On Fri, 13 Jan 2006 13:13:32 -0500
Chapman Flack <nblists@anastigmatix.net> wrote:

> I looked in the gcc 2.95.3 manual and it already supported initializers
> with designators, e.g. { .d_open = fooopen, .d_close = fooclose } which
> is being used to good advantage in FreeBSD to reduce reliance on exact
> struct layouts.  So that should be usable even on the current vax port.
> 
> The manual didn't say, though, whether unmentioned fields get explicitly
> zeroed, as C99 assures. Anybody know (for 2.95.3)?

Fortunately, I still have a 1.6.1 box using GCC 2.95.3:

 --- (/dev/ttyp2) mmondor@gobot.xisop $ cc -o test test.c
 --- (/dev/ttyp2) mmondor@gobot.xisop $ ./test                                 
i1 = 4294967295, i2 = 0, p1 = 0xffffffff, p2 = 0x0
 --- (/dev/ttyp2) mmondor@gobot.xisop $ cc -v
Using builtin specs.
gcc version 2.95.3 20010315 (release) (NetBSD nb3)

Program was:

#include <stdio.h>
#include <stdlib.h>

struct test {
        unsigned int    i1, i2;
        void            *p1, *p2;
};

int     main(void);

int
main(void)
{
        struct test     t = { .i1 = -1, .p1 = (void *)0xffffffff };

        printf("i1 = %u, i2 = %u, p1 = %p, p2 = %p\n",
            t.i1, t.i2, t.p1, t.p2);

        return EXIT_SUCCESS;
}

So it does seem to work and zero other fields

Matt

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