Re: coreutils and GCC -fanalyzer

[Pádraig Brady]

On 02/07/2020 01:26, Paul Eggert wrote:
> On 5/23/20 9:08 AM, Paul Eggert wrote:
>
> > So I am thinking of killing two
> > stones by doing the following.
> >
> > 1. Test for -fanalyzer, -Wall, -Wextra.
> >
> > 2. Test for flags not automatically enabled by -fanalyzer, -Wall, -Wextra but
> > flags that we want anyway.
> >
> > 3. Test for flags automatically enabled by -fanalyzer, -Wall, -Wextra that are
> > also flags that we don't want.
>
> I did that in Gnulib by installing the attached patch. This could greatly
> increase compile times due to the -fanalyzer option, so let's keep an eye out
> for that.

s/could/does/.
compile time has gone from seconds to minutes for coreutils at least.

I'd be inclined to not enable -fanalyzer by default.
At least not until it matures more.
-fanalyzer didn't find any actual issues in coreutils,
and currently bails on most files (after taking lots of time about it),
as indicated with the -Wanalyzer-too-complex option.

cheers,
Pádraig