dpkg-buildpackage: info: source package flatline
dpkg-buildpackage: info: source version 7
dpkg-buildpackage: info: source distribution stable
dpkg-buildpackage: info: source changed by Wessel Dankers <wsl@uvt.nl>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
dpkg-source: info: using options from flatline-7/debian/source/options: --compression=xz --compression-level=best
 fakeroot debian/rules clean
exec dh clean
dh: warning: Compatibility levels before 10 are deprecated (level 9 in use)
   dh_clean
dh_clean: warning: Compatibility levels before 10 are deprecated (level 9 in use)
 dpkg-source -b .
dpkg-source: info: using options from flatline-7/debian/source/options: --compression=xz --compression-level=best
dpkg-source: info: using source format '3.0 (native)'
dpkg-source: info: building flatline in flatline_7.tar.xz
dpkg-source: info: building flatline in flatline_7.dsc
 debian/rules build
exec dh build
dh: warning: Compatibility levels before 10 are deprecated (level 9 in use)
   dh_update_autotools_config
   dh_auto_configure
dh_auto_configure: warning: Compatibility levels before 10 are deprecated (level 9 in use)
	./configure --build=x86_64-linux-gnu --prefix=/usr --includedir=\${prefix}/include --mandir=\${prefix}/share/man --infodir=\${prefix}/share/info --sysconfdir=/etc --localstatedir=/var --disable-option-checking --disable-silent-rules --libdir=\${prefix}/lib/x86_64-linux-gnu --libexecdir=\${prefix}/lib/x86_64-linux-gnu --disable-maintainer-mode --disable-dependency-tracking
checking for a BSD-compatible install... /usr/bin/install -c
checking whether sleep supports fractional seconds... yes
checking filesystem timestamp resolution... 0.01
checking whether build environment is sane... yes
checking for a race-free mkdir -p... /bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking xargs -n works... yes
checking for gcc... 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... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether gcc accepts -g... yes
checking for gcc option to enable C11 features... unsupported
checking for gcc option to enable C99 features... none needed
checking whether gcc understands -c and -o together... yes
checking whether make supports the include directive... yes (GNU style)
checking dependency style of gcc... none
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking how to print strings... printf
checking for a sed that does not truncate output... /bin/sed
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for fgrep... /bin/grep -F
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking how to convert x86_64-pc-linux-gnu file names to x86_64-pc-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 /usr/bin/ld option to reload object files... -r
checking for file... file
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ranlib... ranlib
checking for ar... ar
checking for archiver @FILE support... @
checking for strip... strip
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for sysroot... no
checking for a working dd... /bin/dd
checking how to truncate binary pipes... /bin/dd bs=4096 count=1
checking for mt... no
checking if : is a manifest tool... no
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC -DPIC
checking if gcc PIC flag -fPIC -DPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) 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 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... yes
checking for inttypes.h... (cached) yes
checking for stdbool.h... yes
checking for stdio.h... (cached) yes
checking for string.h... (cached) yes
checking for errno.h... yes
checking for stdarg.h... yes
checking for stdlib.h... (cached) yes
checking for unistd.h... (cached) yes
checking for fcntl.h... yes
checking for time.h... yes
checking for syslog.h... yes
checking for getopt.h... yes
checking for sysexits.h... yes
checking for signal.h... yes
checking for poll.h... yes
checking for sched.h... yes
checking for sys/types.h... (cached) yes
checking for sys/wait.h... yes
checking for sys/socket.h... yes
checking for sys/epoll.h... yes
checking for sys/timerfd.h... yes
checking for sys/signalfd.h... yes
checking for netdb.h... yes
checking for library containing clock_gettime... none required
checking for an ANSI C-conforming const... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands
   dh_auto_build
dh_auto_build: warning: Compatibility levels before 10 are deprecated (level 9 in use)
	make -j1
make[1]: Entering directory '/mnt/flatline-7'
make  all-am
make[2]: Entering directory '/mnt/flatline-7'
gcc -DHAVE_CONFIG_H -I.   -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -ffile-prefix-map=/mnt/flatline-7=. -fstack-protector-strong -Wformat -Werror=format-security -std=c99 -pipe -Wall -Werror -Wstrict-aliasing -include config.h -c -o flatline.o flatline.c
flatline.c: In function 'main':
flatline.c:659:52: error: ']' directive writing 1 byte into a region of size between 0 and 10 [-Werror=format-overflow=]
  659 |         sprintf(default_syslog_ident, "flatline[%ld]", (long)getpid());
      |                                                    ^
In file included from /usr/include/stdio.h:906,
                 from flatline.c:24:
In function 'sprintf',
    inlined from 'main' at flatline.c:659:2:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:30:10: note: '__builtin___sprintf_chk' output between 12 and 22 bytes into a destination of size 20
   30 |   return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   31 |                                   __glibc_objsize (__s), __fmt,
      |                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   32 |                                   __va_arg_pack ());
      |                                   ~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[2]: *** [Makefile:478: flatline.o] Error 1
make[2]: Leaving directory '/mnt/flatline-7'
make[1]: *** [Makefile:357: all] Error 2
make[1]: Leaving directory '/mnt/flatline-7'
dh_auto_build: error: make -j1 returned exit code 2
make: *** [debian/rules:4: build] Error 25
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
