Date: Thu, 20 Dec 2007 08:01:27 -0500 From: Alexander Kabaev <kabaev@gmail.com> Cc: current@freebsd.org Subject: Re: WARNS=3 and C++ on 8.x Message-ID: <20071220080127.2e0a5a1b@kan.dnsalias.net> In-Reply-To: <200712191949.43414.mi%2Bmill@aldan.algebra.com> References: <200712191949.43414.mi%2Bmill@aldan.algebra.com>
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--Sig_/Wbn=UgdrFY4H/Pd82MAXMBw Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 19 Dec 2007 19:49:43 -0500 Mikhail Teterin <mi+mill@aldan.algebra.com> wrote: > Hello! >=20 > The graphics/libfpx port can not currently be built on 8.x, because > the WARNS=3D3, which is set in files/Makefile.bsd triggers > -Wsystem-headers. >=20 > That setting triggers the following warning: >=20 > In file included from /usr/include/c++/4.2/ios:50, > from /usr/include/c++/4.2/ostream:45, > from /usr/include/c++/4.2/iostream:45, > from /work/a/ports/graphics/libfpx/work/libfpx-1.2.0.12/= ole/olestorg.cpp:20: > /usr/include/c++/4.2/bits/basic_ios.h: In member function 'void > std::basic_ios<_CharT, > _Traits>::_M_setstate(std::_Ios_Iostate)': /usr/include/c++/4.2/bits/basi= c_ios.h:156: > warning: empty body in an if-statement >=20 > The port builds fine on 7.x and 6.x. Could the 8.x, please, be fixed? > I mean, the setting, pretty much, assures, that ALL C++ software can't > be built (with WARNS=3D3, that is), because almost everything uses > iostream. >=20 > Thanks! >=20 > -mi The code below is from /usr/include/c++/4.2/exception_defines.h and as you can see, WARNS3 alone is not enough, -fno-exceptions has to be on the command line too, something you forgot to mention. There's nothing to fix in FreeBSD itself, the change should go into vendor sources.=20 #ifndef __EXCEPTIONS // Iff -fno-exceptions, transform error handling code to work without it. # define try if (true) # define catch(X) if (false) # define __throw_exception_again #else // Else proceed normally. # define __throw_exception_again throw #endif --=20 Alexander Kabaev --Sig_/Wbn=UgdrFY4H/Pd82MAXMBw Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHamenQ6z1jMm+XZYRAsHTAJ9+34WGI/UGj0KudJLYcEbPkC8H5wCfVhW1 dCy4RYKBevLsVbrLYw1BSPg= =gtR2 -----END PGP SIGNATURE----- --Sig_/Wbn=UgdrFY4H/Pd82MAXMBw--
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