Enum definition and declaration

[duracell]

Hi to all,

I have a small problem using enums with chibistudio.



If I compile my project with the following piece of code:

!	Message from: duracell
	typedef enum {CLOSE_VALVE, OPEN_VALVE} valve_state; //valve_state valve1;

The compier does its job without errors.

If I de-comment the line of the declaration of valve1 I have the following error:
^

!	Message from: duracell
	Linking build/ch.elf build/obj/main.o (symbol from plugin): In function `valve1': (.text+0x0): multiple definition of `valve1' build/obj/extlib.o (symbol from plugin):(.text+0x0): first defined here collect2.exe: error: ld returned 1 exit status make: *** [build/ch.elf] Error 1

I don't have other declarations of valve1, so I don't know which C rule I am breaking


Thanks to all for reading.

[Giovanni]

Hi,

Note that it is a linker error, probably you have that same symbol in another module OR that code is placed in a header, placing variable declarations in headers creates an instance each time the header is included.

Giovanni

[duracell]

Thank you very much Giovanni, yes the declaration was in the header.

I did not know about this rule, I moved the declaration in the .c and now it is ok!