[Gambas-user] Get last errno from external function call

[Benoit Minisini]

Le 06/10/2022 à 17:19, Matheus Castello a écrit :
> 
> 
> On 10/5/2022 8:30 PM, vuott--- via User wrote:
>> Out of curiosity, maybe you could also try "System.GetExternSymbol ()":
>>
>>     Dim p As Pointer
>>
>>     p = System.GetExternSymbol("libgpiod", "errno")
>>
>>     Print Int@(p)
>>
>>
> 
> What I was doing previously was getting the pointer reference calling 
> `__errno_location`: 
> https://gist.github.com/microhobby/245022469ffbcea1a07a7579839d90a2#file-main-module-L13
> 
> That works too. What is actually overwriting the errno is the IDE's 
> Debug session ...
> If you try to run in the IDE debugger this will not work, this will 
> return 0 always. (Could you check if its reproducible in your side please?)
> 

I can modify the debugger so that is saves and restore 'errno'.

-- 
Benoît Minisini.