autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/aclocal -I /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/host/share/aclocal -I /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/share/aclocal -I m4 -I . --force -I m4 -I common/m4
autoreconf: configure.ac: tracing
autoreconf: running: /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/libtoolize --force
OpenWrt-libtoolize: putting auxiliary files in `.'.
OpenWrt-libtoolize: linking file `./ltmain.sh'
OpenWrt-libtoolize: putting macros in `m4'.
OpenWrt-libtoolize: linking file `m4/libtool.m4'
OpenWrt-libtoolize: linking file `m4/ltoptions.m4'
OpenWrt-libtoolize: linking file `m4/ltsugar.m4'
OpenWrt-libtoolize: linking file `m4/ltversion.m4'
OpenWrt-libtoolize: linking file `m4/lt~obsolete.m4'
OpenWrt-libtoolize: Remember to add `LT_INIT' to configure.ac.
OpenWrt-libtoolize: Consider adding `AC_CONFIG_MACRO_DIR([m4])' to configure.ac and
OpenWrt-libtoolize: rerunning libtoolize, to keep the correct libtool macros in-tree.
autoreconf: running: /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/autoconf --include=/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/host/share/aclocal --include=/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/share/aclocal --include=m4 --include=. --prepend-include=/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/share/aclocal --force
autoreconf: running: /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/autoheader --include=/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/host/share/aclocal --include=/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/share/aclocal --include=m4 --include=. --prepend-include=/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/share/aclocal --force
autoreconf: running: /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/automake --add-missing --force-missing
autoreconf: Leaving directory `.'
configure: WARNING: unrecognized options: --disable-nls
configure: loading site script /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/include/site/arm
checking build system type... x86_64-pc-linux-gnu
checking host system type... arm-openwrt-linux-gnu
checking target system type... arm-openwrt-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for arm-openwrt-linux-strip... arm-openwrt-linux-muslgnueabi-strip
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether UID '106' is supported by ustar format... yes
checking whether GID '111' is supported by ustar format... yes
checking how to create a ustar tar archive... gnutar
checking nano version... 0 (release)
checking whether to enable maintainer-specific portions of Makefiles... yes
checking whether make supports nested variables... (cached) yes
checking how to print strings... printf
checking for style of include used by make... GNU
checking for arm-openwrt-linux-gcc... ccache_cc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... yes
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether ccache_cc accepts -g... yes
checking for ccache_cc option to accept ISO C89... none needed
checking whether ccache_cc understands -c and -o together... yes
checking dependency style of ccache_cc... gcc3
checking for a sed that does not truncate output... /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/sed
checking for grep that handles long lines and -e... /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/grep
checking for egrep... /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/grep -E
checking for fgrep... /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/host/bin/grep -F
checking for ld used by ccache_cc... arm-openwrt-linux-muslgnueabi-ld
checking if the linker (arm-openwrt-linux-muslgnueabi-ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... arm-openwrt-linux-muslgnueabi-gcc-nm
checking the name lister (arm-openwrt-linux-muslgnueabi-gcc-nm) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking how to convert x86_64-pc-linux-gnu file names to arm-openwrt-linux-gnu format... func_convert_file_noop
checking how to convert x86_64-pc-linux-gnu file names to toolchain format... func_convert_file_noop
checking for arm-openwrt-linux-muslgnueabi-ld option to reload object files... -r
checking for arm-openwrt-linux-objdump... arm-openwrt-linux-muslgnueabi-objdump
checking how to recognize dependent libraries... pass_all
checking for arm-openwrt-linux-dlltool... no
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for arm-openwrt-linux-ar... arm-openwrt-linux-muslgnueabi-gcc-ar
checking for archiver @FILE support... @
checking for arm-openwrt-linux-strip... (cached) arm-openwrt-linux-muslgnueabi-strip
