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magent编译及常见异常解决方法

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magent编译及常见错误解决办法

 

安装magent到/usr/local/下


cd /usr/local
mkdir magent
cd magent/
wget http://memagent.googlecode.com/files/magent-0.6.tar.gz
tar zxvf magent-0.6.tar.gz
/sbin/ldconfig
sed -i "s#LIBS = -levent#LIBS = -levent -lm#g" Makefile
make

错误1:

    gcc -lrt -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c
    magent.c: In function ‘writev_list’:
    magent.c:729: error: ‘SSIZE_MAX’ undeclared (first use in this function)
    magent.c:729: error: (Each undeclared identifier is reported only once
    magent.c:729: error: for each function it appears in.)
    make: *** [magent.o] Error 1

解决办法:
vi ketama.h


在开头加入
   
#ifndef SSIZE_MAX
# define SSIZE_MAX      32767
#endif

错误2:

    gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c
    gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o ketama.o ketama.c
    gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a
    /usr/lib64/libevent.a(event.o): In function `gettime’:
    (.text+0×449): undefined reference to `clock_gettime’
    /usr/lib64/libevent.a(event.o): In function `event_base_new’:
    (.text+0x72a): undefined reference to `clock_gettime’
    collect2: ld returned 1 exit status
    make: *** [magent] Error 1

解决办法
vim Makefile
   
CFLAGS = -Wall -g -O2 -I/usr/local/include $(M64)
改为:   
CFLAGS = -lrt -Wall -g -O2 -I/usr/local/include $(M64)


错误3:centos 6


[root@test magent]# make
gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c
gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o ketama.o ketama.c
gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a
gcc: /usr/lib64/libm.a:没有那个文件或目录
make: *** [magent] 错误 1
解决办法

ln -s /usr/lib64/libm.so /usr/lib64/libm.a

 

注:有可能还会报错 gcc: /usr/lib64/libevent.a: 没有那个文件或目录

如果有,可执行

vi Makefile

 

找到 LIBS = /usr/lib64/libevent.a /usr/lib64/libm.a

修改 LIBS = /usr/libevent 的安装路径/libevent.a /usr/lib64/libm.a

例: LIBS = /usr/lib/libevent.a /usr/lib64/libm.a

 

查看magent是否安装成功

cd usr/bin/magent ./magent

 

 

please provide -s "ip:port" argument

 

memcached agent v0.6 Build-Date: Oct 15 2012 16:12:30

Usage:

  -h this message

  -u uid

  -g gid

  -p port, default is 11211. (0 to disable tcp support)

  -s ip:port, set memcached server ip and port

  -b ip:port, set backup memcached server ip and port

  -l ip, local bind ip address, default is 0.0.0.0

  -n number, set max connections, default is 4096

  -D don't go to background

  -k use ketama key allocation algorithm

  -f file, unix socket path to listen on. default is off

  -i number, set max keep alive connections for one memcached server, default is 20

  -v verbose

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