[MPlayer-users] any success compiling with gcc-6 yet?

[Arthur Marsh]

Alexander Strasser wrote on 20/12/15 10:38:
> Hi Arthur,
>
>    thanks for testing build with gcc-6.
>
> On 2015-12-20 08:46 +1030, Arthur Marsh wrote:
>> Arthur Marsh wrote on 14/12/15 09:49:
>>> Arthur Marsh wrote on 14/12/15 06:45:
>>>> Hi, I've tried building mplayer with gcc-6 but it failed with a compiler
>>>> error (which I can post if anyone's interested).
>>>>
>>>> Has anyone else been attempting to build mplayer with gcc-6?
>>>>
>>>> Arthur.
>>>
>>> libavcodec/pngdec.c:1086:12: internal compiler error: in contains_point,
>                                  ^^^^^^^^^^^^^^^^^^^^^^^
>
>    I read ICE here...
>
>>> at diagnostic-show-locus.c:340
>>>   static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
>>>              ^~~~~~~~~~~~~~~~~~~
>>>
>>> 0x102bf6f contains_point
>>>          ../../src/gcc/diagnostic-show-locus.c:340
>>> 0x102bf6f get_state_at_point
>>>          ../../src/gcc/diagnostic-show-locus.c:684
>>> 0x102c518 print_source_line
>>>          ../../src/gcc/diagnostic-show-locus.c:538
>>> 0x102c518 diagnostic_show_locus(diagnostic_context*, diagnostic_info
>>> const*)
>>>          ../../src/gcc/diagnostic-show-locus.c:803
>
>
>    ...and from the remaining back trace one could assume
> an error manifesting in the diagnostig reporting machinery
> from gcc.
>
>>> 0x63e6d0 c_diagnostic_finalizer
>>>          ../../src/gcc/c-family/c-opts.c:167
>>> 0x102a248 diagnostic_report_diagnostic(diagnostic_context*,
>>> diagnostic_info*)
>>>          ../../src/gcc/diagnostic.c:800
>>> 0x102b2f0 warning_at(unsigned int, int, char const*, ...)
>>>          ../../src/gcc/diagnostic.c:1029
>>> 0xb3cfd1 warn_uninit
>>>          ../../src/gcc/tree-ssa-uninit.c:157
>>> 0xb42446 warn_uninitialized_phi
>>>          ../../src/gcc/tree-ssa-uninit.c:2366
>>> 0xb42446 execute
>>>          ../../src/gcc/tree-ssa-uninit.c:2459
>>> Please submit a full bug report,
>>> with preprocessed source if appropriate.
>>> Please include the complete backtrace with any bug report.
>>> See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
>>> common.mak:60: recipe for target 'libavcodec/pngdec.o' failed
>
>    libavcodec/pngdec.c is in FFmpeg, but as I said
> before it very much looks like a bug in gcc.
>
>>> building on Debian x86-64.
>>
>> Another weird side-effect of running ./configure with --cc=gcc-6 is that
>> dirac support gets removed.
>>
>> I'll wait until Debian releases another snapshot unless anyone can suggest
>> how to narrow down the bug into a reportable state.
>
>    Maybe you should try reporting problems with gcc snapshots
> from Debian to Debian first? In the hope they could handle
> your report efficiently and maybe forward to gcc upstream
> or e.g. send you to us if they think it is not a gcc problem.
>
>
>    Alexander

OK, I received the reply:

this bug report is useless without the full stacktrace, the command line 
options used, and the preprocessed source.

How would I provide that for pngdec.c from an mplayer build?

(e.g. options to ./configure, manual editing of makefile...?)

Arthur.