openssl编程，出错

openssl版本：openssl-0.9.8b-8，我编了一个小程序用来将根CA的证书添加到自己的信息的证书库中，参考了http://www.ibm.com/developerworks/cn/linux/l-openssl.html，编译的时候没错，运行时出现段错误源码如下：



#include "openssl/bio.h"
#include "openssl/ssl.h"
#include "openssl/err.h"
void main()
{
/* Initializing OpenSSL */
SSL_load_error_strings();
ERR_load_BIO_strings();
OpenSSL_add_all_algorithms();
SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method());
if(! SSL_CTX_load_verify_locations(ctx, "/NFS_mount/chip/project/openssl_test/server/Certificate/cacert.crt", NULL))
{
    printf("Handle failed load here!\n");
}
}

makefile如下：
downCA: downCA.c
        gcc downCA.c -lssl -o downCA
clean:
        rm  downCA



[root@localhost server]# make
gcc downCA.c -lssl -o downCA
downCA.c: 在函数 ‘main’ 中：
downCA.c:4: 警告：‘main’ 的返回类型不是 ‘int’
警告但没报错运行downCA
./downCA
[root@localhost server]# ./downCA
段错误


有经验的兄弟帮帮忙阿～

参考了http://www.ibm.com/developerworks/cn/linux/l-openssl.html的作者的handshake.c（http://www.kennethballard.com/developerWorks/sslhandshake.c）源码一样编译没问题，但是运行的时候出错，怀疑我的架构和内核了

通过修改makefile：

downCA: downCA.c
        gcc downCA.c -lssl -static -o downCA
clean:
        rm  downCA

出现了一大堆错误：
(.text+0x19f1): undefined reference to `ERR_put_error'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_srvr.o): In function `ssl2_accept':
(.text+0x19fb): undefined reference to `ERR_clear_error'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_srvr.o): In function `ssl2_accept':
(.text+0x1a3e): undefined reference to `ERR_put_error'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_srvr.o): In function `ssl2_accept':
(.text+0x1a76): undefined reference to `ERR_put_error'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_srvr.o): In function `ssl2_accept':
(.text+0x1abe): undefined reference to `ERR_put_error'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_srvr.o): In function `ssl2_accept':
(.text+0x1b10): undefined reference to `ERR_put_error'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_srvr.o): In function `ssl2_accept':
(.text+0x1b5f): undefined reference to `ERR_put_error'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_srvr.o).text+0x1ba7): more undefined references to `ERR_put_error' follow
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_lib.o): In function `ssl2_write_error':
(.text+0x1ed): undefined reference to `OpenSSLDie'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_lib.o): In function `ssl2_generate_key_material':
(.text+0x25c): undefined reference to `EVP_md5'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_lib.o): In function `ssl2_generate_key_material':
(.text+0x267): undefined reference to `EVP_MD_CTX_init'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_lib.o): In function `ssl2_generate_key_material':
(.text+0x2c6): undefined reference to `EVP_DigestUpdate'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_lib.o): In function `ssl2_generate_key_material':
(.text+0x2dd): undefined reference to `EVP_DigestUpdate'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_lib.o): In function `ssl2_generate_key_material':
(.text+0x2fd): undefined reference to `EVP_DigestUpdate'
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../libssl.a(s2_lib.o): In function `ssl2_generate_key_material':


这是否说明是库本身的问题？libssl.so?libssl.a