Re-gen.

configure

@@ -13533,7 +13533,39 @@ fi
 printf "%s\n" "$ac_cv_lib_srtp2_srtp_init" >&6; }
 if test "x$ac_cv_lib_srtp2_srtp_init" = xyes
 then :
-  LIBS_SRTP="-lsrtp2"
+
+   LIBS_SRTP="-lsrtp2"
+   # Test program to check if the srtp_protect function accepts size_t* argument
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking 'srtp_protect()' last argument type" >&5
+printf %s "checking 'srtp_protect()' last argument type... " >&6; }
+   original_cflags="$CFLAGS"
+   CFLAGS="$CFLAGS -Werror"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+     #include <stdlib.h>
+     #include <srtp2/srtp.h>
+int
+main (void)
+{
+srtp_t ctx; void* rtp_hdr; size_t len; return srtp_protect(ctx, rtp_hdr, &len);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  srtp_protect_lastarg=size_t
+else $as_nop
+  srtp_protect_lastarg=int
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+   CFLAGS="$original_cflags"
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $srtp_protect_lastarg" >&5
+printf "%s\n" "$srtp_protect_lastarg" >&6; }
+
+printf "%s\n" "#define SRTP_PROTECT_LASTARG ${srtp_protect_lastarg}" >>confdefs.h
+
 
 printf "%s\n" "#define ENABLE_SRTP2 1" >>confdefs.h