There are TWO Memcached clients in the PHP Extension Community Library. They are quite unhelpfully named Memcache (http://pecl.php.net/package/memcache) and Memcached (http://pecl.php.net/package/memcached). Here is a handy comparison chart: http://code.google.com/p/memcached/wiki/PHPClientComparison

The instructions in this blog post are for the Memcached client. If you’re using a library that calls the Memcache class, this client will not work for you. However, the installation steps should be quite similar to get the Memcache client up and running.

Which is a preferable library? For a long while there was no development activity on Memcache, so it appeared as though Memcached was going to supplant it. However, as of this morning it looks like there is some new activity in the last 30 days on Memcache, so who knows. Some (old) discussion is here: http://serverfault.com/questions/63383/memcache-vs-memcached

I lost about 15 minutes trying to sort this out, so hopefully some future visitor to this page will save themselves the trouble.

You seem to have a different m4 version installed to me. Mine is:

GNU M4 1.4.6
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Written by Rene' Seindal.

This is the version that was installed after using the Xcode installer on my Snow Leopard install DVD. How did you install your UNIX Dev Support tools?

jon@memcached-1.0.2: phpize
Configuring for:
PHP Api Version: 20090626
Zend Module Api No: 20090626
Zend Extension Api No: 220090626
/Developer/usr/bin/gm4: unrecognized option `–debugfile=autom4te.cache/traces.0t’
Try `/Developer/usr/bin/gm4 –help’ for more information.
autom4te-2.63: /Developer/usr/bin/gm4 failed with exit status: 1

It looks like an error in passing options to the m4 script.. any thoughts?

This is my version of m4:
m4 (GNU M4) 1.4.15

Warning: touch(): Unable to create file /usr/lib/php/.lock because Permission denied in PEAR/Registry.php on line 835

I checked the folder, and despite being administration of my iMac (running Snow Leopard), the folder says I can only read in the “Get Info” dialog, and I’ve been unable to change the owner to myself via sudo.

What can I do to install memcached at this stage?

“mike-2:memcached-1.0.2 mike$ sudo make install
Installing shared extensions: /usr/lib/php/extensions/no-debug-non-zts-20090626/”

- and restarted apache, but I don’t see the memcache section within a file containing phpinfo(). I’m running SL 10.6.4 – any thoughts?

bash > make

app:memcached-1.0.0 Admin$ make
/bin/sh /tmp/memcached-1.0.0/libtool –mode=compile cc -I/usr/include/php -I. -I/tmp/memcached-1.0.0 -DPHP_ATOM_INC -I/tmp/memcached-1.0.0/include -I/tmp/memcached-1.0.0/main -I/tmp/memcached-1.0.0 -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -I/usr/local/include -DHAVE_CONFIG_H -g -O2 -c /tmp/memcached-1.0.0/php_memcached.c -o php_memcached.lo
mkdir .libs
cc -I/usr/include/php -I. -I/tmp/memcached-1.0.0 -DPHP_ATOM_INC -I/tmp/memcached-1.0.0/include -I/tmp/memcached-1.0.0/main -I/tmp/memcached-1.0.0 -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -I/usr/local/include -DHAVE_CONFIG_H -g -O2 -c /tmp/memcached-1.0.0/php_memcached.c -fno-common -DPIC -o .libs/php_memcached.o
/tmp/memcached-1.0.0/php_memcached.c: In function ‘php_memc_get_impl’:
/tmp/memcached-1.0.0/php_memcached.c:371: warning: passing argument 4 of ‘memcached_mget_by_key’ from incompatible pointer type
/tmp/memcached-1.0.0/php_memcached.c:408: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c:440: warning: passing argument 4 of ‘memcached_mget_by_key’ from incompatible pointer type
/tmp/memcached-1.0.0/php_memcached.c: In function ‘php_memc_getMulti_impl’:
/tmp/memcached-1.0.0/php_memcached.c:577: warning: passing argument 4 of ‘memcached_mget_by_key’ from incompatible pointer type
/tmp/memcached-1.0.0/php_memcached.c:607: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c:610: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c: In function ‘php_memc_getDelayed_impl’:
/tmp/memcached-1.0.0/php_memcached.c:726: warning: passing argument 4 of ‘memcached_mget_by_key’ from incompatible pointer type
/tmp/memcached-1.0.0/php_memcached.c: In function ‘zim_Memcached_fetch’:
/tmp/memcached-1.0.0/php_memcached.c:801: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c:804: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c: In function ‘zim_Memcached_fetchAll’:
/tmp/memcached-1.0.0/php_memcached.c:852: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c:855: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c: In function ‘zim_Memcached_setOption’:
/tmp/memcached-1.0.0/php_memcached.c:1785: error: ‘memcached_st’ has no member named ‘hash’
/tmp/memcached-1.0.0/php_memcached.c: In function ‘php_memc_do_result_callback’:
/tmp/memcached-1.0.0/php_memcached.c:2324: warning: assignment discards qualifiers from pointer target type
/tmp/memcached-1.0.0/php_memcached.c:2327: warning: assignment discards qualifiers from pointer target type
make: *** [php_memcached.lo] Error 1
app:memcached-1.0.0 Admin$