Compilation error

[connermemory]

I encountered an issue while compiling on Ubuntu 16.04， and I looked up previous issues. This issue has solved this problem, but I don't know why it has been restored now.
The gcc version I am using is 5.4.0.

reader-pcsc.c: In function ‘detect_reader_features’:
reader-pcsc.c:1229:5: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing]
     PIN_PROPERTIES_STRUCTURE_v5 *caps = (PIN_PROPERTIES_STRUCTURE_v5 *) &buf;
     ^
reader-pcsc.c:1238:5: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing]
     PIN_PROPERTIES_STRUCTURE *caps = (PIN_PROPERTIES_STRUCTURE *) buf;
     ^
cc1: all warnings being treated as errors

[frankmorgner]

16.04 is not supported any longer. could it be that you're using an outdated version of OpenSC as well?

[Jakuje]

This was indeed fixed in #2241 but got back with a06abbf (from #2513) addressing some coverity concerns.

I would say that this old ubuntu is certainly unsupported, the same for the old gcc version. Given that this code works ok with all the current compilers, I would say this is really an gcc bug, which can be ignored by setting some compiler switches on your side, but there is really nothing we could do with it on our side.

[connermemory]

Okay, thank you. I changed to Ubuntu 22.04 and it can be successfully compiled.