Re: Help: Ada in NetBSD

[Fernando Oleo Blanco <irvise_ml@irvise.xyz>]

On 30.08.21 00:08, Stephane Carrez wrote:
> Hi!
> 
> The reason for the symbol change is some NetBSD libc change in the signature of some system calls.
> Some information in: http://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/lib/libc/README

Thank you very much for the link. It does explain quite a few things


 > Simon is right, the symbol used by the Ada import statement must be 
renamed.

> The __gettimeofday50 is the new function signature while _gettimeofday is the old one.
> The gettimeofday is the weak alias to _gettimeofday and produces the warning.
> 
> Beware that the symbol name that you specify for some import statement is platform specific.
> Having a different symbol names for NetBSD is quite common.

However, I still would say that is not right. Here is my 
reasoning/arguments:

- All programs would have to be corrected just for NetBSD if the linker 
does not do the alias translation automatically.

- I think the linker is doing the aliasing correctly, meaning, that any 
program that references such functions directly, get linked correctly to 
the actual implementation. After all, the alias is just another 
identifier for the actual function.

- The linker does not complain when linking these files during the 
compilation of GCC.

- JMarino's gcc6-aux does not use an special identifier. It also uses 
the "normal" function name directly and it compiles and works. See: 
https://github.com/NetBSD/pkgsrc/blob/27a8f94efc02f33007d20a4ba6a8aaa369361b95/lang/gcc6-aux/files/diff-ada#L1584 
for another function that gets "renamed". It just works.

The last point is what makes me _very_ hesitant about this issue. Why 
would it work for JMarino's gcc and not mine? I have compiled JMarino's 
port in the same system.

I may be missing some other fix in some other part...

Anyhow, for the time being, I want to get this working. I will try this 
fix and see if it solves the issue.

> Thanks for the link to the NetBSD git sources, I'm trying to build and keep you informed in my progress :-)
> 
> Stephane
> 

Great!

Regards,
-- 
Fernando Oleo Blanco
https://irvise.xyz