Platform i386
I'm getting this:

all ===> less
/usr/src/tools/obj/tools.NetBSD-1.5.2-i386/bin/i386--netbsdelf-gcc -O2  -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-uninitialized -Wno-error -Werror  -I/usr/src/usr.bin/less/less -I/usr/src/usr.bin/less/less/../lesskey -DSYSDIR=\"/etc\" -nostdinc -isystem //usr/include  -c /usr/src/usr.bin/less/less/charset.c
cc1: warnings being treated as errors
In file included from /usr/src/usr.bin/less/less/less.h:412,
                 from /usr/src/usr.bin/less/less/charset.c:19:
/usr/src/usr.bin/less/less/funcs.h:3: warning: function declaration isn't a prototype
/usr/src/usr.bin/less/less/funcs.h:4: warning: function declaration isn't a prototype
/usr/src/usr.bin/less/less/funcs.h:5: warning: function declaration isn't a prototype
/usr/src/usr.bin/less/less/funcs.h:6: warning: function declaration isn't a prototype
/usr/src/usr.bin/less/less/funcs.h:7: warning: function declaration isn't a prototype
  <many more>

trying to build less from a very current current.  What am I doing wrong?

TIA,
Paul