关于Libmemcached 编译

上一篇相关的，/2010/02/libmemcached-undefined-reference-to.html
这个是在CentOS 5.4上的编译。

但是这次是在 CentOS 4.6 上。GCC 版本 3.4.6。用上篇提供的方法，依旧是错。
这里测试了 0.37 和 0.38 两个版本。
编译参数如下：

./configure  --with-libevent-prefix=/usr/local/libevent --with-memcached --disable-64bit CFLAGS="-O3 -march=i686"

CCLD   clients/memslap
clients/ms_conn.o(.text+0x24b): In function `ms_conn_close':
clients/ms_conn.c:685: undefined reference to `__sync_fetch_and_sub'
clients/ms_conn.o(.text+0xc8e): In function `ms_setup_conn':
clients/ms_conn.c:380: undefined reference to `__sync_fetch_and_add'
clients/ms_conn.o(.text+0x11af): In function `ms_reconn_socks':
clients/ms_conn.c:1051: undefined reference to `__sync_fetch_and_add'
clients/ms_conn.o(.text+0x1351): In function `ms_verify_value':
clients/ms_conn.c:1808: undefined reference to `__sync_fetch_and_add'
clients/ms_conn.o(.text+0x13f8):clients/ms_conn.c:1767: undefined reference to `__sync_fetch_and_add'
clients/ms_conn.o(.text+0x17f4): In function `ms_build_udp_headers':
clients/ms_conn.c:194: undefined reference to `__sync_fetch_and_add'
clients/ms_conn.o(.text+0x1d46):clients/ms_conn.c:919: more undefined references to `__sync_fetch_and_add' follow
collect2: ld returned 1 exit status
make[2]: *** [clients/memslap] Error 1
make[2]: Leaving directory `/data2/space/libmemcached-0.38'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/data2/space/libmemcached-0.38'
make: *** [all] Error 2

和上次的错误略有不同。但是出错都是在 memslap 这个文件的编译上。
往上翻了翻，看到，所有的Warnings和Errors都是在 clients 下的文件编译上，而libmemcached 和 libhashkit 没问题。

于是，解决方案自然是把 clients 下所有的应用程序的编译干掉。
一开始直接去改configure出来的Makefile，太费劲了。于是只得去改 Makefile.am 然后去 automake 重新生产 Makefile.in
但是 CentOS 4.6 和 5.4 的两个系统的 autoconf 都是 2.59 的版本，改过的 Makefile.am

autoconf
aclocal.m4:20: warning: this file was generated for autoconf 2.63.
You have another version of autoconf.  It may work, but is not guaranteed to.
If you have problems, you may need to regenerate the build system entirely.
To do so, use the procedure documented by the package, typically `autoreconf'.
configure.ac:16: error: Autoconf version 2.62 or higher is required
aclocal.m4:530: AM_INIT_AUTOMAKE is expanded from...
m4/pandora_canonical.m4:246: PANDORA_CANONICAL_TARGET is expanded from...
configure.ac:16: the top level
autom4te: /usr/bin/m4 failed with exit status: 63

换到一台 Ubuntu Lucid Lynx 的机器上，autoconf 2.69, 修改 Makefile.am，注释掉了

include clients/include.am
include tests/include.am
include example/include.am
include support/include.am

重新 aclocal; autoreconf; automake .
打包扔到开发机上，编译顺利完成。


另外，下午验证了，libmemcached 0.38 + pecl memcached 1.0.1 在 CentOS 4.6上也出现了连接无法结束的情况/2010/03/tests-about-using-tokyotyrant-with-pecl.html