undefined reference to `vtable for

[mchinand]

Do the capital C/H extensions force compiling this with the c compiler instead of c++?

[J.Hilk]

@JonB yes, the error message probably changed after @SPlatten added the missing function body that the Q_PROPERTY macro referred to.

@SPlatten are you sure config.c is party of your project ? :D so the linker can find it

[JonB]

@SPlatten
I'm with @JoeCFD on one thing: if you get "incomprehensible"/"impossible" error messages, especially about vtables, with Qt you (may) need to do a "change underpants"-type clean rebuild. Preferable buy a new machine ;-) But if not delete the whole build output directory and try again.....

[SPlatten]

This post is deleted!

[JonB]

@SPlatten

@J-Hilk said in undefined reference to `vtable for:

@SPlatten are you sure config.c is party of your project ? :D so the linker can find it

?? Look at actual linker statement being executed?

Hmm, originally you showed

.build/config.o: In function asv::scm::helm::staledata_t::staledata_t()':

immediately above the undefined reference to vtable message. Is that still present? Because that does imply the linker is trying to pull in config.o, which would imply it does appear on the linker command line.... Is that indeed the right .build/config.o path for the config.o you keep rebuilding?

[J.Hilk]

@SPlatten

soooo, since you'e not using m_nextUDN anywhere else and its private.... have you considered simply using:

static uint16_t nextUDN() {
        static uint16_t m_nextUDN = 0;
        return ++(m_nextUDN);
    }

?

[SPlatten]

This post is deleted!

[JoeCFD]

@SPlatten not config.cpp or config.cc? it is not c code, right?

[JonB]

@JoeCFD
It it were compiled as C code, it wouldn't begin to compile :) So I think we can assume whatever his file extension it's being compiled as C++!

[JoeCFD]

@JonB it is wrong and should be changed since gcc(not g++) will be applied for it.

[JonB]

@JoeCFD
I'm guessing he has been using this for a while, seems strange this one and only error would show up now.

@SPlatten
I don't know whether this matters with gcc/g++. Do you want to show us the complete command-line being used to compile your config.c file?

[JoeCFD]

@JonB with flag -x gcc will work for c++ code as well. But it is better to separate c and c++ code with .c and .cpp

[SPlatten]

This post is deleted!

[SPlatten]

This post is deleted!

[SPlatten]

@JonB , sorry to do this, can you please delete any posts where you have quoted my text or edit to remove quoted text. I am in trouble as I have mentioned project names in my posts that I should not have and as a result my contract has been terminated.

Thank you,
Simon

[JonB]

@SPlatten I have PMed you.....