Build failure with ffmpeg-5.0

[mgorny]

From https://bugs.gentoo.org/834408:

svdrpc.cpp: In member function ‘bool cSVDRPC::CmdQuit()’:
svdrpc.cpp:247:11: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  247 |   asprintf(&Option,"Quit\r\n");
      |   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~
svdrpc.cpp: In function ‘void noadMsg(const char*, const char*)’:
svdrpc.cpp:277:13: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  277 |     asprintf(&baseName,"mesg %s %s",msg,vend+1);
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
svdrpc.cpp:279:13: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  279 |     asprintf(&baseName,"mesg %s %s",msg, filename);
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
svdrpc.cpp:285:11: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  285 |   asprintf(&cp,"%s\r\n",baseName);
      |   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
tools.cpp: In function ‘const char* AddDirectory(const char*, const char*)’:
tools.cpp:249:11: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  249 |   asprintf(&buf, "%s/%s", DirName && *DirName ? DirName : ".", FileName);
      |   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tools.cpp: In function ‘bool RemoveEmptyDirectories(const char*, bool)’:
tools.cpp:334:17: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  334 |         asprintf(&buffer, "%s/%s", DirName, e->d_name);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tools.cpp: In function ‘bool SpinUpDisk(const char*)’:
tools.cpp:401:15: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  401 |       asprintf(&buf, "%s/vdr-%06d", *FileName ? FileName : ".", n);
      |       ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tools.cpp:403:15: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  403 |       asprintf(&buf, "%s.vdr-%06d", FileName, n);
      |       ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tools.cpp:413:15: warning: ignoring return value of ‘int system(const char*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  413 |         system("sync");
      |         ~~~~~~^~~~~~~~
tools.cpp: In function ‘int make_pidfile(const char*)’:
tools.cpp:943:8: warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  943 |   write(pidf,pidfilename,strlen(pidfilename));
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tools.cpp: In function ‘pid_t processInfo(const char*)’:
tools.cpp:973:13: warning: ignoring return value of ‘int asprintf(char**, const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  973 |     asprintf(&cmd,"ps -p %s -o start,time,cmd --no-heading",buffer);
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ffmpeg_decoder.cpp: In member function ‘virtual int FFMPegDecoder::decoder_init()’:
ffmpeg_decoder.cpp:153:9: error: ‘av_register_all’ was not declared in this scope
  153 |         av_register_all();
      |         ^~~~~~~~~~~~~~~
ffmpeg_decoder.cpp: In member function ‘virtual int FFMPegDecoder::openFile(cFileName*, cNoadIndexFile*)’:
ffmpeg_decoder.cpp:210:83: error: invalid conversion from ‘AVCodec**’ to ‘const AVCodec**’ [-fpermissive]
  210 | av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &pCodec, 0);
      |                                                             ^~~~~~~
      |                                                             |
      |                                                             AVCodec**

In file included from ffmpeg_decoder.h:10,
                 from ffmpeg_decoder.cpp:1:
/usr/include/libavformat/avformat.h:2161:41: note:   initializing argument 5 of ‘int av_find_best_stream(AVFormatContext*, AVMediaType, int, int, const AVCodec**, int)’
 2161 |                         const AVCodec **decoder_ret,
      |                         ~~~~~~~~~~~~~~~~^~~~~~~~~~~
ffmpeg_decoder.cpp:249:36: error: invalid conversion from ‘const AVCodec*’ to ‘AVCodec*’ [-fpermissive]
  249 |         pCodec=avcodec_find_decoder(pCodecPar->codec_id);
      |                ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
      |                                    |
      |                                    const AVCodec*
audiotools.cpp: In function ‘void initAVCodec()’:
audiotools.cpp:99:3: error: ‘avcodec_register_all’ was not declared in this scope
   99 |   avcodec_register_all();
      |   ^~~~~~~~~~~~~~~~~~~~
audiotools.cpp:105:31: error: invalid conversion from ‘const AVCodec*’ to ‘AVCodec*’ [-fpermissive]
  105 |   codec = avcodec_find_decoder(AV_CODEC_ID_MP3);
      |           ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
      |                               |
      |                               const AVCodec*

[bacardischmal]

bump, still the same issue

now start "make" to build noad
 and "make install" to install noad
>>> Source configured.
>>> Compiling source in /var/tmp/portage/media-video/noad-0.8.8/work/noad-0.8.8 ...
make -j3
make  all-am
make[1]: Entering directory '/var/tmp/portage/media-video/noad-0.8.8/work/noad-0.8.8'
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.   -DUSE_AVIOCONTEXT -D__STDC_CONSTANT_MACROS  -D_GNU_SOURCE -DFFMPEGDECODING   -DUSE_FFMPEG  -O2 -march=native -pipe -fomit-frame-pointer -c -o audiotools.o audiotools.cpp
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.   -DUSE_AVIOCONTEXT -D__STDC_CONSTANT_MACROS  -D_GNU_SOURCE -DFFMPEGDECODING   -DUSE_FFMPEG  -O2 -march=native -pipe -fomit-frame-pointer -c -o cchecklogo.o cchecklogo.cpp
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.   -DUSE_AVIOCONTEXT -D__STDC_CONSTANT_MACROS  -D_GNU_SOURCE -DFFMPEGDECODING   -DUSE_FFMPEG  -O2 -march=native -pipe -fomit-frame-pointer -c -o ccontrol.o ccontrol.cpp
audiotools.cpp: In function ‘void initAVCodec()’:
audiotools.cpp:99:3: error: ‘avcodec_register_all’ was not declared in this scope
   99 |   avcodec_register_all();
      |   ^~~~~~~~~~~~~~~~~~~~
audiotools.cpp:105:31: error: invalid conversion from ‘const AVCodec*’ to ‘AVCodec*’ [-fpermissive]
  105 |   codec = avcodec_find_decoder(AV_CODEC_ID_MP3);
      |           ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
      |                               |
      |                               const AVCodec*