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用vsftpd+ssl的FTP 出现严重错误，请大家帮忙指点下谢谢

root@szyzh vsftpd-2.0.6]# make
gcc -c main.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c utility.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c prelogin.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c ftpcmdio.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c postlogin.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c privsock.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c tunables.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c ftpdataio.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c secbuf.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c ls.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c postprivparent.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c logging.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c str.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c netstr.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c sysstr.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c strlist.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c banner.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c filestr.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c parseconf.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c secutil.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c ascii.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c oneprocess.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c twoprocess.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c privops.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c standalone.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c hash.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c tcpwrap.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c ipaddrparse.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c access.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c features.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c readwrite.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c opts.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c ssl.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c sysutil.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -c sysdeputil.c -O2 -Wall -W -Wshadow  -idirafter dummyinc
gcc -o vsftpd main.o utility.o prelogin.o ftpcmdio.o postlogin.o privsock.o tunables.o ftpdataio.o secbuf.o ls.o postprivparent.o logging.o str.o netstr.o sysstr.o strlist.o banner.o filestr.o parseconf.o secutil.o ascii.o oneprocess.o twoprocess.o privops.o standalone.o hash.o tcpwrap.o ipaddrparse.o access.o features.o readwrite.o opts.o ssl.o sysutil.o sysdeputil.o -Wl,-s `./vsf_findlibs.sh`
ssl.o(.text+0x564): In function `ssl_cert_digest':
: undefined reference to `EVP_sha256'
ssl.o(.text+0x89: In function `setup_bio_callbacks':
: undefined reference to `BIO_set_callback'
ssl.o(.text+0x8ad): In function `setup_bio_callbacks':
: undefined reference to `BIO_set_callback'
collect2: ld returned 1 exit status
make: *** [vsftpd] 错误 1
[root@szyzh vsftpd-2.0.6]#


我的不知道为什么，总是make 的时候出错。我的是linux as4
一直找不到办法，我是新手，希望大家提点下，谢谢！
如果可以。加我的QQ:2487707 指导下，谢谢