Hi,
I had the same problem but I'm using a heavily modified Redhat 6.1 system so
that seems to indicate that its not limited to a glibc2.2 problem.
Everything compiled fine, but when starting up httpd it gave the "undefined
symbol: pthread_create"  error as below.  I have libpthread installed in
/lib which is in /etc/ld.so.conf.  I did a "strings" on the library and the
symbol does exist in it.   I can provide more info if it helps.

John


> Problem 3 - "configtest" fails
> 
> Moved mod_webapp.so into /usr/local/apache/libexec and added 
> some config
> directives to the httpd.conf file, including
> 
>   LoadModule webapp_module libexec/mod_webapp.so
> 
> but running the "configtest" option throws this error:
> 
>   Cannot load /usr/local/apache/libexec/mod_webapp.so into server:
>   /usr/local/lib/libapr.so.0: undefined symbol: pthread_create
> 
> As you can see, it correctly found where my libapr.so shared 
> library is,
> but cannot find the pthreads library - even though it's 
> installed.  This
> *could* be because Red Hat 7.1 uses libc-2.2.2.so, and I've 
> heard others
> have had problems with this.
> 

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