[Scons-users] Intermiddent build error on Windows - cl : Command line error D8022 : cannot open 'c:\users\admini~1\appdata\local\temp\tmpekylod.lnk'
Shane Gannon
sgannon200 at gmail.com
Wed Sep 7 13:27:08 EDT 2016
One other update. Might explain the *tempfile_cmdlist* issue somewhat.
I've identified a section of the build where, if I disable it, the build
passes when using the standard 2.5.0 release.
This part of the build does something a little unusual.
*sources = getAllSources() # Get all the .cpp files*
*objFiles = envLocal.Object(sources) # Create a group of .obj files from
the sources*
*artifacts = envLocal.SharedLibrary('Library', sources) # Create a shared
library from the sources*
*envTest['LIBS'].append(objFiles) # Add the .obj files to the link path on
another environment*
*test_sources = getAllSources() # Get all the test .cpp files*
*envTest.Program('TestExecutable', test_sources) # Create a test executable
which re-uses the .obj files from LIBS on another environment*
This might cause issues for the *tempfile_cmdlist* check. But there are 3
other sections of the build that do the same thing and they're fine.
On Wed, Sep 7, 2016 at 4:27 PM, Shane Gannon <sgannon200 at gmail.com> wrote:
> Hi Bill
>
> In a local version of SCons 2.5.0 I made the following changes to
> SCons/Platform/__init__.py
>
> # Check if we already created the temporary file for this target
> # It should have been previously done by Action.strfunction() call
> #node = target[0] if SCons.Util.is_List(target) else target
> #cmdlist = getattr(node.attributes, 'tempfile_cmdlist', None) \
> # if node is not None else None
> #if cmdlist is not None :
> # return cmdlist
> .........
> # Store the temporary file command list into the target
> Node.attributes
> # to avoid creating two temporary files one for print and one for
> execute.
> cmdlist = [ cmd[0], prefix + native_tmp + '\n' + rm, native_tmp ]
> #if node is not None:
> # try :
> # setattr(node.attributes, 'tempfile_cmdlist', cmdlist)
> # except AttributeError:
> # pass
> return cmdlist
>
> i.e. I commented out the *tempfile_cmdlist* check.
>
> The comments lead me to believe this code is a performance fix. I assumed
> removing it would not cause breaks.
>
> That seems to be the case. SCons did not break. Plus now my build succeeds.
>
> I'd guess that SCons is setting this attribute on a node. But that node is
> being used more than once in our build (really not sure if this is
> possible). When the node is first used tempfile_cmdlist is created as well
> as the temp file. But when it is re-used it detects that 'tempfile_cmdlist'
> already exists and does not bother to create a second temp file.
>
> Is that possible? What would make it specific to our build? i.e. Otherwise
> I assume more people would have reported this problem.
>
> Regards
> Shane
>
> On Wed, Sep 7, 2016 at 3:26 PM, Bill Deegan <bill at baddogconsulting.com>
> wrote:
>
>> Shane,
>>
>> I didn't see any change in the logic which opens, writes, or closes the
>> tmp files in those commits.
>> Only in the way it's used by mslink, and msvc and some messaging and
>> another test.
>>
>> -Bill
>>
>> On Wed, Sep 7, 2016 at 6:52 AM, Shane Gannon <sgannon200 at gmail.com>
>> wrote:
>>
>>> Hi William
>>>
>>> To be truthful I don't have the expertise to rule out SCon 2.3.4. But we
>>> have run thousands of builds on it without issue. In constrast on 2.5.0
>>> (and to a lesser extent 2.3.6 & 2.3.5) we can fully reproduce this problem.
>>>
>>> That suggests an edge condition was introduced by 2.3.5. I took a look
>>> back through the commit history and came across
>>>
>>> https://bitbucket.org/scons/scons/commits/bad59be7270dbbe62c
>>> 7868a532fad84480f95fae
>>> https://bitbucket.org/scons/scons/commits/9aa37cd21e99eb684a
>>> b6ae8f7b21e0a71751ac7f
>>> https://bitbucket.org/scons/scons/commits/da5785c5f30f852734
>>> b3f985b798a5508bfea9db
>>>
>>> which are consequetive commits by the same author (LaurentMarchelli). He
>>> was working on the SCons/Platform/__init__.py file and the TempFileMunge
>>> class. This is the class that creates the .lnk files.
>>>
>>> Regards
>>> Shane
>>>
>>> On Wed, Sep 7, 2016 at 2:16 PM, William Blevins <wblevins001 at gmail.com>
>>> wrote:
>>>
>>>> Shane,
>>>>
>>>> We can look into that specific revision, but if this is a race
>>>> condition, then it's possible that this is a problem in other versions. It
>>>> doesn't make much sense that the issue is not reproducible in version 2.4.0
>>>> unless there was a missing patch that was reapplied (which is unlikely but
>>>> not impossible).
>>>>
>>>> V/R,
>>>> William
>>>>
>>>> On Wed, Sep 7, 2016 at 8:30 AM, Shane Gannon <sgannon200 at gmail.com>
>>>> wrote:
>>>>
>>>>> I've been testing out some scenarios and here is what I discovered
>>>>>
>>>>> SCons 2.5.0 with vs2013 - Reproduced the problem
>>>>>
>>>>> SCons 2.3.6 with vs2013 - Reproduced the problem
>>>>>
>>>>> SCons 2.3.5 with vs2013 - Reproduced the problem
>>>>>
>>>>> SCons 2.5.0 with vs2013 on Windows 7 - Reproduced the problem
>>>>>
>>>>> SCons 2.4.0 on both Windows 10 & Window 7 - *Problem not reproduced*
>>>>>
>>>>> Seems this bug was introduced by Scons 2.3.5.