checking for arm-openwrt-linux-ranlib... arm-openwrt-linux-muslgnueabi-gcc-ranlib
checking command to parse arm-openwrt-linux-muslgnueabi-gcc-nm output from ccache_cc object... ok
checking for sysroot... no
checking for arm-openwrt-linux-mt... no
checking for mt... mt
configure: WARNING: using cross tools not prefixed with host triplet
checking if mt is a manifest tool... no
checking how to run the C preprocessor... ccache_cc -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if ccache_cc supports -fno-rtti -fno-exceptions... no
checking for ccache_cc option to produce PIC... -fPIC -DPIC
checking if ccache_cc PIC flag -fPIC -DPIC works... yes
checking if ccache_cc static flag -static works... yes
checking if ccache_cc supports -c -o file.o... yes
checking if ccache_cc supports -c -o file.o... (cached) yes
checking whether the ccache_cc linker (arm-openwrt-linux-muslgnueabi-ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking for shl_load... no
checking for shl_load in -ldld... no
checking for dlopen... yes
checking whether a program can dlopen itself... cross
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
checking pkg-config is at least version 0.9.0... yes
checking for orc-0.4 >= 0.4.16... no
configure: Using GStreamer libav source release as package name
configure: Using Unknown package origin as package origin
checking whether byte ordering is bigendian... (cached) no
checking for arm-openwrt-linux-gcc... (cached) ccache_cc
checking whether we are using the GNU C compiler... (cached) yes
checking whether ccache_cc accepts -g... (cached) yes
checking for ccache_cc option to accept ISO C89... (cached) none needed
checking whether ccache_cc understands -c and -o together... (cached) yes
checking dependency style of ccache_cc... (cached) gcc3
checking for ccache_cc option to accept ISO C99... none needed
checking for ccache_cc option to accept ISO Standard C... (cached) none needed
checking for valgrind... no
checking for gtkdoc-check... no
checking for gtkdoc-rebase... no
checking for gtkdoc-mkpdf... no
checking whether to build gtk-doc documentation... no
checking for python... /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/host/bin/python
checking for python version... 2.7
checking for python platform... linux2
checking for python script directory... ${prefix}/lib/python2.7/site-packages
checking for python extension module directory... ${exec_prefix}/lib/python2.7/site-packages
checking whether to build plugin documentation... no (gtk-doc disabled or not available)
checking for cos in -lm... yes
checking for ANSI C header files... (cached) yes
checking for glib-2.0 >= 2.40.0 gobject-2.0 gmodule-no-export-2.0... yes
checking for glib-genmarshal... glib-genmarshal (from pkg-config path)
checking for glib-mkenums... glib-mkenums
checking for gio-2.0 >= 2.40.0... yes
checking for gstreamer-1.0 >= 1.8.0... yes
configure: using GStreamer tools in /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/bin
configure: using GStreamer plug-ins in /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/lib/gstreamer-1.0
checking for gstreamer-base-1.0 >= 1.8.0... yes
checking for gstreamer-plugins-base-1.0 >= 1.8.0... yes
configure: using GStreamer Base Plugins in /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/lib/gstreamer-1.0
checking for gstreamer-check-1.0 >= 1.8.0... yes
configure: Using GStreamer Core Plugins in /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/lib/gstreamer-1.0
configure: Using GStreamer Base Plugins in /build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/staging_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/usr/lib/gstreamer-1.0
checking for -Bsymbolic-functions linker flag... yes
configure: Using /usr/lib/gstreamer-1.0 as the plugin install location
checking whether to build static plugins or not... no
checking to see if compiler understands -Wall... yes
checking to see if compiler understands -Wdeclaration-after-statement... yes
checking to see if compiler understands -Wvla... yes
checking to see if compiler understands -Wpointer-arith... yes
checking to see if compiler understands -Wmissing-declarations... yes
checking to see if compiler understands -Wmissing-prototypes... yes
checking to see if compiler understands -Wredundant-decls... yes
checking to see if compiler understands -Wundef... yes
checking to see if compiler understands -Wwrite-strings... yes
checking to see if compiler understands -Wformat-nonliteral... yes
checking to see if compiler understands -Wformat-security... yes
checking to see if compiler understands -Wold-style-definition... yes
