Re: [Tinycc-devel] Using tcc for reflection

[Michael Matz]

Hello,

On Tue, 1 Feb 2022, Domingo Alvarez Duarte wrote:

> Hello Elijah !
>
> On 1/2/22 6:30, Elijah Stone wrote:
> >  ‘cleanup’ variable attribute
>
> It doesn't seem that tinycc has this implemented properly because testing it 
> with this example 
> https://echorand.me/site/notes/articles/c_cleanup/cleanup_attribute_c.html I 
> can build and execute it but there is no output (with gcc there is the 
> expected output).

This is deceptive!  The GNU libc headers unconditionally define 
'__attribute__()' to nothing if the compiler isn't GCC, and not just 
internally, so a declaration like:

#include <stdio.h>
....

  int __attribute__((whatever!)) avar;

doesn't set any attribute at all :-/  Either do:

#undef __attribute__

after including all standard headers, or use the other form of that token:

  int __attribute((cleanup(clean_up))) avar = 1;


Ciao,
Michael.