在ubuntu上安装drcom很简单
只要make&&make install就行了
但在gentoo却遇到了很多问题 ，先是不能编译，少了什么变量，security_ops，然后到网上搜，好不容易找到了一个解决方法，（当时我的内核是2.6.22，后来才更新到2.6.24）
在网友zrx550 http://hi.baidu.com/z%5Fr%5Fx那看到这篇文章
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linux下的drcom是在2.6的内核中开发的，用到了<linux/security.h>中的security_ops。>但是这个 EXPORT_SYMBOL 在2.6.24的内核中被取消了，导致drcom不能被成功的编译。随之
而来的问题就是新内核在需要drcom的网络环境中不能上网了。就这个问题我请教了开源版>本drcom开发者之一的Wheelz。目前最简单的办法只能修改内核，重新编译。针对2.6.24的>内核,具体办法如下：
1) 在内核的security/security.c文件的最后加上EXPORT_SYMBOL(security_ops);
2) 重新编译一下内核。
3) drcom-1.3.7/kmod/proto.c在#include <linux/security.h>后面加上一句：
extern struct security_operations *security_ops;
4）编译安装drcom。
但却始终不起作用，编译了好几次内核，始终没用，后来在.config 中加入
先 grep SECURITY .config 然后vim .config
CONFIG_SECURITY=y
CONFIG_SECURITY_NETWORK=y
前几次编译都不成功，好像编译时重新配置内核，立马^C,
然后又一次次偿试，终于可以了。
到这里我发现了一个问题，一般情况了我重新编译内核都不会
make clean 而这次编译了7分钟，所以我觉得它应该将内核重新编译了一遍，以前编译时只要很短的时间，特别是改动很少的时候，因为它没有全部重新编译，只是编译了那些配置改变了的部分，而当它们的依赖关系比较严重时，系统就会自动全部重新编译，所以以后当内核改0动比较大时，最好先make clean下
最后终于安装成功了，但确不能登录，试了好几个方法
drcomcd
drcomc login
drcomc logout
都不行，经过好多次试验才可以上网了
后来发现只有以root用户登录后，
1。drcomd
2登录：drcomc login
3.登出:drcomc logout
然后就一切OK了，然后再以普通用户登录就可以了。
我是在用普通用户登录后，然后Ctrl +Alt +F1,进入一个终端用root登录， 再dromd,drcomc login
登录成功后，再返回到图形界面： Ctrl +Alt +F7
下面是我的调试信息，希望你在检索进能够检索到：
make
make -C drcomc
make[1]: Entering directory `/home/pjq/drcom-1.3.7/drcomc’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o drcomc.o drcomc.c
gcc drcomc.o -o drcomc
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/drcomc’
make -C drcomd
make[1]: Entering directory `/home/pjq/drcom-1.3.7/drcomd’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o drcomd.o drcomd.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o daemon.o daemon.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o cleanup.o cleanup.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o dialog.o dialog.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o handle.o handle.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o init.o init.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o keepalive.o keepalive.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o login.o login.c
login.c: 在函数 ‘drcom_login’ 中：
login.c:50: 警告：未使用的参数 ‘timeout’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o logout.o logout.c
logout.c: 在函数 ‘drcom_logout’ 中：
logout.c:34: 警告：未使用的参数 ‘timeout’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o md5.o md5.c
md5.c:131:36: 警告：使用 C99 long long 整数常量
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o misc.o misc.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o passwd.o passwd.c
passwd.c: 在函数 ‘drcom_passwd’ 中：
passwd.c:32: 警告：未使用的参数 ‘timeout’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o readconf.o readconf.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o watchport.o watchport.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o getaddr.o getaddr.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o log.o log.c
log.c: 在函数 ‘dbg’ 中：
log.c:34: 警告：未使用的参数 ‘format’
gcc -lm -lpthread drcomd.o daemon.o cleanup.o dialog.o handle.o init.o keepalive.o login.o logout.o md5.o misc.o passwd.o readconf.o watchport.o getaddr.o log.o -o drcomd
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/drcomd’
make -C kmod
make[1]: Entering directory `/home/pjq/drcom-1.3.7/kmod’
make -C /lib/modules/2.6.22-gentoo-r9/build M=/home/pjq/drcom-1.3.7/kmod modules
make[2]: Entering directory `/usr/src/linux-2.6.22-gentoo-r9′
CC [M] /home/pjq/drcom-1.3.7/kmod/init.o
CC [M] /home/pjq/drcom-1.3.7/kmod/proc.o
CC [M] /home/pjq/drcom-1.3.7/kmod/proto.o
/home/pjq/drcom-1.3.7/kmod/proto.c: 在函数 ‘init_hijack’ 中：
/home/pjq/drcom-1.3.7/kmod/proto.c:450: 错误：‘security_ops’ 未声明 (在此函数内第一次使用)
/home/pjq/drcom-1.3.7/kmod/proto.c:450: 错误：(即使在一个函数内多次出现，每个未声明的标识符在其
/home/pjq/drcom-1.3.7/kmod/proto.c:450: 错误：所在的函数内只报告一次。)
/home/pjq/drcom-1.3.7/kmod/proto.c: 在函数 ‘cleanup_hijack’ 中：
/home/pjq/drcom-1.3.7/kmod/proto.c:461: 错误：‘security_ops’ 未声明 (在此函数内第一次使用)
make[3]: *** [/home/pjq/drcom-1.3.7/kmod/proto.o] 错误 1
make[2]: *** [_module_/home/pjq/drcom-1.3.7/kmod] 错误 2
make[2]: Leaving directory `/usr/src/linux-2.6.22-gentoo-r9′
make[1]: *** [default] 错误 2
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/kmod’
make: *** [kmod] 错误 2
make
make -C drcomc
make[1]: Entering directory `/home/pjq/drcom-1.3.7/drcomc’
make[1]: Nothing to be done for `all’.
