Kamailio 5.8 build generates on my Debian 12 the following warning:

core/mem/q_malloc.c:996:14: warning: 'qm_strnstr' defined but not used [-Wunused-function] 996 | static void *qm_strnstr(const void *b1, int l1, const void *b2, int l2) | ^~~~~~~~~~

Perhaps the definition of the function should be #ifdef'ed by DBG_QM_MALLOC.

-- Juha