리눅스에서 rcs-5.7을 설치하는데 오류가 납니다.

제가 리눅스에다가 rcs-5.7를 설치할려고 합니다.
근데 프로그램설치할때
#./configure
#make
#make install
이 순서대로 설치 하면 된다고 하는데 ./configure까지는 되는거 같은데 make를 실행하면 다음과 같이 화면이 나옵니다.

[root@ rcs-5.7]# ./configure
loading cache ./config.cache
checking diff basename... (cached) diff
checking for diff... (cached) /usr/bin/diff
checking diff success status... (cached) 0
checking diff failure status... (cached) 1
checking diff trouble status... (cached) 2
checking diff options for RCS... (cached) -an
checking diff -L... (cached) yes
checking diff3 -m... (cached) yes
checking for diff3... (cached) /usr/bin/diff3
checking for ed... (cached) /bin/ed
checking for sendmail... (cached) /usr/lib/sendmail
checking for pic... (cached) pic -n
checking for gcc... (cached) gcc
checking whether we are using GNU C... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for a BSD compatible install... (cached) /usr/bin/install -c
checking whether make sets ${MAKE}... (cached) yes
creating ./config.status
creating Makefile
creating man/Makefile
creating src/Makefile
[root@comwiz rcs-5.7]# make
cd man && make all
make[1]: 들어감 `/root/rcs-5.7/man' 디렉토리
make[1]: Nothing to be done for `all'.
make[1]: 나감 `/root/rcs-5.7/man' 디렉토리
cd src && make all
make[1]: 들어감 `/root/rcs-5.7/src' 디렉토리
rm -f a.*
ALL_CFLAGS=' -Dhas_conf_h -I. -I. -g -O' \
CC='gcc' \
COMPAT2='0' \
DIFF3='/usr/bin/diff3' DIFF3_BIN='1' \
DIFF='/usr/bin/diff' DIFFFLAGS='-an' DIFF_L='1' \
DIFF_SUCCESS='0' \
DIFF_FAILURE='1' \
DIFF_TROUBLE='2' \
ED='/bin/ed' \
LDFLAGS='' LIBS='' \
RCSPREFIX='/usr/local/bin/' \
SENDMAIL='"/usr/lib/sendmail"' \
/bin/sh -x ./conf.sh 3>&1 >a.h 2>conf.err
./conf.sh: testing permissions ...
./conf.sh: This command should not be run with superuser permissions.
make[1]: *** [conf.h] 오류 1
make[1]: 나감 `/root/rcs-5.7/src' 디렉토리
make: *** [all] 오류 2

무슨 오류 땜에 안되는 건가여?
설치 방법이 틀린건가여?
리눅스 고수님들 좀 도와주세여~ㅠ