8:33 p.m.
On Fri, 2019-09-13 at 16:17 -0300, Mauro Carvalho Chehab wrote:
Em Fri, 13 Sep 2019 11:42:38 -0700
Joe Perches <joe(a)perches.com> escreveu:
[]
> Just fyi: for an x86-64 defconfig with gcc 8.3
>
> $ { make clean ; make defconfig ; make -j4 W=1 ; } > make.log 2>&1
>
> There are ~300 W=1 for non kernel-doc -W<foo> warnings.
>
> $ grep -i -P -oh '\[\-W[\w\-]+\]' make.log |sort | uniq -c | sort -rn
> 163 [-Wmissing-prototypes]
> 69 [-Wunused-but-set-variable]
> 16 [-Wempty-body]
> 10 [-Wtype-limits]
> 6 [-Woverride-init]
> 2 [-Wstringop-truncation]
> 2 [-Wcast-function-type]
> 1 [-Wunused-but-set-parameter]
On my eyes, it doesn't sound too much.
In general, I agree and most of these are pretty
trivial to remove. It'd just take some time to
remove most of the missing-prototypes and
unused-but-set warnings before being able to
enable the warnings at the default W=0.
I suspect that,
with gcc-9, it should produce more warnings, though.
It doesn't though.
At least not so far as I can tell.
gcc-9.1 produces the same output.
$ { make clean ; make defconfig ; make CC=/usr/bin/gcc-9 -j4 W=1 V=1 ; } >
make_gcc9.log 2>&1
$ grep -i -P -oh '\[\-W[\w\-]+\]' make_gcc9.log | sort | uniq -c | sort -rn
163 [-Wmissing-prototypes]
69 [-Wunused-but-set-variable]
16 [-Wempty-body]
10 [-Wtype-limits]
6 [-Woverride-init]
2 [-Wstringop-truncation]
2 [-Wcast-function-type]
1 [-Wunused-but-set-parameter]