C++ version for GCC development

[Abdullah Siddiqui]

Hello Jonathan.

Thank you again 🙂.

Regards,
Abdullah.

On Fri, Mar 4, 2022, 4:13 AM Jonathan Wakely, <jwakely.gcc@gmail.com> wrote:

> On Fri, 4 Mar 2022 at 03:07, Abdullah Siddiqui
> <siddiquiabdullah92@gmail.com> wrote:
> >
> > Hello Jonathan.
> >
> > Thank you for the detailed clarification.
> >
> >> > At what point did the GCC developers give up C++98 and start using
> C++11?
> >
> >
> >> For GCC 11. This is stated at
> https://gcc.gnu.org/install/prerequisites.html
> >
> >
> > Are you referring to these lines:
> >
> >> ISO C++11 compiler
> >> Necessary to bootstrap GCC.
> >>
> >>  Versions of GCC prior to 11 also allow bootstrapping with an ISO C++98
> compiler,.....
>
> Yes, those lines.
>
> >
> > I thought bootstrapping and compilation are two separate things. In this
> context, are bootstrapping and compilation the same i.e. GCC is a compiler
> and the ISO C++11 compiler is being used to compile GCC?
>
> Yes, that's right.
>
> In this context bootstrapping GCC means building it from source (which
> includes compilation but also linking, and then repeating the whole
> process using the just-built GCC to build itself again).
>
> Since GCC 11, the first stage where you build GCC with a pre-existing
> compiler must be done with a C++11 compiler. Before GCC 11 a C++98
> compiler was needed.
>
> >
> >> The exceptions are some tests which have .c extensions but get
> >> compiled as both C and C++, when we want to test that both language
> >> front-ends pass the test.
> >
> >
> > Are you referring to files in the testsuite folders (example:
> gcc/testsuite/g++.dg/lto/pr65302_1.C)?
>
> See Xi Ruoyao's answer.
>