dynsec.c:394: undefined reference to `cJSON_ParseWithLength

[rgaufman]

Hi there, this is my Linux version:

Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.4 LTS
Release:	20.04
Codename:	focal

I installed these compile dependencies:

sudo apt-get -y install uuid-dev libsystemd-dev libssl-dev libcjson-dev checkinstall

When I try to compile, I see this:

~/mosquitto-2.0.14$ sudo checkinstall --default --backup=no --deldoc=yes --install=yes --pkgname=mosquitto --pkgversion='2.0.14'

checkinstall 1.6.3, Copyright 2010 Felipe Eduardo Sanchez Diaz Duran
           This software is released under the GNU GPL.



*****************************************
**** Debian package creation selected ***
*****************************************

This package will be built according to these values:

0 -  Maintainer: [ root@Tetherbox-debac85d9451dc0395bd ]
1 -  Summary: [ Package created with checkinstall 1.6.3 ]
2 -  Name:    [ mosquitto ]
3 -  Version: [ 2.0.14 ]
4 -  Release: [ 1 ]
5 -  License: [ GPL ]
6 -  Group:   [ checkinstall ]
7 -  Architecture: [ amd64 ]
8 -  Source location: [ mosquitto-2.0.14 ]
9 -  Alternate source location: [  ]
10 - Requires: [  ]
11 - Recommends: [  ]
12 - Suggests: [  ]
13 - Provides: [ mosquitto ]
14 - Conflicts: [  ]
15 - Replaces: [  ]

Enter a number to change any of them or press ENTER to continue:

Installing with make install...

========================= Installation results ===========================
set -e; for d in lib apps client plugins src; do make -C ${d}; done
make[1]: Entering directory '/data/deployer/mosquitto-2.0.14/lib'
make -C cpp
make[2]: Entering directory '/data/deployer/mosquitto-2.0.14/lib/cpp'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/data/deployer/mosquitto-2.0.14/lib/cpp'
make[1]: Leaving directory '/data/deployer/mosquitto-2.0.14/lib'
make[1]: Entering directory '/data/deployer/mosquitto-2.0.14/apps'
set -e; for d in db_dump mosquitto_ctrl mosquitto_passwd; do make -C ${d}; done
make[2]: Entering directory '/data/deployer/mosquitto-2.0.14/apps/db_dump'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/data/deployer/mosquitto-2.0.14/apps/db_dump'
make[2]: Entering directory '/data/deployer/mosquitto-2.0.14/apps/mosquitto_ctrl'
cc  mosquitto_ctrl.o client.o dynsec.o dynsec_client.o dynsec_group.o dynsec_role.o get_password.o memory_mosq.o memory_public.o options.o password_mosq.o ../../lib/libmosquitto.so.1 -o mosquitto_ctrl  -lcrypto   ../../lib/libmosquitto.so.1 -lcjson -ldl
/usr/bin/ld: dynsec.o: in function `dynsec__payload_callback':
/data/deployer/mosquitto-2.0.14/apps/mosquitto_ctrl/dynsec.c:394: undefined reference to `cJSON_ParseWithLength'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:45: mosquitto_ctrl] Error 1
make[2]: Leaving directory '/data/deployer/mosquitto-2.0.14/apps/mosquitto_ctrl'
make[1]: *** [Makefile:9: all] Error 2
make[1]: Leaving directory '/data/deployer/mosquitto-2.0.14/apps'
make: *** [Makefile:66: mosquitto] Error 2

****  Installation failed. Aborting package creation.

Cleaning up...OK

Bye.

Any ideas?

[ralight]

/data/deployer/mosquitto-2.0.14/apps/mosquitto_ctrl/dynsec.c:394: undefined reference to `cJSON_ParseWithLength'

Around line 394 looks like this:

390: #if CJSON_VERSION_FULL < 1007013
391:     UNUSED(payloadlen);
392:     tree = cJSON_Parse(payload);
393: #else
394:     tree = cJSON_ParseWithLength(payload, (size_t)payloadlen);
395: #endif

Which suggests that you have a header file which claims cJSON 1.7.14 or 1.7.15, but the library being linked against is cJSON 1.7.13 or earlier. Is it possible you've manually compiled a more recent cJSON to /usr/local, for example, but still have the Ubuntu packaged version installed?

[rgaufman]

It's possible, I will try this, thank you! - I tried this on a clean Ubuntu 20.04 install and it compiled correctly, so this is something to do with my system for sure.