Can gcc itself be tested with ubsan? If so, how?

[Eric Gallager]

On Tue, Sep 28, 2021 at 2:48 AM Toon Moene <toon@moene.org> wrote:
>
> On 9/28/21 8:35 AM, Erick Ochoa via Gcc wrote:
>
> >> Can ubsan be used on the compiler itself?
>
> I regularly build the compiler(s) natively with ubsan enabled, see for
> instance:
>
> https://gcc.gnu.org/pipermail/gcc-testresults/2021-September/719448.html
>
> The configure line tells you how to do it (towards the end of the mail):
>
> configure flags: --prefix=/home/toon/compilers/install/gcc --with-gnu-as
> --with-gnu-ld --enable-languages=all,ada --disable-multilib
> --disable-nls --with-build-config=bootstrap-ubsan --enable-checking=all
>

To elaborate on that, to see what the --with-build-config=bootstrap-ubsan
configure flag does, you can check the file config/bootstrap-ubsan.mk

> (the enable-checking part is not relevant, and can be omitted).
>
> Kind regards,
>
> --
> Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
> Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands