Re: [PATCH] meson: disable "maybe uninitilized" errors with -Og

On Mon, Jul 27, 2026 at 09:30:54AM -0400, Michael S. Tsirkin wrote:
> GCC's "maybe uninitilized" warnings depend on optimizations
> for code flow analysis, and produce false positive errors
> with -Og. Default build gives us coverage with that,
> so let's just disable with -Og.
> 
> Signed-off-by: Michael S. Tsirkin <[email protected]>

ping, comments on this?

As an alternative, I can see us doing this for everyone
and only adding -Werror=maybe-uninitialized in CI for
known good compiler/flag combos which do not produce
too many false positives.


> ---
>  meson.build | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/meson.build b/meson.build
> index 164328ded8..a119dae6ac 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -742,6 +742,10 @@ warn_flags = [
>    '-Wno-typedef-redefinition',
>  ]
>  
> +if get_option('optimization') == 'g'
> +  warn_flags += ['-Wno-error=maybe-uninitialized']
> +endif
> +
>  if host_os != 'darwin'
>    tsa_has_cleanup = cc.compiles('''
>      struct __attribute__((capability("mutex"))) mutex {};
> -- 
> MST