alignof applied to an expression is a GNU extension

[alexpacini]

My gcc compiler gives me this warning:

'_Alignof' applied to an expression is a GNU extension [-Wgnu-alignof-expression]

The alignof is used for example in:

void pbtools_decoder_read_string(struct pbtools_decoder_t *self_p,
                                 int wire_type,
                                 char **value_pp)
{
    uint64_t size;

    size = decoder_read_length_delimited(self_p, wire_type);
    *value_pp = decoder_heap_alloc(self_p,
                                   size + 1,
                                   alignof(**value_pp) );

    if (*value_pp == NULL) {
        return;
    }

    decoder_read(self_p, (uint8_t *)*value_pp, size);
    (*value_pp)[size] = '\0';
}

If I change it to __alignof__ (https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/rzarg/alignof.htm) this warning disappears.

[eerimoq]

Try release 0.29.1, available on PyPI. Clang no longer warns about using the GNU extension. Let me know if your compiler still complains.

[alexpacini]

Fixed, gcc stopped complaining.

Thanks!