That sounds fine to me, but we need to list specific compiler versions. On Fri, Aug 5, 2016 at 2:04 PM, Brett Cannon <br...@python.org> wrote: > Where did we finally land on this discussion? Do we want to update PEP 7 to > say that starting in 3.6 we may use C99 features common to all supported > compilers and list what those compilers are (i.e. gcc, clang, and MSVC)? > > On Wed, 8 Jun 2016 at 01:28 Victor Stinner <victor.stin...@gmail.com> wrote: >> >> I guess that as usual, we should use the "common denominator" of all >> compilers supported by CPython. For example, if MSVC doesn't support a >> feature, we should not use it in CPython. >> >> In practice, it's easy to check if a feature is supported or not: we >> have buildbots building Python at each commit. It was very common to >> get a compilation error only on MSVC when a variable was defined in >> the middle of a function. We are now using >> -Werror=declaration-after-statement with GCC because of MSVC! >> >> Maybe GCC has an option to ask for the subset of the C99 standard >> compatible with MSVC? Something like "-std=c99 -pedantic"? >> >> Note: I tried -pedantic, GCC emits a lot of warnings on code which >> looks valid and/or is protected with #ifdef for features specific to >> GCC like computed goto. >> >> Victor >> >> 2016-06-07 21:45 GMT+02:00 Guido van Rossum <gvanros...@gmail.com>: >> > We should definitely keep supporting MSVC. >> > >> > --Guido (mobile) >> > >> > On Jun 7, 2016 12:39 PM, "Sturla Molden" <sturla.mol...@gmail.com> >> > wrote: >> >> >> >> Victor Stinner <victor.stin...@gmail.com> wrote: >> >> >> >> > Is it worth to support a compiler that in 2016 doesn't support the C >> >> > standard released in 1999, 17 years ago? >> >> >> >> MSVC only supports C99 when its needed for C++11 or some MS extension >> >> to >> >> C. >> >> >> >> Is it worth supporting MSVC? If not, we have Intel C, Clang and Cygwin >> >> GCC >> >> are the viable options we have on Windows (and perhaps Embarcadero, but >> >> I >> >> haven't used C++ builder for a very long time). Even MinGW does not >> >> fully >> >> support C99, because it depends on Microsoft's CRT. If we think MSVC >> >> and >> >> MinGW are worth supporting, we cannot just use C99 indiscriminantly. >> >> >> >> _______________________________________________ >> >> Python-Dev mailing list >> >> Python-Dev@python.org >> >> https://mail.python.org/mailman/listinfo/python-dev >> >> Unsubscribe: >> >> https://mail.python.org/mailman/options/python-dev/guido%40python.org >> > >> > >> > _______________________________________________ >> > Python-Dev mailing list >> > Python-Dev@python.org >> > https://mail.python.org/mailman/listinfo/python-dev >> > Unsubscribe: >> > >> > https://mail.python.org/mailman/options/python-dev/victor.stinner%40gmail.com >> > >> _______________________________________________ >> Python-Dev mailing list >> Python-Dev@python.org >> https://mail.python.org/mailman/listinfo/python-dev >> Unsubscribe: >> https://mail.python.org/mailman/options/python-dev/brett%40python.org
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