexecline/el_execsequence.lo sr
c/libexecline/el_getstrict.lo src/libexecline/el_parse.lo
src/libexecline/el_parse_from_buffer.lo
src/libexecline/el_parse_from_string.lo src/libexecline/el_popenv
.lo src/libexecline/el_pushenv.lo src/libexecline/el_semicolon.lo
src/libexecline/el_spawn0.lo src/libexecline/el_spawn1.lo
src/libexecline/el_substandrun.lo src/l
ibexecline/el_substandrun_str.lo src/libexecline/el_substitute.lo
src/libexecline/el_transform.lo src/libexecline/el_vardupl.lo
src/libexecline/exlsn_define.lo src
/libexecline/exlsn_elglob.lo src/libexecline/exlsn_import.lo
src/libexecline/exlsn_multidefine.lo src/libexecline/exlsn_exlp.lo
src/libexecline/exlsn_main.lo src/l
ibexecline/exlsn_free.lo src/libexecline/exlp.lo

I don't see -lskarnet.

On Wed, Aug 12, 2015 at 10:12 AM, Buck Evan <buck_at_yelp.com> wrote:

> Removing the execline patch results in:
>
>
> dh_shlibdeps -O--parallel -O--autodest
> dpkg-shlibdeps: warning: symbol waitpid_nointr used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol PROG used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol stralloc_catb used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol env_get2 used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol env_string used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol byte_chr used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol pathexec0_run used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol str_start used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol stralloc_free used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: symbol uint320_scan_base used by
> debian/execline/usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0 found in
> none of the libraries
> dpkg-shlibdeps: warning: 18 other similar warnings have been skipped (use
> -v to see them all)
>
>
>
> The manpage
> <http://manpages.ubuntu.com/manpages/jaunty/man1/dpkg-shlibdeps.1.html>
> says:
>
> *symbol* *sym* *used* *by* *binary* *found* *in* *none* *of* *the* *libraries.*
> The indicated symbol has not been found in the libraries linked
> with the binary. The *binary* is most likely a library and it
> needs to be linked with an additional library during the build
> process (option *-l**library* of the linker).
>
>
>
> It's true that the execline.so doesn't link to skalibs.so even though it requires its symbols:
>
>
> $ ldd /usr/lib/x86_64-linux-gnu/libexecline.so.2.1.3.0
> linux-vdso.so.1 (0x00007ffff2dfe000)
> libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff5dcf8c000)
> /lib64/ld-linux-x86-64.so.2 (0x00007ff5dd53f000)
>
>
>
>
>
> On Wed, Aug 12, 2015 at 3:05 AM, Laurent Bercot <ska-skaware_at_skarnet.org>
> wrote:
>
>>
>> (Please follow-up this part of the thread to the skaware mailing-list.)
>>
>> On 12/08/2015 08:37, Buck Evan wrote:
>>
>>> -
>>>
>>> https://github.com/bukzor/s6-packaging/blob/dockerize/execline/debian/patches/02_link_against_libskarnet.patch
>>> -
>>>
>>> https://github.com/bukzor/s6-packaging/blob/dockerize/s6/debian/patches/75_dot_so_link_skarlib.patch
>>>
>>>
>>> Again this is because the build derps without them, but I forget the
>>> exact
>>> failure mode.
>>> I'll track down details upon request.
>>>
>>
>> The parts for binaries and static libraries are clearly invalid. If
>> something breaks while building those, then there's a problem with the
>> way the build is invoked, or the options to configure.
>> For static libraries, -lskarnet is nonsense. For binaries, -lskarnet
>> is already listed in the requirements ($^) and should be translated
>> to a .a or .so by vpath resolution, so it is incorrect to list it
>> again. Something is definitely wrong if the package builds with them
>> while it won't build without.
>>
>> I'm still unsure about the shared libraries parts. I don't think
>> it should be needed, but my test suite isn't up to par and I need to
>> update it to test the problematic cases and understand exactly what
>> is happening.
>>
>> In the meantime, please find the problem with your build and fix it.
>> Chances are you won't need the shared libraries patch either once
>> you've done that. :)
>>
>>
>> It seems likely to me that you'll want to figure out and fix these two
>>> issues given your response to the above patch.
>>> Is that right?
>>>
>>
>> Yes, and now you have work to do too. :P
>>
>> --
>> Laurent
>>
>>
>
Received on Wed Aug 12 2015 - 17:14:44 UTC

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