checking to see if compiler understands -Winit-self... yes
checking to see if compiler understands -Wmissing-include-dirs... yes
checking to see if compiler understands -Waddress... yes
checking to see if compiler understands -Waggregate-return... yes
checking to see if compiler understands -Wno-multichar... yes
checking to see if compiler understands -Wnested-externs... yes
configure: set WARNING_CFLAGS to  -Wall -Wdeclaration-after-statement -Wvla -Wpointer-arith -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -Wundef -Wwrite-strings -Wformat-nonliteral -Wformat-security -Wold-style-definition -Winit-self -Wmissing-include-dirs -Waddress -Waggregate-return -Wno-multichar -Wnested-externs
configure: set ERROR_CFLAGS to 
checking for BZ2_bzlibVersion in -lbz2... yes
checking for lzma_version_string in -llzma... yes
configure: Using local Libav snapshot
configure: Using included Libav code
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating common/Makefile
config.status: creating common/m4/Makefile
config.status: creating gst-libav.spec
config.status: creating ext/Makefile
config.status: creating ext/libav/Makefile
config.status: creating ext/libswscale/Makefile
config.status: creating gst-libs/Makefile
config.status: creating gst-libs/ext/Makefile
config.status: creating docs/Makefile
config.status: creating docs/plugins/Makefile
config.status: creating docs/version.entities
config.status: creating tests/Makefile
config.status: creating tests/check/Makefile
config.status: creating tests/files/Makefile
config.status: creating pkgconfig/Makefile
config.status: creating pkgconfig/gstreamer-plugins-libav-uninstalled.pc
config.status: creating config.h
config.status: config.h is unchanged
config.status: executing depfiles commands
config.status: executing libtool commands
config.status: executing configure-embedded-libav commands
Configuring included Libav instance with args --prefix=/usr         --enable-static --enable-pic         --disable-avdevice --disable-postproc         --disable-programs --disable-ffserver --disable-ffplay --disable-ffprobe --disable-ffmpeg         --disable-encoder=flac --disable-protocols --disable-devices         --disable-network --disable-hwaccels --disable-dxva2 --disable-vdpau         --disable-filters --enable-filter=yadif --disable-doc --disable-vda --disable-d3d11va --disable-dxva2         --disable-iconv --enable-optimizations --enable-cross-compile         --target-os=linux --arch=arm --cross-prefix=arm-openwrt-linux- --ar="$AR" --as="$CC" --cc="$CC" --ld="$CC" --nm="$NM" --disable-ffmpeg --target-os=linux --cpu=cortex-a53+neon-vfpv4 --disable-bsfs --disable-programs --disable-devices --disable-encoders                               --disable-decoders  --enable-decoder='aac'   --enable-decoder='ac3'   --enable-decoder='atrac3'      --enable-decoder='h264'   --enable-decoder='jpegls'      --enable-decoder='mp3'   --enable-decoder='mpeg1video'   --enable-decoder='mpeg2video'   --enable-decoder='mpeg4'   --enable-decoder='mpegvideo'   --enable-decoder='pcm_s16be'   --enable-decoder='pcm_s16le'   --enable-decoder='png'   --enable-decoder='vorbis'   --enable-decoder='wmav1'   --enable-decoder='wmav2'   --enable-decoder='zlib'  --disable-muxers                                  --disable-demuxers  --enable-demuxer='ac3'      --enable-demuxer='h264'   --enable-demuxer='mp3'         --enable-demuxer='mpegvideo'   --enable-demuxer='ogg'              --disable-parsers  --enable-parser='aac'   --enable-parser='ac3'   --enable-parser='h264'   --enable-parser='mpegaudio'   --enable-parser='mpegvideo'   --enable-parser='mpeg4video'  --disable-protocols                   --disable-asm --disable-altivec --disable-amd3dnow --disable-amd3dnowext --disable-mmx --disable-mmxext --disable-sse --disable-sse2 --disable-sse3 --disable-ssse3 --disable-sse4 --disable-sse42 --disable-avx --disable-xop --disable-fma3 --disable-fma4 --disable-avx2 --disable-inline-asm --disable-yasm
ccache_cc is unable to create an executable file.
C compiler test failed.

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solve the problem.
config.status: error: Failed to configure embedded Libav tree
Makefile:198: recipe for target '/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/build_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/gst-libav-1.8.2/.configured_4427a835cb85393b25bc1191a3fd0f66' failed
make[3]: *** [/build/lede-17.01/slaves/phase2/arm_cortex-a53_neon-vfpv4/build/sdk/build_dir/target-arm_cortex-a53+neon-vfpv4_musl-1.1.16_eabi/gst-libav-1.8.2/.configured_4427a835cb85393b25bc1191a3fd0f66] Error 1