Re: -Wall

[Paul Eggert <eggert@cs.ucla.edu>]

On 04/04/2016 11:22 AM, Lars Magne Ingebrigtsen wrote:
> There's a lot fewer warnings when compiling with -Wall in emacs/src now
> than there used to be, but there should be none, I think.

I'm getting no warnings when I build.

> Are there any of them that, like, are there for a reason (i.e., we
> disagree with the gcc people that those things should be warned about),
> or are they all things that should be fixed?
>

It's more the other way around: -Wall doesn't generate enough warnings. 
Please try './configure --enable-gcc-warnings'. This uses -Wall plus 
some other warning flags that are useful in practice. I regularly check 
that this builds cleanly for recent GCC on my platform (Fedora 23, GCC 
5.3.1 20151207 (Red Hat 5.3.1-2)), and occasionally for recent Ubuntu, 
both using default configure-time options.

If you'd like to take up the burden of porting --enable-gcc-warnings to 
other platforms feel free, though my suggestion is to not bother with 
older and/or rarely-used platforms as they have too many bugs in this area.