AIX Missing Symbols ap_cleanup_scoreboard and ap_accept_lock_mech for Apache Process. However, the symbols do exist - mod-wsgi

Question

I am having a problem whereby apache is not able to find certain symbols referenced from a library (mod_wsgi) loaded within the apache process.
When i start the apache process, i get this error.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
root [zibal]% ./usr/local/apache2/bin/apachectl restart httpd: Syntax error on line 53 of /usr/local/apache2/conf/httpd.conf: Cannot load /usr/local/apache2/modules/mod_wsgi.so into server:
rtld:0712-001 Symbol ap_cleanup_scoreboard was referenced from module /usr/local/apache2/modules/mod_wsgi.so(), but a runtime definition of the symbol was not found.
rtld: 0712-001 Symbol ap_accept_lock_mech was referenced from module /usr/local/apache2/modules/mod_wsgi.so(), but a runtime definition of the symbol was not found
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I am pasting the output of nm command on the apache executable and those symbols seem to exist.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
root [zibal]% nm ./usr/local/apache2/bin/httpd | grep ap_accept_lock_mech
ap_accept_lock_mech D 536880332
ap_accept_lock_mech d 536900392 4
ap_accept_lock_mech:G879 - 0
root [zibal]% nm ./usr/local/apache2/bin/httpd | grep ap_cleanup_scoreboard
.ap_cleanup_scoreboard T 268613428 212
ap_cleanup_scoreboard D 536890068
ap_cleanup_scoreboard d 536890068 12
ap_cleanup_scoreboard d 536899972 4
ap_cleanup_scoreboard:F385 - 2976 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Please guide.

Answer 1

And this is how I was able to solve this issue (I had to do apply two solutions as indicated below).
Solution 1 (Thanks to Graham Dumpleton)
Don't change anything in Apache Code.
Go into mod_wsgi.c source code and change:
/*
* Cleanup the Apache scoreboard to ensure that any
* shared memory segments or memory mapped files not
* available to code in daemon processes.
*/
ap_cleanup_scoreboard(0);
to
#if 0
/*
* Cleanup the Apache scoreboard to ensure that any
* shared memory segments or memory mapped files not
* available to code in daemon processes.
*/
ap_cleanup_scoreboard(0);
#endif
and then look for:
#if !defined(AP_ACCEPT_MUTEX_TYPE)
sconfig->lock_mechanism = ap_accept_lock_mech;
#else
sconfig->lock_mechanism = APR_LOCK_DEFAULT;
#endif
and change it to:
#define AP_ACCEPT_MUTEX_TYPE 1
#if !defined(AP_ACCEPT_MUTEX_TYPE)
sconfig->lock_mechanism = ap_accept_lock_mech;
#else
sconfig->lock_mechanism = APR_LOCK_DEFAULT;
#endif
Then build mod_wsgi
Solution 2 (Thanks to Jeff Trawick from Apache)
Extract the Source tar ball in a directory.....cd into that directory
Locate the file include/mpm_common.h
Change
extern apr_lockmech_e ap_accept_lock_mech;
to
AP_DECLARE_DATA extern apr_lockmech_e ap_accept_lock_mech;
Locate the file include/scoreboard.h
Change
apr_status_t ap_cleanup_scoreboard(void *d);
to
AP_DECLARE(apr_status_t) ap_cleanup_scoreboard(void *d);
And then issue the following commands
./configure
make
After this step, there will be a httpd.exp file create in the server
directory and a httpd file created in the present directory
remove httpd
edit server/httpd.exp and add one line for ap_accept_lock_mech
make
make install (as root)
Then build mod_wsgi 3.3 from Source Tarball
I hope this helps others facing the same problem.