Spaces in macro expansion in a #include?

[Jonathan Wakely]

On 31 March 2014 17:53, xuinkrbin. wrote:
> Given a macro:
>
> #define A(x) #x
> #define B 1
> #define C 2
> #define D B C
>
> If I have the following:
>
> #include A(D)
>
> GCC seems to expand the macro to:
>
> "12"
>
> and search for a file named "12" instead of "1 2".

When I try that it searches for a file named "D"