[Issue 9931] Mac OS X ABI not followed when returning structs for extern (C)

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9931



--- Comment #22 from Jacob Carlborg <doob at me.com> 2013-04-25 23:35:21 PDT ---
(In reply to comment #21)

> Here's the code from pastebin. I'd prefer small examples to be posted here
> rather than linked to.

Fair enough. Here's the latest test case. It doesn't depend on any external
functions or casts:

C code:

struct Foo
{
    int a;
    int b;
    int c;
};

typedef struct Foo Foo;

Foo foo (int a)
{
    Foo f;
    f.a = 1;
    f.b = 2;
    f.c = 3;
    return f;
}

D code:

struct Foo
{
    int a;
    int b;
    int c;
}

extern (C) Foo foo (int a);

Foo bar ()
{
    return foo(0);
}

extern (C) int printf(in char*, ...);

void main ()
{
    auto frame = bar();
    printf("a=%d b=%d c=%d\n".ptr, frame.a, frame.b, frame.c);
}

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