Compiling in i686 #279

I am able to build on x86_64 Slackware, but in i686 Slackware I get, using Gcc 11.2.0:

gcc -DHAVE_CONFIG_H -I. -I../.. -I/tmp/SBo/SmallBASIC-12_33/src -DPACKAGE_LIB_DIR=""/usr/local/lib/smallbasic"" -Wall -Werror -Wno-unused-result -O2 -march=i586 -mtune=i686 -std=gnu11 -MT ../lib/matrix.o -MD -MP -MF $depbase.Tpo -c -o ../lib/matrix.o ../lib/matrix.c &&
mv -f $depbase.Tpo $depbase.Po
depbase=echo ../lib/xpm.o | sed 's|[^/]*$|.deps/&|;s|\.o$||';
gcc -DHAVE_CONFIG_H -I. -I../.. -I/tmp/SBo/SmallBASIC-12_33/src -DPACKAGE_LIB_DIR=""/usr/local/lib/smallbasic"" -Wall -Werror -Wno-unused-result -O2 -march=i586 -mtune=i686 -std=gnu11 -MT ../lib/xpm.o -MD -MP -MF $depbase.Tpo -c -o ../lib/xpm.o ../lib/xpm.c &&
mv -f $depbase.Tpo $depbase.Po
scan.c: In function ‘comp_udp_id’:
scan.c:363:27: error: ‘%s’ directive writing up to 128 bytes into a region of size between 1 and 2147483645 [-Werror=format-overflow=]
363 | sprintf(name, "%s/%s", root, base);
| ^~ ~~~~
scan.c:363:9: note: ‘sprintf’ output between 3 and 2147483775 bytes into a destination of size 2147483647
363 | sprintf(name, "%s/%s", root, base);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[2]: *** [Makefile:501: scan.o] Error 1
make[2]: Leaving directory '/tmp/SBo/SmallBASIC-12_33/src/common'
make[1]: *** [Makefile:543: all-recursive] Error 1
make[1]: Leaving directory '/tmp/SBo/SmallBASIC-12_33'
make: *** [Makefile:484: all] Error 2