>>> libsndfile 1.0.28 Downloading
--2019-09-21 16:42:57--  http://www.mega-nerd.com/libsndfile/files/libsndfile-1.0.28.tar.gz
Resolving www.mega-nerd.com (www.mega-nerd.com)... 97.107.128.207
Connecting to www.mega-nerd.com (www.mega-nerd.com)|97.107.128.207|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1202833 (1.1M) [application/x-gzip]
Saving to: '/home/buildroot/autobuild/instance-1/output-1/build/.libsndfile-1.0.28.tar.gz.eQy33j/output'

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2019-09-21 16:42:58 (1.28 MB/s) - '/home/buildroot/autobuild/instance-1/output-1/build/.libsndfile-1.0.28.tar.gz.eQy33j/output' saved [1202833/1202833]

libsndfile-1.0.28.tar.gz: OK (sha256: 1ff33929f042fa333aed1e8923aa628c3ee9e1eb85512686c55092d1e5a9dfa9)
>>> libsndfile 1.0.28 Extracting
gzip -d -c /home/buildroot/autobuild/instance-1/dl/libsndfile/libsndfile-1.0.28.tar.gz | tar --strip-components=1 -C /home/buildroot/autobuild/instance-1/output-1/build/libsndfile-1.0.28   -xf -
>>> libsndfile 1.0.28 Patching

Applying 0001-double64_init-Check-psf-sf.channels-against-upper-bo.patch using patch: 
patching file src/double64.c

Applying 0002-Check-MAX_CHANNELS-in-sndfile-deinterleave.patch using patch: 
patching file programs/sndfile-deinterleave.c

Applying 0003-a-ulaw-fix-multiple-buffer-overflows-432.patch using patch: 
patching file src/alaw.c
patching file src/ulaw.c
>>> libsndfile 1.0.28 Updating config.sub and config.guess
for file in config.guess config.sub; do for i in $(find /home/buildroot/autobuild/instance-1/output-1/build/libsndfile-1.0.28 -name $file); do cp support/gnuconfig/$file $i; done; done
>>> libsndfile 1.0.28 Patching libtool
patching file /home/buildroot/autobuild/instance-1/output-1/build/libsndfile-1.0.28/Cfg/ltmain.sh
Hunk #1 succeeded at 2694 (offset 7 lines).
Hunk #2 succeeded at 4284 (offset 7 lines).
Hunk #3 succeeded at 6579 (offset 25 lines).
Hunk #4 succeeded at 6589 (offset 25 lines).
Hunk #5 succeeded at 6882 (offset 25 lines).
Hunk #6 succeeded at 7174 (offset 25 lines).
Hunk #7 succeeded at 8146 (offset 34 lines).
Hunk #8 succeeded at 10778 (offset 68 lines).
>>> libsndfile 1.0.28 Configuring
(cd /home/buildroot/autobuild/instance-1/output-1/build/libsndfile-1.0.28/ && rm -rf config.cache && PATH="/home/buildroot/autobuild/instance-1/output-1/host/bin:/home/buildroot/autobuild/instance-1/output-1/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" AR="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-ar" AS="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-as" LD="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-ld" NM="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-nm" CC="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-gcc" GCC="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-gcc" CPP="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-cpp" CXX="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-g++" FC="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-gfortran" F77="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-gfortran" RANLIB="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-ranlib" READELF="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-readelf" STRIP="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-strip" OBJCOPY="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-objcopy" OBJDUMP="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-objdump" AR_FOR_BUILD="/usr/bin/ar" AS_FOR_BUILD="/usr/bin/as" CC_FOR_BUILD="/usr/bin/gcc" GCC_FOR_BUILD="/usr/bin/gcc" CXX_FOR_BUILD="/usr/bin/g++" LD_FOR_BUILD="/usr/bin/ld" CPPFLAGS_FOR_BUILD="-I/home/buildroot/autobuild/instance-1/output-1/host/include" CFLAGS_FOR_BUILD="-O2 -I/home/buildroot/autobuild/instance-1/output-1/host/include" CXXFLAGS_FOR_BUILD="-O2 -I/home/buildroot/autobuild/instance-1/output-1/host/include" LDFLAGS_FOR_BUILD="-L/home/buildroot/autobuild/instance-1/output-1/host/lib -Wl,-rpath,/home/buildroot/autobuild/instance-1/output-1/host/lib" FCFLAGS_FOR_BUILD="" DEFAULT_ASSEMBLER="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-as" DEFAULT_LINKER="/home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-ld" CPPFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64" CFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  " CXXFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  " LDFLAGS="" FCFLAGS=" -Os " FFLAGS=" -Os " PKG_CONFIG="/home/buildroot/autobuild/instance-1/output-1/host/bin/pkg-config" STAGING_DIR="/home/buildroot/autobuild/instance-1/output-1/host/riscv32-buildroot-linux-gnu/sysroot" INTLTOOL_PERL=/usr/bin/perl ac_cv_lbl_unaligned_fail=yes ac_cv_func_mmap_fixed_mapped=yes ac_cv_func_memcmp_working=yes ac_cv_have_decl_malloc=yes gl_cv_func_malloc_0_nonnull=yes ac_cv_func_malloc_0_nonnull=yes ac_cv_func_calloc_0_nonnull=yes ac_cv_func_realloc_0_nonnull=yes lt_cv_sys_lib_search_path_spec="" ac_cv_c_bigendian=no   CONFIG_SITE=/dev/null ./configure --target=riscv32-buildroot-linux-gnu --host=riscv32-buildroot-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --localstatedir=/var --program-prefix="" --disable-gtk-doc --disable-gtk-doc-html --disable-doc --disable-docs --disable-documentation --with-xmlto=no --with-fop=no --disable-dependency-tracking --enable-ipv6 --disable-nls --disable-static --enable-shared  --disable-sqlite --disable-alsa --disable-external-libs --disable-full-suite )
configure: WARNING: unrecognized options: --disable-gtk-doc, --disable-gtk-doc-html, --disable-doc, --disable-docs, --disable-documentation, --with-xmlto, --with-fop, --enable-ipv6, --disable-nls
checking build system type... x86_64-pc-linux-gnu
checking host system type... riscv32-buildroot-linux-gnu
checking target system type... riscv32-buildroot-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for riscv32-buildroot-linux-gnu-strip... /home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-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 make supports nested variables... (cached) yes
checking for style of include used by make... GNU
checking for riscv32-buildroot-linux-gnu-gcc... /home/buildroot/autobuild/instance-1/output-1/host/bin/riscv32-linux-gcc
checking whether the C compiler works... no
configure: error: in `/home/buildroot/autobuild/instance-1/output-1/build/libsndfile-1.0.28':
configure: error: C compiler cannot create executables
See `config.log' for more details
package/pkg-generic.mk:228: recipe for target '/home/buildroot/autobuild/instance-1/output-1/build/libsndfile-1.0.28/.stamp_configured' failed
make: *** [/home/buildroot/autobuild/instance-1/output-1/build/libsndfile-1.0.28/.stamp_configured] Error 77
make: Leaving directory '/home/buildroot/autobuild/instance-1/buildroot'