Date: Fri, 7 Jul 2023 00:15:20 +0200 From: Dimitry Andric <dim@FreeBSD.org> To: Nuno Teixeira <eduardo@freebsd.org> Cc: FreeBSD Mailing List <freebsd-ports@freebsd.org> Subject: Re: Removing unneeded USES=compiler:c11 (?) Message-ID: <1BB45BF0-8947-4F95-87B8-227BEED2EE07@FreeBSD.org> In-Reply-To: <CAFDf7ULY3MkGEtm1_auU1G70Vt5kcHNseKH5mSS6CwE5tih9wA@mail.gmail.com> References: <CAFDf7ULY3MkGEtm1_auU1G70Vt5kcHNseKH5mSS6CwE5tih9wA@mail.gmail.com>
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On 6 Jul 2023, at 22:41, Nuno Teixeira <eduardo@freebsd.org> wrote:
>=20
> Could USES=3Dcompiler:c11 be removed from ports presuming that =
available compilers support c11? (Do they ?)
There are probably older versions of gcc and clang that don't support =
C11 yet, but I think all recent versions do. But it couldn't hurt to =
leave this in, I guess.
This does not automatically mean that -std=3Dc11 is added to the C =
compiler command line, for that you have to specify USE_CSTD=3Dc11 in =
the port Makefile.
> I'm confused because some aws CMakeLists.txt have:
>=20
> if(NOT CMAKE_CXX_STANDARD)
> set(CMAKE_CXX_STANDARD 11)
> endif()
>=20
> But c++11 have nothing to do with c11 (for what wikipedia says)....
Yes, that is only specifying for some CMake files that if the end-user =
does not explicitly specify a C++ standard, it will use C++11. In =
practice, this will put -std=3Dc++11 on the C++ compiler =
(${CMAKE_CXX_COMPILER}) command line.
For ports you can achieve the same result by adding USE_CXXSTD=3Dc++11 =
in the port Makefile.
-Dimitry
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