I am just getting back into the C programming realm and I am having an issue that I think is linker related.

I am using cmake for the first time as well, so that could be adding to my frustration.

I have included a third party header file that contains a typedef that my code is trying to use, and it has this line:

typedef struct a a_t

so my code has

a_t *var;
//later.....
var->member;// this line throws the error

which throws the

error: dereferencing pointer to incomplete type

So am I just missing another include file, or is this a linker issue? I am building this code in QtCreator and using cmake. I can dive on a_t to see that typedef declaration in the included header, but I can't seem to dive on "struct a" itself to see where it's coming from.

Thanks