Master and -Wformat-overflow warning

Hi Everyone,

I'm building Master on an ARM Cortex A7 dev-board with GCC 7.4.0.

It looks like GCC has one squawk:

gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I../include -I../include -I../VEX/pub -I../V
EX/pub -DVGA_arm=1 -DVGO_linux=1 -DVGP_arm_linux=1 -DVGPV_arm_linux_vanilla=1  -
I../coregrind -DVG_LIBDIR="\"/usr/local/lib/valgrind"\" -DVG_PLATFORM="\"arm-lin
ux\"" -g2 -O3  -O2 -g -Wall -Wmissing-prototypes -Wshadow -Wpointer-arith -Wstri
ct-prototypes -Wmissing-declarations -Wcast-qual -Wwrite-strings -Wempty-body -W
format -Wformat-signedness -Wformat-security -Wignored-qualifiers -Wmissing-para
meter-type -Wlogical-op -Wimplicit-fallthrough=2 -Wold-style-declaration -finlin
e-functions -fno-stack-protector -fno-strict-aliasing -fno-builtin  -marm -mcpu=
cortex-a8 -DENABLE_LINUX_TICKET_LOCK -g2 -O3 -MT m_aspacemgr/libcoregrind_arm_li
nux_a-aspacemgr-segnames.o -MD -MP -MF m_aspacemgr/.deps/libcoregrind_arm_linux_
a-aspacemgr-segnames.Tpo -c -o m_aspacemgr/libcoregrind_arm_linux_a-aspacemgr-se
gnames.o `test -f 'm_aspacemgr/aspacemgr-segnames.c' || echo './'`m_aspacemgr/as
pacemgr-segnames.c
vgdb.c: In function ‘standalone_send_commands’:
vgdb.c:1008:21: warning: ‘%02x’ directive writing between 2 and 8 bytes into a r
egion of size 3 [-Wformat-overflow=]
       sprintf(hex, "%02x", cksum);
                     ^~~~
vgdb.c:1008:20: note: directive argument in the range [0, 2147483647]
       sprintf(hex, "%02x", cksum);
                    ^~~~~~
In file included from /usr/include/stdio.h:862:0,
                 from vgdb.c:42:
/usr/include/arm-linux-gnueabihf/bits/stdio2.h:33:10: note: ‘__builtin___sprintf
_chk’ output between 3 and 9 bytes into a destination of size 3
   return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       __bos (__s), __fmt, __va_arg_pack ());
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mv -f m_aspacemgr/.deps/libcoregrind_arm_linux_a-aspacemgr-segnames.Tpo m_aspace
mgr/.deps/libcoregrind_arm_linux_a-aspacemgr-segnames.Po

Jeff


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