On Sun, Jul 5, 2020 at 3:07 PM zatrazz <zatr...@gmail.com> wrote:
>
> On Sun, Jul 5, 2020 at 4:00 PM Bruno Haible via cfarm-users
> <cfarm-users@lists.tetaneutral.net> wrote:
>>
>> > b2sum-src/b2sum.c:266:26: error: array type has incomplete element
>> > type 'struct option'
>> > static struct option long_options[] = {
>> > ^~~~~~~~~~~~
>>
>> When you use 'struct option', you need to
>>
>> 1) use Gnulib module 'getopt-gnu' - see the documentation
>> https://www.gnu.org/software/gnulib/manual/html_node/getopt.html
>> https://www.gnu.org/software/gnulib/manual/html_node/getopt_002eh.html
>>
>> https://www.gnu.org/software/gnulib/manual/html_node/getopt_005flong.html
>>
>> 2) #include <getopt.h>, not <unistd.h> - see the documentation
>> https://www.gnu.org/software/gnulib/MODULES.html#module=getopt-gnu
>
> And getopt(3) with long options is a GNU extension implemented by glibc, some
> other libc also provides similar interfaces (such as FreeBSD with
> getopt_long).
>
> However it seems that AIX does not have a similar interface so the best option
> is indeed to use gnulib.
Ack, thanks Bruno and zatrazz.
Jeff
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