I want to delete some QoSs

[gongqinpeng]

I want to directly remove some QoSs that I don't need from the source code because there are strict code requirements in embedded environments.But I have some question :

I delete "src/core/ddsi/src/ddsi_plist.c"
line 2003 QP (USER_DATA, user_data, XO),
line 2006 QP (TOPIC_DATA, topic_data, XO),
line 2007 QP (GROUP_DATA, group_data, XO),
line 3591 .topic_data.length = 0,
.topic_data.value = NULL,
.group_data.length = 0,
.group_data.value = NULL,
.user_data.length = 0,
.user_data.value = NULL,
line 3629 .topic_data.length = 0,
.topic_data.value = NULL,
.group_data.length = 0,
.group_data.value = NULL,
.user_data.length = 0,
.user_data.value = NULL,
line 3695 .group_data.length = 0,
.group_data.value = NULL,
line 3704 .user_data.length = 0,
.user_data.value = NULL,

line 2012 QP (DEADLINE, deadline, XD),
line 2013 QP (LATENCY_BUDGET, latency_budget, XD),
line 3245 if ((dest->present & DDSI_QP_DEADLINE) && (dest->present & DDSI_QP_TIME_BASED_FILTER))
{
if (dest->deadline.deadline < dest->time_based_filter.minimum_separation)
return DDS_RETCODE_INCONSISTENT_POLICY;
}
line 3579 .deadline.deadline = DDS_INFINITY,
line 3580 .latency_budget.duration = 0,
line 3618 .deadline.deadline = DDS_INFINITY,
.latency_budget.duration = 0,
line 3656 .deadline.deadline = DDS_INFINITY,
.latency_budget.duration = 0,

line 2030 QP (OWNERSHIP, ownership, XE1),
line 2031 QP (OWNERSHIP_STRENGTH, ownership_strength, Xi),
line 3590 .ownership.kind = DDS_OWNERSHIP_SHARED,
line 3634 .ownership.kind = DDS_OWNERSHIP_SHARED,
line 3640 .ownership_strength.value = 0,
line 3679 .ownership.kind = DDS_OWNERSHIP_SHARED,

then I run the HelloworldPublisher

#0 plist_or_xqos_fini (dst=dst@entry=0x7fffffffdd90, shift=shift@entry=0, pmask=pmask@entry=18446744073709551615, qmask=qmask@entry=18446744073709551615) at /home/delete_data_qos/src/core/ddsi/src/ddsi_plist.c:2388
#1 0x00007ffff7f26515 in ddsi_plist_fini (plist=plist@entry=0x7fffffffdd90) at /home/delete_data_qos/src/core/ddsi/src/ddsi_plist.c:2558
#2 0x00007ffff7f5a06c in ddsi_write_and_fini_plist (wr=wr@entry=0x412f20, ps=ps@entry=0x7fffffffdd90, alive=alive@entry=true) at /home/delete_data_qos/src/core/ddsi/src/ddsi_transmit.c:972
#3 0x00007ffff7f40222 in ddsi_spdp_write (pp=pp@entry=0x410530) at /home/delete_data_qos/src/core/ddsi/src/ddsi_discovery_spdp.c:247
#4 0x00007ffff7f3562d in new_participant_guid (plist=0x7fffffffe070, flags=0, gv=0x4067e8, ppguid=0x7fffffffde10) at /home/delete_data_qos/src/core/ddsi/src/ddsi_participant.c:973
#5 ddsi_new_participant (p_ppguid=p_ppguid@entry=0x7fffffffe0d0, gv=0x4067e8, flags=flags@entry=0, plist=plist@entry=0x7fffffffe0e0) at /home/delete_data_qos/src/core/ddsi/src/ddsi_participant.c:1027
#6 0x00007ffff7f5fc20 in dds_create_participant (domain=, qos=0x7fffffffe0d0, listener=0x0) at /home/delete_data_qos/src/core/ddsc/src/dds_participant.c:140
#7 0x000000000040120c in main ()

in plist_or_xqos_fini , the "entry" 0x0 that's my question, I cannot access memory at address 0x0
I cannot create the participant
Because I deleted it from the file such as : line 2030 QP (OWNERSHIP, ownership, XE1),
line 2031 QP (OWNERSHIP_STRENGTH, ownership_strength, Xi), and their policy?

So how can I delete some QoSs that I don't need?