| Re: Reading external variables from a library (BIND) |
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Group: comp.lang.fortran · Group Profile
Author: RaúlRaúl Date: Sep 17, 2008 02:39
> On 17 Sep, 07:37, Arjen Markus wrote:
>
>
>>> On 16 sep, 17:06, glen herrmannsfeldt ugcs.caltech.edu> wrote:>
>>> Arjen Markus wrote:
>
>>> (snip)
>
>>>> The easiest way to deal with errno, I'd say, is create a
>>>> small C function along these lines:
>
>>>> void get_errno( int &errno_value ) {
>>>> Â Â *errno_value = errno;
>>>> }
>
>>> or
>
>>> int get_errno() {
>>> Â Â Â return errno;
>
>>> }- Tekst uit oorspronkelijk bericht niet weergeven -
>
>>> - Tekst uit oorspronkelijk bericht weergeven -
>
>> I did not do it that way, because a function without arguments
>> can be optimised away - cf. the design of random_number.
>
> Maybe
>
> volatile int get_errno() {
> Â Â Â return errno;
>
> ? No idea if you can do this in C. In fortran at least according to
> MR&C volatile can only be
> applied to variables
>
> Ian
Thanks to everybody for your suggestions. I suppose that is not a
problem of external library. It should be a problem of using a bad
symbol name.
I tried your two solution and they work fine. But finally I found a
more clean solution, use ierrno_() intrinsic compatible in XL Fortran.
I didn't realize its existence.
Thanks for your help.
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