[poppler] gfile.cc fails to build on macos due to statbuf.st_mtim

Sat Mar 3 20:15:48 UTC 2018

And this time around, without a bunch of typos... Sorry for the noise.

Am 03.03.2018 um 21:03 schrieb Adam Reichold:
> Hello again,
> 
> attached is a patch against master that fixes the Clang/libc++ linking
> issue with the cpp frontend's text_box_data destructor and the
> non-standard high-resolution mtime field name on Mac OS X.
> 
> Best regards, Adam.
> 
> Am 03.03.2018 um 20:18 schrieb Albert Astals Cid:
>> El divendres, 2 de març de 2018, a les 13:24:37 CET, suzuki toshiya va 
>> escriure:
>>> Dear Adam,
>>>
>>> Thank you always for rewriting in C++ way!
>>>
>>>> If you are uncomfortable with the CMake- and preprocessor-based
>>>> solution, you can solve such issues using templates as shown in
>>>>
>>>> https://github.com/adamreichold/poppler/commit/68f46dce62ad97bdbb22bf79ac5
>>>> 0c128d899a302
>>> Waao, it looks very smart. I'm quite sure that such smart idea
>>> cannot come to my rusted head living in C89 world :-)
>>> I'm *not* uncomfortable with cmake + preprocessor solution, but
>>> yours is far better than mine.
>>>
>>> If somebody finds new variant using something different from
>>> st_mtim, st_mtimespec - in my patch, CMakeList.txt & gfiles.cc
>>> should be changed, and re-run cmake. But in your patch, only
>>> gfiles.cc is needed to be modified, and no need to re-run cmake.
>>> It would be easier for further tweaking (if somebody needs).
>>>
>>> I want to hear other reviewers comment.
>>
>> This kind of template substitution by "failure" are a bit weird to get around, 
>> but on the other hand it's quite self contained and i guess you could add some 
>> text explaining "this substitution is used on Darwin" and "this substitution 
>> is used on Linux".
>>
>> I'm fine with that, but you're going to need to send a patch against poppler 
>> git not against mpsuzuki's repo if you want inclusion upstream :)
>>
>> Cheers,
>>   Albert
>>
>>>
>>> Regards,
>>> mpsuzuki
>>>
>>> Adam Reichold wrote:
>>>> Hello,
>>>>
>>>> If it works on POSIX and builds on Darwin, it looks good to me. What I
>>>> would like would be else clauses in the CMake and preprocessor
>>>> definitions that give proper error messages. (Or maybe use the POSIX
>>>> variant as the default and only use mtimespec if as an override.)
>>>>
>>>> If you are uncomfortable with the CMake- and preprocessor-based
>>>> solution, you can solve such issues using templates as shown in
>>>>
>>>> https://github.com/adamreichold/poppler/commit/68f46dce62ad97bdbb22bf79ac5
>>>> 0c128d899a302
>>>>
>>>> with the related Travis build being
>>>>
>>>> https://travis-ci.org/adamreichold/poppler/builds/348193138
>>>>
>>>> Best regards, Adam.
>>>>
>>>> Am 02.03.2018 um 03:34 schrieb suzuki toshiya:
>>>>> Hi,
>>>>>
>>>>> It seems that the counterpart in macOS libc corresponding to
>>>>> stat.st_mtim is stat.st_mtimespec.
>>>>> https://opensource.apple.com/source/xnu/xnu-201.5/bsd/sys/stat.h.auto.htm
>>>>> l
>>>>>
>>>>> I wrote a patch testing st_mtim availability by CHECK_STRUCT_HAS_MEMBER()
>>>>> suggested by William, and also testing st_mtimespec too, and reflect
>>>>> the result to the macro GET_MTIM_FROM_STATBUF().
>>>>> https://github.com/mpsuzuki/poppler/commit/79d00ac08d672d572a7ec310b5a27e
>>>>> b66c956e4c
>>>>>
>>>>> Building on travis-ci.org finishes successfully. Yet I'm
>>>>> unsure such macro is following to the coding style of poppler.
>>>>> Also if anybody has a testing code to evaluate the code works
>>>>> well (do you have to make 2 file with nsec difference of the
>>>>> timestamp?). Please give me comment...
>>>>>
>>>>> Regards,
>>>>> mpsuzuki
>>>>>
>>>>> On 2/19/2018 1:42 PM, William Bader wrote:
>>>>>> Can you test for it in cmake?
>>>>>> https://cmake.org/cmake/help/v3.0/module/CheckStructHasMember.html
>>>>>>
>>>>>> ________________________________
>>>>>> From: poppler <poppler-bounces at lists.freedesktop.org> on behalf of
>>>>>> Jeroen Ooms <jeroen at berkeley.edu> Sent: Sunday, February 18, 2018 6:29
>>>>>> PM
>>>>>> To: Ihar Filipau
>>>>>> Cc: poppler at lists.freedesktop.org
>>>>>> Subject: Re: [poppler] gfile.cc fails to build on macos due to
>>>>>> statbuf.st_mtim>>> 
>>>>>> On Mon, Feb 12, 2018 at 3:04 PM, Ihar Filipau <thephilips at gmail.com> 
>> wrote:
>>>>>>> On 2/12/18, Jeroen Ooms <jeroen at berkeley.edu> wrote:
>>>>>>>> On Sun, Feb 11, 2018 at 12:11 PM, Albert Astals Cid <aacid at kde.org> 
>> wrote:
>>>>>>>>> You're never assigning to tv_nsec in there but still use it in a
>>>>>>>>> comparison,
>>>>>>>>> that needs fixing.
>>>>>>>>
>>>>>>>> You are right. I think we should compare modification time only by
>>>>>>>> seconds. The standard definition of 'struct stat' only specifies
>>>>>>>> st_ctime, so I don't think there is a portable way to get nanoseconds:
>>>>>>>> http://pubs.opengroup.org/onlinepubs/009695399/basedefs/sys/stat.h.htm
>>>>>>>> l
>>>>>>>
>>>>>>> That's an old version of POSIX. Check the newer version:
>>>>>>>
>>>>>>> http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_stat.h.htm
>>>>>>> l
>>>>>>> IOW, there is a standard portable way - since 2008, 10 years ago. It's
>>>>>>> just Mac OS X hasn't updated its POSIX support after v6, from
>>>>>>> 2004.
>>>>>>
>>>>>> OK so how do you suggest this should be fixed? It would be great if
>>>>>> things would keep working on Mac OS.
>>>>>
>>>>> _______________________________________________
>>>>> poppler mailing list
>>>>> poppler at lists.freedesktop.org
>>>>> https://lists.freedesktop.org/mailman/listinfo/poppler
>>>
>>> _______________________________________________
>>> poppler mailing list
>>> poppler at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/poppler
>>
>>
>>
>>
>>
>>
>>
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