[Scons-users] SHLIBVERSION questions

Sun Jun 14 14:32:44 EDT 2015

Order of events:

   1. make_ready called on node libcc.so.0.1.0, action = gcc -o
   libcc.so.0.1.0 -shared cc.os
      1. At this point, node libcc.so.0.1.0 bact differs from
      .sconsign.dblite (IE. the correct value)
      2. Node marked as requiring update
      2. Tool/__init__.py:VersionedSharedLibrary executes and modifies the
   ShLinkAction
      1. The action is now correct and match the .sconsign.dblite value,
      action = gcc -o libcc.so.0.1.0 -shared -Wl,-Bsymbolic
      -Wl,-soname=libcc.so.0 cc.os
   3. .sconsign.dblite written with action from step 2

I hope this marks sense.  Not immediately sure how to resolve.

V/R,

William

On Sun, Jun 14, 2015 at 2:01 PM, William Blevins <wblevins001 at gmail.com>
wrote:

> I think my original assumption was silly.  More like the command is
> changing after the initial action is created...
>
> V/R,
> William
>
> On Sun, Jun 14, 2015 at 1:23 PM, William Blevins <wblevins001 at gmail.com>
> wrote:
>
>> Here is some additional information for anyone with indepth knowledge of
>> the VersionedSharedLibrary tool.
>>
>> Sample SConstruct: SharedLibrary( 'cc', 'cc.c', SHLIBVERSION = '0.1.0' )
>>
>> bactsig is computed as md5( executor.get_contents() ) and the executor
>> contents differ between lookups at byte 2828 line 162.
>>
>> Pass 1: "S),(N.,N.,N.),()gcc -o libcc.so.0.1.0 -shared cc.osgcc -o
>> libcc.so.0.1.0 -shared cc.os"
>> Pass 2: "S),(N.,N.,N.),()gcc -o libcc.so.0.1.0 -shared -Wl,-Bsymbolic
>> -Wl,-soname=libcc.so.0 cc.osgcc -o libcc.so.0.1.0 -shared -Wl,-Bsymbolic
>> -Wl,-soname=libcc.so.0 cc.os"
>>
>> What I see on the command line: "gcc -o libcc.so.0.1.0 -shared
>> -Wl,-Bsymbolic -Wl,-soname=libcc.so.0 cc.os"
>>
>> Seems that the issue is that the symlink targets are getting turned into
>> libcc.so Node rather than being there OWN node.  We may need to add symlink
>> handling to Node disambiguate?
>>
>> V/R,
>> William
>>
>> On Sun, Jun 14, 2015 at 11:55 AM, William Blevins <wblevins001 at gmail.com>
>> wrote:
>>
>>> I'm looking at the Node object code and I see that get_binfo gets called
>>> twice for versioned shared libraries but the bactsig changes between calls.
>>>
>>> I'll try and determine the delta.
>>>
>>> On Sat, Jun 6, 2015 at 6:55 PM, Paweł Tomulik <ptomulik at meil.pw.edu.pl>
>>> wrote:
>>>
>>>> Ok, submitted: http://scons.tigris.org/issues/show_bug.cgi?id=3006
>>>>
>>>> W dniu 06.06.2015 o 22:23, Bill Deegan pisze:
>>>> > Seems like a bug.
>>>> > Please file with a simple reproducible test case.
>>>> >
>>>> > Thanks,
>>>> > Bill
>>>> >
>>>> > On Sat, Jun 6, 2015 at 3:53 PM, Paweł Tomulik <
>>>> ptomulik at meil.pw.edu.pl
>>>> > <mailto:ptomulik at meil.pw.edu.pl>> wrote:
>>>> >
>>>> >
>>>> >     W dniu 06.06.2015 o 18:59, Bill Deegan pisze:
>>>> >     > What version of SCons are you running?
>>>> >
>>>> >
>>>> >     ptomulik at barakus:$ scons --version
>>>> >     SCons by Steven Knight et al.:
>>>> >             script: v2.3.4, 2014/09/27 12:51:43, by garyo on lubuntu
>>>> >             engine: v2.3.4, 2014/09/27 12:51:43, by garyo on lubuntu
>>>> >             engine path: ['/usr/local/lib/scons-2.3.4/SCons']
>>>> >     Copyright (c) 2001 - 2014 The SCons Foundation
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >     > There have been some fixes since 2.3.4 for this code
>>>> >     > Can you try running the tip of default?
>>>> >
>>>> >
>>>> >     Tip (b6cecd171b57) does the same.
>>>> >
>>>> >
>>>> >     >
>>>> >     > -Bill
>>>> >     >
