>>> micropython 1.9.4 Extracting
gzip -d -c /home/buildroot/autobuild/run/instance-1/dl/micropython/micropython-1.9.4.tar.gz | tar --strip-components=1 -C /home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4   -xf -
>>> micropython 1.9.4 Patching

Applying 0001-fix-version.patch using patch: 
patching file py/makeversionhdr.py
>>> micropython 1.9.4 Configuring
>>> micropython 1.9.4 Building
PATH="/home/buildroot/autobuild/run/instance-1/output/host/bin:/home/buildroot/autobuild/run/instance-1/output/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" /usr/bin/make -j4 -C /home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4/mpy-cross
Use make V=1 or set BUILD_VERBOSE in your environment to increase build verbosity.
make[1]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4/mpy-cross'
mkdir -p build/genhdr
mkdir -p build/extmod
mkdir -p build/lib/embed
mkdir -p build/lib/utils
mkdir -p build/py
GEN build/genhdr/mpversion.h
GEN build/genhdr/qstr.i.last
GEN build/genhdr/qstr.split
GEN build/genhdr/qstrdefs.collected.h
QSTR updated
GEN build/genhdr/qstrdefs.generated.h
CC ../py/mpstate.c
CC ../py/nlr.c
CC ../py/nlrx86.c
CC ../py/nlrx64.c
CC ../py/nlrthumb.c
CC ../py/nlrxtensa.c
CC ../py/nlrsetjmp.c
CC ../py/malloc.c
CC ../py/gc.c
CC ../py/pystack.c
CC ../py/qstr.c
CC ../py/vstr.c
CC ../py/mpprint.c
CC ../py/unicode.c
CC ../py/mpz.c
CC ../py/reader.c
CC ../py/lexer.c
CC ../py/parse.c
CC ../py/scope.c
CC ../py/compile.c
CC ../py/emitcommon.c
CC ../py/emitbc.c
CC ../py/asmbase.c
CC ../py/asmx64.c
CC ../py/emitnx64.c
CC ../py/asmx86.c
CC ../py/emitnx86.c
CC ../py/asmthumb.c
CC ../py/emitnthumb.c
CC ../py/emitinlinethumb.c
CC ../py/asmarm.c
CC ../py/emitnarm.c
CC ../py/asmxtensa.c
CC ../py/emitnxtensa.c
CC ../py/emitinlinextensa.c
CC ../py/formatfloat.c
CC ../py/parsenumbase.c
CC ../py/parsenum.c
CC ../py/emitglue.c
CC ../py/persistentcode.c
CC ../py/runtime.c
CC ../py/runtime_utils.c
CC ../py/scheduler.c
CC ../py/nativeglue.c
CC ../py/stackctrl.c
CC ../py/argcheck.c
CC ../py/warning.c
CC ../py/map.c
CC ../py/obj.c
CC ../py/objarray.c
CC ../py/objattrtuple.c
CC ../py/objbool.c
CC ../py/objboundmeth.c
CC ../py/objcell.c
CC ../py/objclosure.c
CC ../py/objcomplex.c
CC ../py/objdeque.c
CC ../py/objdict.c
CC ../py/objenumerate.c
CC ../py/objexcept.c
CC ../py/objfilter.c
CC ../py/objfloat.c
CC ../py/objfun.c
CC ../py/objgenerator.c
CC ../py/objgetitemiter.c
CC ../py/objint.c
CC ../py/objint_longlong.c
CC ../py/objint_mpz.c
CC ../py/objlist.c
CC ../py/objmap.c
CC ../py/objmodule.c
CC ../py/objobject.c
CC ../py/objpolyiter.c
CC ../py/objproperty.c
CC ../py/objnone.c
CC ../py/objnamedtuple.c
CC ../py/objrange.c
CC ../py/objreversed.c
CC ../py/objset.c
CC ../py/objsingleton.c
CC ../py/objslice.c
CC ../py/objstr.c
CC ../py/objstrunicode.c
CC ../py/objstringio.c
CC ../py/objtuple.c
CC ../py/objtype.c
CC ../py/objzip.c
CC ../py/opmethods.c
CC ../py/sequence.c
CC ../py/stream.c
CC ../py/binary.c
CC ../py/builtinimport.c
CC ../py/builtinevex.c
CC ../py/builtinhelp.c
CC ../py/modarray.c
CC ../py/modbuiltins.c
CC ../py/modcollections.c
CC ../py/modgc.c
CC ../py/modio.c
CC ../py/modmath.c
CC ../py/modcmath.c
CC ../py/modmicropython.c
CC ../py/modstruct.c
CC ../py/modsys.c
CC ../py/moduerrno.c
CC ../py/modthread.c
CC ../py/vm.c
CC ../py/bc.c
CC ../py/showbc.c
CC ../py/repl.c
CC ../py/smallint.c
