[Bug c/52853] New: problem in stddef.h, Blender build fails

[Bug c/52853] New: problem in stddef.h, Blender build fails

[montagne29 at wanadoo dot fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

             Bug #: 52853
           Summary: problem in stddef.h, Blender build fails
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: montagne29@wanadoo.fr


When trying to compile Blender (trunk) with new gcc-4.7, it fails with
following message:

[ 68%] Building CXX object
source/gameengine/VideoTexture/CMakeFiles/ge_videotex.dir/VideoFFmpeg.cpp.o
In file included from /usr/include/unistd.h:227:0,
                 from /usr/include/python3.2mu/Python.h:36,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/Expressions/KX_Python.h:47,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/Expressions/PyObjectPlus.h:43,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/VideoTexture/VideoBase.h:31,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/VideoTexture/VideoFFmpeg.h:69,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/VideoTexture/VideoFFmpeg.cpp:43:
/usr/lib/gcc/x86_64-linux-gnu/4.7/include/stddef.h:417:43: error: operator '&&'
has no right operand
In file included from /usr/include/signal.h:349:0,
                 from /usr/include/python3.2mu/pyfpe.h:129,
                 from /usr/include/python3.2mu/Python.h:146,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/Expressions/KX_Python.h:47,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/Expressions/PyObjectPlus.h:43,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/VideoTexture/VideoBase.h:31,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/VideoTexture/VideoFFmpeg.h:69,
                 from
/home/i7deb64/blender-2.5-svn/__work__/blender_src/source/gameengine/VideoTexture/VideoFFmpeg.cpp:43:
/usr/lib/gcc/x86_64-linux-gnu/4.7/include/stddef.h:417:43: error: operator '&&'
has no right operand


So it appears that in the stddef.h's line

#if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \
  || (defined(__cplusplus) && __cplusplus >= 201103L)

…when __cplusplus is not defined, that code is wrong (I guess…)???

Anyway, I can’t build Blender’s GE currently :)

Notes:
*I’m using Debian testing package (4.7.0-1)
*Other people have encountered the same problem with various distributions (see
http://lists.blender.org/pipermail/bf-committers/2012-March/035990.html )

[Bug c/52853] problem in stddef.h, Blender build fails

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2012-04-04
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-04 09:18:00 UTC ---
Please attach preprocessed source.

[Bug c/52853] problem in stddef.h, Blender build fails

[montagne29 at wanadoo dot fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

--- Comment #2 from Bastien Montagne <montagne29 at wanadoo dot fr> 2012-04-04 10:56:04 UTC ---
Created attachment 27084
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27084
preprocessed version of VideoFFmpeg.cpp

[Bug c++/52853] problem in stddef.h, Blender build fails

[montagne29 at wanadoo dot fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

Bastien Montagne <montagne29 at wanadoo dot fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |c++

--- Comment #3 from Bastien Montagne <montagne29 at wanadoo dot fr> 2012-04-04 10:57:21 UTC ---
Hmm… Actually, it’s a c++ file, sorry for that mistake… :/

Attached the .i version of the file generating the error.

[Bug c++/52853] problem in stddef.h, Blender build fails

[montagne29 at wanadoo dot fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

--- Comment #4 from Bastien Montagne <montagne29 at wanadoo dot fr> 2012-04-04 10:59:23 UTC ---
Created attachment 27085
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27085
preprocessed version of VideoFFmpeg.cpp

grmpg… I should awake, some times. sorry again

[Bug c++/52853] problem in stddef.h, Blender build fails

[montagne29 at wanadoo dot fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

Bastien Montagne <montagne29 at wanadoo dot fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #27084|0                           |1
        is obsolete|                            |

--- Comment #5 from Bastien Montagne <montagne29 at wanadoo dot fr> 2012-04-04 11:00:10 UTC ---
Comment on attachment 27084
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27084
preprocessed version of VideoFFmpeg.cpp

wrong archive attached, sorry.

[Bug c++/52853] problem in stddef.h, Blender build fails

[montagne29 at wanadoo dot fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

--- Comment #6 from Bastien Montagne <montagne29 at wanadoo dot fr> 2012-04-04 11:08:45 UTC ---
Bah, it’s not my day :/

Now it appears the error was on our side – quoting commit r45392 on blender svn
(ten minutes ago):

"fix for building on linux with gcc4.7, an error was caused by undefining
__cplusplus, so as to work with mingw4.4"

So this report can be closed, I think. Sorry for the noise.

[Bug c++/52853] problem in stddef.h, Blender build fails

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-04-04 11:42:33 UTC ---
(In reply to comment #6)
> "fix for building on linux with gcc4.7, an error was caused by undefining
> __cplusplus, so as to work with mingw4.4"

Don't undefine __cplusplus, that's never appropriate.