>>>> >     > On Fri, Jun 5, 2015 at 9:07 AM, Paweł Tomulik <
>>>> ptomulik at meil.pw.edu.pl <mailto:ptomulik at meil.pw.edu.pl>
>>>> >     > <mailto:ptomulik at meil.pw.edu.pl <mailto:ptomulik at meil.pw.edu.pl
>>>> >>>
>>>> >     wrote:
>>>> >     >
>>>> >     >     I have this simple sconstruct:
>>>> >     >
>>>> >     >     env = Environment()
>>>> >     >     tgt = env.SharedLibrary('test', ['test.cpp'],
>>>> >     SHLIBVERSION='0.1.0')
>>>> >     >     print tgt
>>>> >     >
>>>> >     >     I observed, that the linking command is invoked each time I
>>>> >     run scons,
>>>> >     >     which is wrong:
>>>> >     >
>>>> >     >     ptomulik at barakus:$ scons -Q
>>>> >     >     ['libtest.so.0.1.0']
>>>> >     >     g++ -o libtest.so.0.1.0 -shared -Wl,-Bsymbolic
>>>> >     -Wl,-soname=libtest.so.0
>>>> >     >     test.os
>>>> >     >     ptomulik at barakus:$ scons -Q
>>>> >     >     ['libtest.so.0.1.0']
>>>> >     >     g++ -o libtest.so.0.1.0 -shared -Wl,-Bsymbolic
>>>> >     -Wl,-soname=libtest.so.0
>>>> >     >     test.os
>>>> >     >
>>>> >     >     debug=explain shows this:
>>>> >     >
>>>> >     >     ptomulik at barakus:$ scons -Q --debug=explain
>>>> >     >     ['libtest.so.0.1.0']
>>>> >     >     scons: rebuilding `libtest.so.0.1.0' because the contents of
>>>> >     the build
>>>> >     >     action changed
>>>> >     >                    action: SharedFlagChecker(target, source,
>>>> env)
>>>> >     >                            VersionedSharedLibrary(target,
>>>> source, env)
>>>> >     >     g++ -o libtest.so.0.1.0 -shared -Wl,-Bsymbolic
>>>> >     -Wl,-soname=libtest.so.0
>>>> >     >     test.os
>>>> >     >
>>>> >     >
>>>> >     >     Is it something already known, or shall I submit a bug?
>>>> >     >
>>>> >     >     Anyway, the SharedLibrary builder creates symlinks, but they
>>>> >     do not
>>>> >     >     appear in the function result (tgt contains only the
>>>> library).
>>>> >     Is this a
>>>> >     >     bug or a feature? How can I guess what are the nodes
>>>> produced
>>>> >     by the
>>>> >     >     builder?
>>>> >     >
>>>> >     >     --
>>>> >     >     Pawel Tomulik
>>>> >     >     _______________________________________________
>>>> >     >     Scons-users mailing list
>>>> >     >     Scons-users at scons.org <mailto:Scons-users at scons.org>
>>>> >     <mailto:Scons-users at scons.org <mailto:Scons-users at scons.org>>
>>>> >     >     https://pairlist4.pair.net/mailman/listinfo/scons-users
>>>> >     >
>>>> >     >
>>>> >     >
>>>> >     >
>>>> >     > _______________________________________________
>>>> >     > Scons-users mailing list
>>>> >     > Scons-users at scons.org <mailto:Scons-users at scons.org>
>>>> >     > https://pairlist4.pair.net/mailman/listinfo/scons-users
>>>> >     >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >     --
>>>> >     Pawel Tomulik
>>>> >     _______________________________________________
>>>> >     Scons-users mailing list
>>>> >     Scons-users at scons.org <mailto:Scons-users at scons.org>
>>>> >     https://pairlist4.pair.net/mailman/listinfo/scons-users
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > _______________________________________________
>>>> > Scons-users mailing list
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>>>> >
>>>>
>>>>
>>>> --
>>>> Pawel Tomulik
>>>> _______________________________________________
>>>> Scons-users mailing list
>>>> Scons-users at scons.org
>>>> https://pairlist4.pair.net/mailman/listinfo/scons-users
>>>>
>>>
>>>
>>
>
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