| Newsgroups |
gmane.comp.lib.newlib |
| Organization |
Systematic Software |
| Message-ID |
<[email protected]> |
On 2024-01-20 11:17, [email protected] wrote:
> On 2024-01-19 05:55, Corinna Vinschen wrote:
>> if you saw my today's pushes, you're aware that I only found a bug
>> because I used -Wall. I fixed the bug and a few less crucial warnings.
>> I did NOT fix the warnings in code we took verbatim from some BSDs,
>> which often contain unused variables, or in some cases expressions which
>> are deemed to profit from extra paranthesis, e. g.
>> if (a >= 0 ^ b == 0)
>> For that reason, I'd like to suggest to add -Wall by default to the
>> build flags for newlib, just as it is already for ages in the Cygwin
>> tree.
>> Anybody having a strong opinion, pro or contra?
> ++
> I also like:
> -Wextra -Wformat=2 -Wformat-overflow=2 -Werror=format-security
> to get more useful warnings, and error if there are security issues like totally
> variable format strings; use `info gcc W...` for descriptions; YL/100kmMV
> I have also found the following work well for development with recent gcc:
> -fanalyzer -fsanitize-recover=all
> -fstack-check -fstack-protector-all
> --param=ssp-buffer-size=4
> but may be inappropriate for production builds; use `info gcc f...` for
> descriptions.
Linux added -Wstringop-overflow to diagnose provable buffer overflows, except
with GCC == 11 which mishandles the test:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=610347effc2ecb5ededf5037e82240b151f883ab
For extra Linux warning flags W=1/2/3 available see:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/scripts/Makefile.extrawarn
--
Take care. Thanks, Brian Inglis Calgary, Alberta, Canada
La perfection est atteinte Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry