all ===> sys/arch/sparc/stand/boot
making sure the sa library is up to date...
cc -O2 -Wall -Wstrict-prototypes -Wmissing-prototypes  -Werror  -I.
-D_STANDALONE -DRELOC=0x300000
-DSUN4 -DSUN4C -DSUN_BOOTPARAMS -I../../.
-I/usr/src/sys/arch/sparc/stand/boot/../../.. -I/usr/src/
sys/arch/sparc/stand/boot/../../../.. -nostdinc -idirafter
/altroot/usr/include   -DCOMPAT_UFS  -D_
_INTERNAL_LIBSA_CREAD -nostdinc -idirafter /altroot/usr/include -c
/usr/src/sys/lib/libsa/tftp.c
cc1: warnings being treated as errors
/usr/src/sys/lib/libsa/tftp.c:97: warning: function declaration isn't a
prototype
/usr/src/sys/lib/libsa/tftp.c:155: warning: function declaration isn't a
prototype
/usr/src/sys/lib/libsa/tftp.c:199: warning: function declaration isn't a
prototype
/usr/src/sys/lib/libsa/tftp.c:233: warning: function declaration isn't a
prototype
*** Error code 1

Stop.