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/drcomc’
make -C drcomd
make[1]: Entering directory `/home/pjq/drcom-1.3.7/drcomd’
make[1]: Nothing to be done for `all’.
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/drcomd’
make -C kmod
make[1]: Entering directory `/home/pjq/drcom-1.3.7/kmod’
make -C /lib/modules/2.6.22-gentoo-r9/build M=/home/pjq/drcom-1.3.7/kmod modules
make[2]: Entering directory `/usr/src/linux-2.6.22-gentoo-r9′
CC [M] /home/pjq/drcom-1.3.7/kmod/proto.o
/home/pjq/drcom-1.3.7/kmod/proto.c: 在函数 ‘init_hijack’ 中：
/home/pjq/drcom-1.3.7/kmod/proto.c:453: 错误：提领指向不完全类型的指针
/home/pjq/drcom-1.3.7/kmod/proto.c:454: 错误：提领指向不完全类型的指针
/home/pjq/drcom-1.3.7/kmod/proto.c: 在函数 ‘cleanup_hijack’ 中：
/home/pjq/drcom-1.3.7/kmod/proto.c:461: 错误：提领指向不完全类型的指针
/home/pjq/drcom-1.3.7/kmod/proto.c:462: 错误：提领指向不完全类型的指针
make[3]: *** [/home/pjq/drcom-1.3.7/kmod/proto.o] 错误 1
make[2]: *** [_module_/home/pjq/drcom-1.3.7/kmod] 错误 2
make[2]: Leaving directory `/usr/src/linux-2.6.22-gentoo-r9′
make[1]: *** [default] 错误 2
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/kmod’
make: *** [kmod] 错误 2
localhost drcom-1.3.7 # make
make -C drcomc
make[1]: Entering directory `/home/pjq/drcom-1.3.7/drcomc’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o drcomc.o drcomc.c
gcc drcomc.o -o drcomc
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/drcomc’
make -C drcomd
make[1]: Entering directory `/home/pjq/drcom-1.3.7/drcomd’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o drcomd.o drcomd.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o daemon.o daemon.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o cleanup.o cleanup.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o dialog.o dialog.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o handle.o handle.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o init.o init.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o keepalive.o keepalive.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o login.o login.c
login.c: In function ‘drcom_login’:
login.c:50: warning: unused parameter ‘timeout’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o logout.o logout.c
logout.c: In function ‘drcom_logout’:
logout.c:34: warning: unused parameter ‘timeout’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o md5.o md5.c
md5.c:131:36: warning: use of C99 long long integer constant
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o misc.o misc.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o passwd.o passwd.c
passwd.c: In function ‘drcom_passwd’:
passwd.c:32: warning: unused parameter ‘timeout’
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o readconf.o readconf.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o watchport.o watchport.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o getaddr.o getaddr.c
gcc -Wall -W -Wstrict-prototypes -Wmissing-prototypes -pedantic -I/home/pjq/drcom-1.3.7/include -O2 -c -o log.o log.c
log.c: In function ‘dbg’:
log.c:34: warning: unused parameter ‘format’
gcc -lm -lpthread drcomd.o daemon.o cleanup.o dialog.o handle.o init.o keepalive.o login.o logout.o md5.o misc.o passwd.o readconf.o watchport.o getaddr.o log.o -o drcomd
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/drcomd’
make -C kmod
make[1]: Entering directory `/home/pjq/drcom-1.3.7/kmod’
make -C /lib/modules/2.6.22-gentoo-r9/build M=/home/pjq/drcom-1.3.7/kmod modules
make[2]: Entering directory `/usr/src/gentoolinux/linux-2.6.22-gentoo-r9′
CC [M] /home/pjq/drcom-1.3.7/kmod/init.o
CC [M] /home/pjq/drcom-1.3.7/kmod/proc.o
CC [M] /home/pjq/drcom-1.3.7/kmod/proto.o
/home/pjq/drcom-1.3.7/kmod/proto.c: In function ‘init_hijack’:
/home/pjq/drcom-1.3.7/kmod/proto.c:453: error: dereferencing pointer to incomplete type
/home/pjq/drcom-1.3.7/kmod/proto.c:454: error: dereferencing pointer to incomplete type
/home/pjq/drcom-1.3.7/kmod/proto.c: In function ‘cleanup_hijack’:
/home/pjq/drcom-1.3.7/kmod/proto.c:461: error: dereferencing pointer to incomplete type
/home/pjq/drcom-1.3.7/kmod/proto.c:462: error: dereferencing pointer to incomplete type
make[3]: *** [/home/pjq/drcom-1.3.7/kmod/proto.o] 错误 1
make[2]: *** [_module_/home/pjq/drcom-1.3.7/kmod] 错误 2
make[2]: Leaving directory `/usr/src/gentoolinux/linux-2.6.22-gentoo-r9′
make[1]: *** [default] 错误 2
make[1]: Leaving directory `/home/pjq/drcom-1.3.7/kmod’
make: *** [kmod] 错误 2
localhost drcom-1.3.7 # drcomcd
1206323834 DEBUG drcomcd: Redirecting stderr to /var/log/drcomcd…
Segmentation fault
localhost drcom-1.3.7 # drcomc login
1206323840 DEBUG drcomc: Creating socket…
1206323840 DEBUG drcomc: Connecting…
drcomc: Connect: No such file or directory
localhost drcom-1.3.7 # drcomc logout
1206323843 DEBUG drcomc: Creating socket…
1206323843 DEBUG drcomc: Connecting…
drcomc: Connect: No such file or directory