CC ../py/frozenmod.c
CC ../extmod/moductypes.c
CC ../extmod/modujson.c
CC ../extmod/modure.c
CC ../extmod/moduzlib.c
CC ../extmod/moduheapq.c
CC ../extmod/modutimeq.c
CC ../extmod/moduhashlib.c
CC ../extmod/modubinascii.c
CC ../extmod/virtpin.c
CC ../extmod/machine_mem.c
CC ../extmod/machine_pinbase.c
CC ../extmod/machine_signal.c
CC ../extmod/machine_pulse.c
CC ../extmod/machine_i2c.c
CC ../extmod/machine_spi.c
CC ../extmod/modussl_axtls.c
CC ../extmod/modussl_mbedtls.c
CC ../extmod/modurandom.c
CC ../extmod/moduselect.c
CC ../extmod/modwebsocket.c
CC ../extmod/modwebrepl.c
CC ../extmod/modframebuf.c
CC ../extmod/vfs.c
CC ../extmod/vfs_reader.c
CC ../extmod/vfs_fat.c
CC ../extmod/vfs_fat_diskio.c
CC ../extmod/vfs_fat_file.c
CC ../extmod/utime_mphal.c
CC ../extmod/uos_dupterm.c
CC ../lib/embed/abort_.c
CC ../lib/utils/printf.c
CC main.c
CC gccollect.c
LINK mpy-cross
   text	   data	    bss	    dec	    hex	filename
 131198	    808	    864	 132870	  20706	mpy-cross
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4/mpy-cross'
PATH="/home/buildroot/autobuild/run/instance-1/output/host/bin:/home/buildroot/autobuild/run/instance-1/output/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" /usr/bin/make -j4 -C /home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4/ports/unix MICROPY_PY_BTREE=0 MICROPY_PY_USSL=0 CROSS_COMPILE=/home/buildroot/autobuild/run/instance-1/output/host/bin/arm-buildroot-linux-gnueabihf- CFLAGS_EXTRA=
Use make V=1 or set BUILD_VERBOSE in your environment to increase build verbosity.
make[1]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4/ports/unix'
mkdir -p build/genhdr
mkdir -p build/build
mkdir -p build/extmod
mkdir -p build/lib/embed
mkdir -p build/lib/mp-readline
mkdir -p build/lib/oofatfs
mkdir -p build/lib/oofatfs/option
mkdir -p build/lib/timeutils
mkdir -p build/lib/utils
mkdir -p build/py
MPY modules/upip_utarfile.py
GEN build/frozen.c
MPY modules/upip.py
GEN build/genhdr/mpversion.h
GEN build/genhdr/qstr.i.last
GEN build/genhdr/qstr.split
GEN build/genhdr/qstrdefs.collected.h
QSTR updated
GEN build/genhdr/qstrdefs.generated.h
CC ../../py/mpstate.c
CC ../../py/nlr.c
CC ../../py/nlrx86.c
CC ../../py/nlrx64.c
CC ../../py/nlrthumb.c
CC ../../py/nlrxtensa.c
CC ../../py/nlrsetjmp.c
CC ../../py/malloc.c
CC ../../py/gc.c
CC ../../py/pystack.c
CC ../../py/qstr.c
CC ../../py/vstr.c
CC ../../py/mpprint.c
CC ../../py/unicode.c
CC ../../py/mpz.c
CC ../../py/reader.c
CC ../../py/lexer.c
CC ../../py/parse.c
CC ../../py/scope.c
CC ../../py/compile.c
CC ../../py/emitcommon.c
CC ../../py/emitbc.c
CC ../../py/asmbase.c
CC ../../py/asmx64.c
CC ../../py/emitnx64.c
CC ../../py/asmx86.c
CC ../../py/emitnx86.c
CC ../../py/asmthumb.c
CC ../../py/emitnthumb.c
CC ../../py/emitinlinethumb.c
CC ../../py/asmarm.c
CC ../../py/emitnarm.c
CC ../../py/asmxtensa.c
CC ../../py/emitnxtensa.c
CC ../../py/emitinlinextensa.c
CC ../../py/formatfloat.c
CC ../../py/parsenumbase.c
CC ../../py/parsenum.c
CC ../../py/emitglue.c
CC ../../py/persistentcode.c
CC ../../py/runtime.c
CC ../../py/runtime_utils.c
CC ../../py/scheduler.c
CC ../../py/nativeglue.c
CC ../../py/stackctrl.c
CC ../../py/argcheck.c
CC ../../py/warning.c
CC ../../py/map.c
CC ../../py/obj.c
CC ../../py/objarray.c
CC ../../py/objattrtuple.c
CC ../../py/objbool.c
CC ../../py/objboundmeth.c
CC ../../py/objcell.c
