FAILED: /usr/bin/x86_64-linux-gnu-gcc -MMD -MF obj/third_party/ffmpeg/ffmpeg_internal/autorename_libavutil_cpu.o.d -DHAVE_AV_CONFIG_H -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -DFF_API_CONVERGENCE_DURATION=0 -D_ISOC99_SOURCE -D_LARGEFILE_SOURCE -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUI_COMPOSITOR_IMAGE_TRANSPORT -DUSE_AURA=1 -DUSE_PANGO=1 -DUSE_NSS_CERTS=1 -DUSE_OZONE=1 -DNO_TCMALLOC -DUSE_EXTERNAL_POPUP_MENU=1 -DDISABLE_NACL -DUSE_PROPRIETARY_CODECS -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DENABLE_MEDIA_ROUTER=1 -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -I../../third_party/ffmpeg/chromium/config/Chrome/linux/x64 -I../../third_party/ffmpeg -I../.. -Igen -I../../third_party/opus/src/include -fPIC -fomit-frame-pointer -Wno-deprecated-declarations -w -std=c99 -pthread -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -fomit-frame-pointer -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -funwind-tables -fPIC -pipe -m64 -march=x86-64 -pthread -g1 -Wno-unused-local-typedefs -Wno-maybe-uninitialized -Wno-missing-field-initializers -Wno-unused-parameter -O2 -fno-ident -fdata-sections -ffunction-sections -fvisibility=default -c ../../third_party/ffmpeg/libavutil/autorename_libavutil_cpu.c -o obj/third_party/ffmpeg/ffmpeg_internal/autorename_libavutil_cpu.o
In file included from ../../third_party/ffmpeg/libavutil/autorename_libavutil_cpu.c:2:0:
../../third_party/ffmpeg/libavutil/cpu.c:24:23: fatal error: stdatomic.h: No such file or directory
#include <stdatomic.h>
^
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