memcached 3.1.3 does not compile on PHP 8.0

[Hackwar]

Hello,
we are running memcached in our CI system and have a daily PHP image for the newer versions and unfortunately the memcached extension doesn't compile anymore for PHP 8.0.

Our docker image file is here: https://github.com/joomla-projects/docker-images/tree/php8.0

And the error is

/usr/src/php/ext/memcached/php_memcached_session.c: In function 'ps_read_memcached':
/usr/src/php/ext/memcached/php_memcached_session.c:448:25: error: expected ')' before 'TSRMLS_CC'
   php_error_docref(NULL TSRMLS_CC, E_WARNING, "error getting session from memcached: %s", memcached_last_error_message(memc));
                         ^~~~~~~~~
/usr/src/php/ext/memcached/php_memcached_session.c:448:3: error: too few arguments to function 'php_error_docref'
   php_error_docref(NULL TSRMLS_CC, E_WARNING, "error getting session from memcached: %s", memcached_last_error_message(memc));
   ^~~~~~~~~~~~~~~~
In file included from /usr/src/php/ext/memcached/php_memcached.h:20,
                 from /usr/src/php/ext/memcached/php_memcached_session.c:17:
/usr/local/include/php/main/php.h:342:23: note: declared here
 PHPAPI ZEND_COLD void php_error_docref(const char *docref, int type, const char *format, ...)
                       ^~~~~~~~~~~~~~~~
/usr/src/php/ext/memcached/php_memcached_session.c: In function 'ps_write_memcached':
/usr/src/php/ext/memcached/php_memcached_session.c:478:26: error: expected ')' before 'TSRMLS_CC'
    php_error_docref(NULL TSRMLS_CC, E_WARNING, "error saving session to memcached: %s", memcached_last_error_message(memc));
                          ^~~~~~~~~
/usr/src/php/ext/memcached/php_memcached_session.c:478:4: error: too few arguments to function 'php_error_docref'
    php_error_docref(NULL TSRMLS_CC, E_WARNING, "error saving session to memcached: %s", memcached_last_error_message(memc));
    ^~~~~~~~~~~~~~~~
In file included from /usr/src/php/ext/memcached/php_memcached.h:20,
                 from /usr/src/php/ext/memcached/php_memcached_session.c:17:
/usr/local/include/php/main/php.h:342:23: note: declared here
 PHPAPI ZEND_COLD void php_error_docref(const char *docref, int type, const char *format, ...)
                       ^~~~~~~~~~~~~~~~
make: *** [Makefile:206: php_memcached_session.lo] Error 1