https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113582
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|incorrect warning about |incorrect warning about
|unused label with `pragma |unused label with `pragma
|GCC diagnostic` inside a |GCC diagnostic` around the
|template |unused label
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I originally thought this was due to a template but nope, it is to due with
where the warning happens. Which is at the end of the function.
That is this does not work:
```
void do_something(){
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-label"
start:;
#pragma GCC diagnostic pop
}
```
But this causes the warning not to happen:
```
void do_something(){
start:;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-label"
}
#pragma GCC diagnostic pop
```
Note another way to remove the warning is just to mark the lable as unused with
an attribute like:
```
[[gnu::unused]]start:
```
Which is slightly shorter than using the pragma too.
