Richard Shaw wrote on 2022/05/10 12:07:
I'm working on some IIoT related packages in my COPR where I have a dynamic
library linking to a static library and getting the following error:

/usr/bin/ld:
/usr/lib/gcc/x86_64-redhat-linux/12/../../../../lib64/libmqttc.a(mqtt.c.o):
warning: relocation against `mqtt_fixed_header_rules' in read-only section
`.text'
/usr/bin/ld:
/usr/lib/gcc/x86_64-redhat-linux/12/../../../../lib64/libmqttc.a(mqtt.c.o):
relocation R_X86_64_PC32 against symbol `mqtt_fixed_header_rules' can not
be used when making a shared object; recompile with -fPIC

I added the following to the libmqttc library and verified -fPIC -pie is in
the build flags[1] per the recommendation from the hardening page[2] but
the error remains.

Any ideas?

Thanks,
Richard

[1]
https://download.copr.fedorainfracloud.org/results/hobbes1069/IIoT/fedora-rawhide-x86_64/04386803-mqtt-c/builder-live.log.gz

This log no longer seems to exist.

[2] https://fedoraproject.org/wiki/Changes/Harden_All_Packages


Regards,
Mamoru
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