CC ../../py/objclosure.c
CC ../../py/objcomplex.c
CC ../../py/objdeque.c
CC ../../py/objdict.c
CC ../../py/objenumerate.c
CC ../../py/objexcept.c
CC ../../py/objfilter.c
CC ../../py/objfloat.c
CC ../../py/objfun.c
CC ../../py/objgenerator.c
CC ../../py/objgetitemiter.c
CC ../../py/objint.c
CC ../../py/objint_longlong.c
CC ../../py/objint_mpz.c
CC ../../py/objlist.c
CC ../../py/objmap.c
CC ../../py/objmodule.c
CC ../../py/objobject.c
CC ../../py/objpolyiter.c
CC ../../py/objproperty.c
CC ../../py/objnone.c
CC ../../py/objnamedtuple.c
CC ../../py/objrange.c
CC ../../py/objreversed.c
CC ../../py/objset.c
CC ../../py/objsingleton.c
CC ../../py/objslice.c
CC ../../py/objstr.c
CC ../../py/objstrunicode.c
CC ../../py/objstringio.c
CC ../../py/objtuple.c
CC ../../py/objtype.c
CC ../../py/objzip.c
CC ../../py/opmethods.c
CC ../../py/sequence.c
CC ../../py/stream.c
CC ../../py/binary.c
CC ../../py/builtinimport.c
CC ../../py/builtinevex.c
CC ../../py/builtinhelp.c
CC ../../py/modarray.c
CC ../../py/modbuiltins.c
CC ../../py/modcollections.c
CC ../../py/modgc.c
CC ../../py/modio.c
CC ../../py/modmath.c
CC ../../py/modcmath.c
CC ../../py/modmicropython.c
CC ../../py/modstruct.c
CC ../../py/modsys.c
CC ../../py/moduerrno.c
CC ../../py/modthread.c
CC ../../py/vm.c
CC ../../py/bc.c
CC ../../py/showbc.c
CC ../../py/repl.c
CC ../../py/smallint.c
CC ../../py/frozenmod.c
CC ../../extmod/moductypes.c
CC ../../extmod/modujson.c
CC ../../extmod/modure.c
CC ../../extmod/moduzlib.c
CC ../../extmod/moduheapq.c
CC ../../extmod/modutimeq.c
CC ../../extmod/moduhashlib.c
CC ../../extmod/modubinascii.c
CC ../../extmod/virtpin.c
CC ../../extmod/machine_mem.c
CC ../../extmod/machine_pinbase.c
CC ../../extmod/machine_signal.c
CC ../../extmod/machine_pulse.c
CC ../../extmod/machine_i2c.c
CC ../../extmod/machine_spi.c
CC ../../extmod/modussl_axtls.c
CC ../../extmod/modussl_mbedtls.c
CC ../../extmod/modurandom.c
CC ../../extmod/moduselect.c
CC ../../extmod/modwebsocket.c
CC ../../extmod/modwebrepl.c
CC ../../extmod/modframebuf.c
CC ../../extmod/vfs.c
CC ../../extmod/vfs_reader.c
CC ../../extmod/vfs_fat.c
CC ../../extmod/vfs_fat_diskio.c
CC ../../extmod/vfs_fat_file.c
CC ../../extmod/utime_mphal.c
CC ../../extmod/uos_dupterm.c
CC ../../lib/embed/abort_.c
CC ../../lib/utils/printf.c
CC build/frozen.c
../../lib/utils/printf.c:109:5: error: '__GI_vsnprintf' specifies less restrictive attributes than its target 'vsnprintf': 'nonnull', 'nothrow' [-Werror=missing-attributes]
  109 | int __GI_vsnprintf(char *str, size_t size, const char *fmt, va_list ap) __attribute__((weak, alias ("vsnprintf")));
      |     ^~~~~~~~~~~~~~
In file included from ./mpconfigport.h:323,
                 from ../../py/mpconfig.h:45,
                 from ../../lib/utils/printf.c:27:
/home/buildroot/autobuild/run/instance-1/output/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/stdio.h:358:12: note: '__GI_vsnprintf' target declared here
  358 | extern int vsnprintf (char *__restrict __s, size_t __maxlen,
      |            ^~~~~~~~~
cc1: all warnings being treated as errors
make[1]: *** [build/lib/utils/printf.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4/ports/unix'
make: *** [/home/buildroot/autobuild/run/instance-1/output/build/micropython-1.9.4/.stamp_built] Error 2
make: Leaving directory `/home/buildroot/autobuild/run/instance-1/buildroot'