[FFmpeg-trac] #6648(undetermined:new): Compile error with glibc 2.26

[FFmpeg]

#6648: Compile error with glibc 2.26
-------------------------------------+-------------------------------------
             Reporter:  bermond      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  glibc        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Compiling with the newly released gblic 2.26 gives me the following error:
 {{{
 CC      libavfilter/vf_sab.o
 CC      libavfilter/vf_scale.o
 CC      libavfilter/vf_scale_cuda.o
 NVCC    libavfilter/vf_scale_cuda.ptx
 CC      libavfilter/vf_scale_npp.o
 /usr/include/bits/floatn.h(61): error: invalid argument to attribute
 "__mode__"

 /usr/include/bits/floatn.h(73): error: identifier "__float128" is
 undefined

 CC      libavfilter/vf_scale_qsv.o
 CC      libavfilter/vf_scale_vaapi.o
 2 errors detected in the compilation of
 "/tmp/tmpxft_000034b7_00000000-7_vf_scale_cuda.cpp1.ii".
 make: *** [ffbuild/common.mak:95: libavfilter/vf_scale_cuda.ptx] Error 2
 make: *** Waiting for unfinished jobs....
 libavfilter/vf_paletteuse.c: In function ‘load_apply_palette’:
 libavfilter/vf_paletteuse.c:970:14: warning: ‘main’ is usually a function
 [-Wmain]
      AVFrame *main, *second, *out;
               ^~~~
 }}}

 How to reproduce:
 {{{
 $ ./configure \
         --prefix='/usr' \
         --extra-cflags='-I/opt/cuda/include' \
         --extra-ldflags='-L/opt/cuda/lib64 -Wl,-rpath
 -Wl,/opt/intel/mediasdk/lib64' \
         \
         --cpu='native' \
         \
         --enable-rpath \
         --enable-gpl \
         --enable-version3 \
         --enable-nonfree \
         --enable-shared \
         --disable-static \
         --enable-gray \
         --enable-avresample \
         \
         --enable-alsa \
         --enable-avisynth \
         --enable-bzlib \
         --enable-chromaprint \
         --enable-frei0r \
         --enable-gcrypt \
         --enable-gmp \
         --enable-gnutls \
         --enable-iconv \
         --enable-jack \
         --enable-ladspa \
         --enable-libass \
         --enable-libbluray \
         --enable-libbs2b \
         --enable-libcaca \
         --enable-libcelt \
         --enable-libcdio \
         --enable-libdc1394 \
         --enable-libfdk-aac \
         --enable-libflite \
         --enable-fontconfig \
         --enable-libfreetype \
         --enable-libfribidi \
         --enable-libgme \
         --enable-libgsm \
         --enable-libiec61883 \
         --enable-libilbc \
         --enable-libkvazaar \
         --enable-libmodplug \
         --enable-libmp3lame \
         --enable-libopencore-amrnb \
         --enable-libopencore-amrwb \
         --enable-libopencv \
         --enable-libopenh264 \
         --enable-libopenjpeg \
         --enable-libopenmpt \
         --enable-libopus \
         --enable-libpulse \
         --enable-librsvg \
         --enable-librubberband \
         --enable-librtmp  \
         --enable-libshine \
         --enable-libsmbclient \
         --enable-libsnappy \
         --enable-libsoxr \
         --enable-libspeex \
         --enable-libssh \
         --enable-libtesseract \
         --enable-libtheora \
         --enable-libtwolame \
         --enable-libv4l2 \
         --enable-libvidstab \
         --enable-libvmaf \
         --enable-libvo-amrwbenc \
         --enable-libvorbis \
         --enable-libvpx \
         --enable-libwavpack \
         --enable-libwebp \
         --enable-libx264 \
         --enable-libx265 \
         --enable-libxavs \
         --enable-libxcb \
         --enable-libxcb-shm \
         --enable-libxcb-xfixes \
         --enable-libxcb-shape \
         --enable-libxvid \
         --enable-libzimg \
         --enable-libzmq \
         --enable-libzvbi \
         --enable-lzma \
         --enable-decklink \
         --enable-libndi_newtek \
         --enable-libmysofa \
         --enable-openal \
         --enable-opencl \
         --enable-opengl \
         --enable-openssl \
         --enable-sndio \
         --enable-sdl2 \
         --enable-xlib \
         --enable-zlib \
         \
         --enable-cuda \
         --enable-cuda-sdk \
         --enable-cuvid \
         --enable-libmfx \
         --enable-libnpp \
         --enable-nvenc \
         --enable-omx \
         --enable-omx-rpi \
         --enable-vaapi \
         --enable-vdpau
 $ make -j6
 }}}

 When downgrading glibc to 2.25 it compiles fine.

 '''System information:'''
 '''OS:''' Arch Linux x86_64
 '''FFmpeg:''' git master (currently at N-87251: 3.4.r87251.ga918f16f7c)
 '''Compiler:''' gcc 7.2.0
 '''glibc:''' 2.26
 '''CUDA:''' 8.0.61

 Relevant system-wide environmet variables:
 '''CPPFLAGS='''"-D_FORTIFY_SOURCE=2"
 '''CFLAGS='''"-march=native -O2 -pipe -fstack-protector-strong -fno-plt"
 '''CXXFLAGS='''"-march=native -O2 -pipe -fstack-protector-strong -fno-plt"
 '''LDFLAGS='''"-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now"

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6648>
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