bug#56030: The guix pull profile is too big

[(]

On Thu Jul 21, 2022 at 3:52 PM BST, Maxime Devos wrote:
>   * Add a macro '#define system ...' that calls this variant and inserts
>     __guix_bin_sh as the shell executable

Would this not violate POSIX? Since, as far as I can see,
<https://pubs.opengroup.org/onlinepubs/9699919799/functions/system.html>
does not give the implementation license to implement system(3) as a
macro. We could do

```
int system(const char *command) {
        return __guix_run_in_shell(command, __guix_bin_sh);
}
```

though.

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