[BUILDROBOT] dwarf2out_do_cfi_startproc(bool)’: may write a terminating nul past the end of the destination

Jan-Benedict Glaw jbglaw@lug-owl.de
Fri Sep 30 17:07:00 GMT 2016


Hi!

When building for --target=sparc-leon-elf (using config-list.mk) with
a current GCC, I get this error message (cf.
http://toolchain.lug-owl.de/buildbot/show_build_details.php?id=632317):

g++ -fno-PIE -c   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H -I. -I. -I/home/jbglaw/repos-configlist_mk/gcc/gcc -I/home/jbglaw/repos-configlist_mk/gcc/gcc/. -I/home/jbglaw/repos-configlist_mk/gcc/gcc/../include -I/home/jbglaw/repos-configlist_mk/gcc/gcc/../libcpp/include -I/opt/cfarm/mpc/include  -I/home/jbglaw/repos-configlist_mk/gcc/gcc/../libdecnumber -I/home/jbglaw/repos-configlist_mk/gcc/gcc/../libdecnumber/dpd -I../libdecnumber -I/home/jbglaw/repos-configlist_mk/gcc/gcc/../libbacktrace   -o dwarf2out.o -MT dwarf2out.o -MMD -MP -MF ./.deps/dwarf2out.TPo /home/jbglaw/repos-configlist_mk/gcc/gcc/dwarf2out.c
/home/jbglaw/repos-configlist_mk/gcc/gcc/dwarf2out.c: In function ‘void dwarf2out_do_cfi_startproc(bool)’:
/home/jbglaw/repos-configlist_mk/gcc/gcc/dwarf2out.c:942:1: error: may write a terminating nul past the end of the destination [-Werror=format-length=]
 dwarf2out_do_cfi_startproc (bool second)
 ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/jbglaw/repos-configlist_mk/gcc/gcc/dwarf2out.c:973:36: note: format output between 10 and 21 bytes into a destination of size 20
        current_function_funcdef_no);
                                    ^
cc1plus: all warnings being treated as errors
Makefile:1102: recipe for target 'dwarf2out.o' failed

I haven't really tracked down since when that error/warning shows up
and whether or not it's valid, but maybe you might want to have a look?

MfG, JBG

-- 
      Jan-Benedict Glaw      jbglaw@lug-owl.de              +49-172-7608481
Signature of: "Debugging is twice as hard as writing the code in the first place.
the second  :  Therefore, if you write the code as cleverly as possible, you are,
               by definition, not smart enough to debug it." - Brian W. Kernighan
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