>>>>>
>>>>>
>>>>> On Wed, Sep 7, 2016 at 11:19 AM, Shane Gannon <sgannon200 at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> @Bill Deegan
>>>>>>
>>>>>> Both the 2013 & 2015 builders use Windows version 10.0.102540 Build
>>>>>> 10240.
>>>>>>
>>>>>> Windows Defender is disabled on the build machines. We took the
>>>>>> attitude that anti-virus protection was a waste of resources. Plus it
>>>>>> introduced unwanted variability to build speed.
>>>>>>
>>>>>> The Windows Search Indexing Service was enabled. But, after disabling
>>>>>> it, the problem persisted.
>>>>>>
>>>>>> I tested out SCons 2.5.0 with vs2013. It reproduced the problem. So
>>>>>> this issue may have been introduced since SCons 2.3.4.
>>>>>>
>>>>>> @Arvid Rosén
>>>>>>
>>>>>> Good suggestion. But we use ActivePython which has pywin32 built into
>>>>>> it. Verified that with pip list.
>>>>>>
>>>>>> On Wed, Sep 7, 2016 at 8:20 AM, Arvid Rosén <arvid at softube.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Do you have pywin32 installed btw?
>>>>>>>
>>>>>>> Arvid
>>>>>>>
>>>>>>> On 07 Sep 2016, at 01:27, Bill Deegan <bill at baddogconsulting.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>> Are you also upgrading your version of windows?
>>>>>>> Do you see the problem with scons 2.5.0 and MSVC 2013?
>>>>>>>
>>>>>>> This is not a known issue.
>>>>>>> However as Arvid said.. it can be related to Windows Defender and
>>>>>>> Search Indexing.
>>>>>>> Perhaps you can disable search indexing and see if it has any impact?
>>>>>>> You might try disabling windows defender for a short test as well...
>>>>>>> (though I wouldn't advise doing so in an insecure environment or for a long
>>>>>>> period of time..)
>>>>>>>
>>>>>>>
>>>>>>> On Tue, Sep 6, 2016 at 9:59 AM, Shane Gannon <sgannon200 at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Hi all
>>>>>>>>
>>>>>>>> I'm in the process of upgrading a Windows build machine. It's tool
>>>>>>>> set is moving to
>>>>>>>>
>>>>>>>> - Visual Studio 2015 Update 3
>>>>>>>> - scons 2.5.0
>>>>>>>> - msbuild 14.0.25420.1
>>>>>>>>
>>>>>>>> from
>>>>>>>>
>>>>>>>> - Visual Studio 2013 Update 4
>>>>>>>> - scons 2.3.4
>>>>>>>> - msbuild 12.0.31101
>>>>>>>>
>>>>>>>> But I'm getting an unexpected error.
>>>>>>>>
>>>>>>>> *cl : Command line error D8022 : cannot open
>>>>>>>> 'c:\users\admini~1\appdata\local\temp\tmpekylod.lnk'*
>>>>>>>>
>>>>>>>> This can occur once or multiple times in the first clean build.
>>>>>>>> i.e. With each occurence for a different file name. But if I then run a
>>>>>>>> rebuild the problem resolves itself.
>>>>>>>>
>>>>>>>> The .lnk file seems to be SCons specific. It's created in the temp
>>>>>>>> folder and contains something like
>>>>>>>>
>>>>>>>> */nologo /DEBUG /dynamicbase /fixed:no /OPT:REF /OPT:ICF
>>>>>>>> -ignore:4042 -ignore:4042 -ignore:4099 /nologo /DEBUG /dynamicbase
>>>>>>>> /fixed:no /OPT:REF /OPT:ICF -ignore:4042 /dll /out:mylibrary.dll .......*
>>>>>>>>
>>>>>>>> i.e. The command to execute.
>>>>>>>>
>>>>>>>> On Windows *cl* eats this up with
>>>>>>>>
>>>>>>>> *cl @c:\users\admini~1\appdata\local\temp\tmpekylod.lnk*
>>>>>>>>
>>>>>>>> and executes with the parameters found in the .lnk file.
>>>>>>>>
>>>>>>>> AFAIK this behaviour has existed in SCons since version 0.9.
>>>>>>>>
>>>>>>>> See
>>>>>>>>
>>>>>>>> http://www.scons.org/CHANGES.txt
>>>>>>>>
>>>>>>>> *RELEASE 0.90 - Wed, 25 Jun 2003 14:24:52 -0500*
>>>>>>>>
>>>>>>>> * - Use '.lnk' as the suffix on the temporary file for linking long
>>>>>>>> command lines (necessary for the Phar Lap linkloc linker).*
>>>>>>>>
>>>>>>>> But, for some reason reason, *some* .lnk files are not generated in time for me. Hence the build fails.
>>>>>>>>
>>>>>>>> Is this a known issue? Has it been introduced since scons 2.3.4? Is there any work around?
>>>>>>>>
>>>>>>>> I should mention that my builder
>>>>>>>>
>>>>>>>>
>>>>>>>> - Is a Windows 10 machine
>>>>>>>> - Has 20 cpu cores and runs scons -j 20
>>>>>>>> - Has 25Gb of RAM
>>>>>>>>
>>>>>>>> There may be a parallization problem here. But it is not an issue for the current build (which also uses -j 20). I experimented with using -j 10 but the problem persisted.
>>>>>>>>
>>>>>>>> I also choose to build only a sub-set of the projects. i.e. I excluded the tests. This allowed the build to pass.
>>>>>>>>
>>>>>>>> Any thoughts/suggestions?
>>>>>>>>
>>>>>>>> Regards
>>>>>>>>
>>>>>>>> Shane
>>>>>>>>
>>>>>>>>
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>>>>>>>>
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>>>>>>
>>>>>
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