Error when running make on the checkpassword application

I am receiving the following error when running "make" on the checkpassword=
 program...

./load checkpassword prot.o unix.a byte.a  `cat \
shadow.lib` `cat crypt.lib` `cat s.lib`
checkpassword.o(.text+0xfa): In function `main':
: undefined reference to `errno'
checkpassword.o(.text+0x243): In function `main':
: undefined reference to `errno'
checkpassword.o(.text+0x265): In function `main':
: undefined reference to `errno'
unix.a(pathexec_run.o)(.text+0xf6): In function `pathexec_run':
: undefined reference to `errno'
unix.a(pathexec_run.o)(.text+0x13a): In function `pathexec_run':
: undefined reference to `errno'
unix.a(alloc.o)(.text+0x48): more undefined references to `errno' follow
collect2: ld returned 1 exit status
make: *** [checkpassword] Error 1

What should I do? Help!


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Stephen J. Brewer
Senior IT Administrator
Scientific Research Corporation
[email protected]
(256) 428-9297