When I build on Macbook I get like 8000+ this warning and can’t run or build project.
I looked like everywhere but no solutions clearly.
this goes like that , I tried on my windows project , also tried with new clean project but I got same error every time.
I get the same problem but with 60.000 warnings, and I dont find a solution
After a lot of research, it seems that Xcode 9 checks the prototype function, and a warning is added for empty param, if the word “void” is not added.
example :
int my_func(); > warning
int my_func(void); > no warning
Unity dont add the word “void”. It was possible to ignore this warning previously in Xcode, but it seems not possible now
So no solution…
still waiting pro answer 
Hey. Could you please report the issue with Unity Bug Reporter and provide a small example project?