I am trying to learn XS and I am trying to do Example 5 from PerlXSut on a Windows 7 machine using dmake, The example is, 

        SV * paths
    INIT:
        AV * results;
        I32 numpaths = 0;
        int i, n;
        struct statfs buf;

        if ((!SvROK(paths))
            || (SvTYPE(SvRV(paths)) != SVt_PVAV)
            || ((numpaths = av_len((AV *)SvRV(paths))) < 0))
        {
            XSRETURN_UNDEF;
        }
        results = (AV *)sv_2mortal((SV *)newAV());
    CODE:
        for (n = 0; n <= numpaths; n++) {
            HV * rh;
            STRLEN l;
            char * fn = SvPV(*av_fetch((AV *)SvRV(paths), n, 0), l);

            i = statfs(fn, &buf);
            if (i != 0) {
                av_push(results, newSVnv(errno));
                continue;
            }

            rh = (HV *)sv_2mortal((SV *)newHV());

            hv_store(rh, "f_bavail", 8, newSVnv(buf.f_bavail), 0);
            hv_store(rh, "f_bfree",  7, newSVnv(buf.f_bfree),  0);
            hv_store(rh, "f_blocks", 8, newSVnv(buf.f_blocks), 0);
            hv_store(rh, "f_bsize",  7, newSVnv(buf.f_bsize),  0);
            hv_store(rh, "f_ffree",  7, newSVnv(buf.f_ffree),  0);
            hv_store(rh, "f_files",  7, newSVnv(buf.f_files),  0);
            hv_store(rh, "f_type",   6, newSVnv(buf.f_type),   0);

            av_push(results, newRV((SV *)rh));
        }
        RETVAL = newRV((SV *)results);
    OUTPUT:
        RETVAL

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The problem is when I run 'dmake' I keep seeing this error, I am unsure what to do, any suggestions?

MyTest.xs:45: error: storage size of 'buf' isn't known

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In reply to Learning XS dmake problem by Herkum

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