>>> mbuffer 20191016 Extracting
gzip -d -c /home/buildroot/autobuild/instance-1/dl/mbuffer/mbuffer-20191016.tgz | tar --strip-components=1 -C /home/buildroot/autobuild/instance-1/output-1/build/mbuffer-20191016   -xf -
>>> mbuffer 20191016 Patching

Applying 0001-globals.c-properly-get-struct-timespec-definition.patch using patch: 
patching file globals.c
>>> mbuffer 20191016 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/mbuffer-20191016 -name $file); do cp support/gnuconfig/$file $i; done; done
>>> mbuffer 20191016 Patching libtool
>>> mbuffer 20191016 Configuring
(cd /home/buildroot/autobuild/instance-1/output-1/build/mbuffer-20191016/ && 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/arm-linux-ar" AS="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-as" LD="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-ld" NM="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-nm" CC="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc" GCC="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc" CPP="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-cpp" CXX="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-g++" FC="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gfortran" F77="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gfortran" RANLIB="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-ranlib" READELF="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-readelf" STRIP="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-strip" OBJCOPY="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-objcopy" OBJDUMP="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-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/arm-linux-as" DEFAULT_LINKER="/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-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  -O2 -g2 " CXXFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O2 -g2 " LDFLAGS="" FCFLAGS=" -O2 -g2" FFLAGS=" -O2 -g2" PKG_CONFIG="/home/buildroot/autobuild/instance-1/output-1/host/bin/pkg-config" STAGING_DIR="/home/buildroot/autobuild/instance-1/output-1/host/arm-buildroot-linux-uclibcgnueabihf/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  CFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O2 -g2  -std=c99" CONFIG_SITE=/dev/null ./configure --target=arm-buildroot-linux-uclibcgnueabihf --host=arm-buildroot-linux-uclibcgnueabihf --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-debug )
configure: WARNING: unrecognized options: --disable-gtk-doc, --disable-gtk-doc-html, --disable-doc, --disable-docs, --disable-documentation, --with-xmlto, --with-fop, --disable-dependency-tracking, --enable-ipv6, --disable-nls, --disable-static, --enable-shared
checking build system type... x86_64-pc-linux-gnu
checking host system type... arm-buildroot-linux-uclibcgnueabihf
checking target system type... arm-buildroot-linux-uclibcgnueabihf
checking for arm-buildroot-linux-uclibcgnueabihf-gcc... /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc
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 /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc accepts -g... yes
checking for /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc option to accept ISO C89... none needed
checking for /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc option to accept ISO C99... none needed
checking for arm-buildroot-linux-uclibcgnueabihf-cc... (cached) /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc accepts -g... (cached) yes
checking for /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc option to accept ISO C89... (cached) none needed
checking for C/C++ restrict keyword... __restrict
checking for inline... inline
checking whether /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc provides -Wunused-result... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for bash... /bin/bash
checking for rm... /bin/rm
checking for cp... /bin/cp
checking for mt... /bin/mt
checking for gtar... no
checking for tar... /bin/tar
checking for awk... /usr/bin/awk
checking for objdump... /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-objdump
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking how to run the C preprocessor... /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-cpp
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -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 struct stat.st_blksize... yes
checking whether to enable assertions... yes
checking for pthread_mutex_init in -lpthread... no
checking for library containing dlsym... none required
checking for library containing clock_gettime... none required
checking for library containing sem_init... no
configure: error: could not find semaphore functions!
package/pkg-generic.mk:254: recipe for target '/home/buildroot/autobuild/instance-1/output-1/build/mbuffer-20191016/.stamp_configured' failed
make: *** [/home/buildroot/autobuild/instance-1/output-1/build/mbuffer-20191016/.stamp_configured] Error 1
make: Leaving directory '/home/buildroot/autobuild/instance-1/buildroot'