Mixing C and D code in the same program?

Is it possible? i.e. compile .c with dmc and .d with dmd and then link them together, will this work? Will I be able to call D functions from C code, share globals etc? Thanks.

Yes it is possible. In fact this is one of the main feature of dmd. To call a D function from C, just make that function `extern©`, e.g.

// .d
import std.c.stdio;
extern © {
shared int x; // Globals without 'shared' are thread-local in D2.
// You don't need shared in D1.
void increaseX() {
++ x;
printf("Called in D code\n"); // for some reason, writeln crashes on Mac OS X.
}
}


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// .c
#include <stdio.h>
extern int x;
void increaseX(void);

int main (void) {
printf("x = %d (should be 0)\n", x);
increaseX();
printf("x = %d (should be 1)\n", x);
return 0;
}

See [*Interfacing to C*](

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) for more info.

The above answer is wrong as far as I know.
Because the D main routine has to be called before you use any D functions.
This is necessary to "initialize" D, f.e. its garbage collection.
To solve that, you simply can make the program be entered by a main routine in D or you can somehow call the D main routine from C. (But I dont know exactly how this one works)