#   compile  mbrlabel/mbrlabel.o
/usr/BUILD64/tools/bin/x86_64--netbsd-gcc -O2  -Wall -Wstrict-prototypes -Wmissi
ng-prototypes -Wpointer-arith -Wno-sign-compare -Wno-traditional -Wreturn-type -
Wswitch -Wshadow -Wcast-qual -Wwrite-strings  -Werror   -I/usr/src/sbin/disklabe
l  -nostdinc -isystem /usr/BUILD64/netbsd/usr/include  -c    /usr/src/sbin/mbrla
bel/mbrlabel.c
/usr/src/sbin/mbrlabel/mbrlabel.c: In function `main':
/usr/src/sbin/mbrlabel/mbrlabel.c:283: warning: comparison is always false due t
o limited range of data type

*** Failed target:  mbrlabel.o

The statement in question is

                        if ((errno == ERANGE && sector == ULONG_MAX) ||
                            sector > UINT32_MAX)

sector is declared uint32_t, which is probably wrong.

		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb