memcached+magent组成高可用

cd
  libevent-2.0.21-stable

./configure –prefix=/usr/local/libevent

make

make
  install

cd
  memcached-1.4.32

./configure
  --prefix=/opt/memcached --with-libevent=/usr/local/libevent/

make

make
  install

gcc
  -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c

magent.c:71:19:
  error: event.h: No such file or directory

magent.c:130: error: field ‘ev’ has incomplete type

magent.c:161: error: field ‘ev’ has incomplete type

magent.c: In function ‘server_free’:

magent.c:494:
  warning: implicit declaration of function ‘event_del’

magent.c:
  In function ‘pool_server_handler’:

magent.c:514: error: ‘EV_READ’ undeclared (first use in this function)

magent.c:514:
  error: (Each undeclared identifier is reported only once

# 解决办法，检查下libevent安装路径，如果自定义安装了，拷贝下路径库。

ln -s /usr/lib/libevent*  /usr/lib64/

[[email protected]
  magent]# make

gcc
  -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

解决方法：

vi ./ketama.h

#在开头加入

#ifndef SSIZE_MAX

#define SSIZE_MAX     
  32767

#endif

#libm.a不存在的时候，需要拷贝下面so，如果没有，需要安装glibc glibc-devel

cp
  /usr/lib64/libm.so /usr/lib64/libm.a

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‘:

/root/libevent-2.0.21-stable/event.c:370:
  undefined reference to `clock_gettime‘

/usr/lib64/libevent.a(event.o):
  In function `detect_monotonic‘:

/root/libevent-2.0.21-stable/event.c:340:
  undefined reference to `clock_gettime‘

collect2:
  ld returned 1 exit status

make:
  *** [magent] Error 1

解决方法：

vi
  Makefile

CFLAGS
  = -Wall -g -O2 -I/usr/local/include $(M64)

改为：

CFLAGS
  = -lrt -Wall -g -O2 -I/usr/local/include $(M64)

[[email protected]
  magent5]# make

gcc
  -lrt -Wall -g -O2 -I/usr/local/include 
  -o magent magent.o ketama.o -levent

ketama.o:
  In function `create_ketama‘:

/root/magent5/ketama.c:399:
  undefined reference to `floorf‘

collect2:
  ld returned 1 exit status

make:
  *** [magent] Error 1

解决办法：

vi
  Makefile

LIBS =
  -levent –lm