[Modules] mod_auth_xradius works, but not attempt connection to memcached

Daniel Maher dma at witbe.net
Fri Nov 12 08:07:41 EST 2010

On 11/12/2010 12:25 PM, Daniel Maher wrote:

> mod_auth_xradius 0.4.6 configured as :
> $ ./configure --with-apxs=`which apxs` --with-apr-memcache=/usr/lib

> checking for apr_memcache library in /usr/lib/lib... yes
> checking for apr_memcache_create in -lapr_memcache... yes
> configure: using '-R/usr/lib/lib -L/usr/lib/lib -lapr_memcache' for memcache

Addendum : specifying --with-apr-memcache=/usr/lib is the only way to 
have configure find the memcache libraries, however it ends up writing 
"/usr/lib/lib" as the library path in the Makefile.  I went in manually 
and altered the Makefile to point to /usr/lib (as normal), re-compiled, 
and re-installed.

This had absolutely no effect.  I ran a strace of httpd -X on two 
machines : one with the /usr/lib/lib/ reference, and one with the 
"correct" /usr/lib/ reference.  In the former, Apache was smart enough 
to look in /usr/lib anyways, so the net result was the same : in both 
cases /usr/lib/libapr_memcache.so.0 is opened.

Clearly mod_auth_xradius is aware of the fact that it should attempt to 
use memcache, but my strace-fu isn't strong enough to make any further 
statments about the following :

758   open("/usr/lib/libapr_memcache.so.0", O_RDONLY) = 5
758   read(5, 
512) = 512
758   fstat64(5, {st_mode=S_IFREG|0755, st_size=14132, ...}) = 0
5, 0) = 0x497000
758   mmap2(0x49a000, 4096, PROT_READ|PROT_WRITE, 
758   close(5)                          = 0

Any insight would be most welcome.

Daniel Maher <dma AT witbe DOT net>
"The Internet is completely over." -- Prince

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