On Thu, 07.04.2011 at 07:31:14 +0000, Alexander Best wrote: > On Wed Apr 6 11, Warner Losh wrote: > > On Apr 6, 2011, at 3:41 PM, Alexander Best wrote: > > > On Wed Apr 6 11, Juli Mallett wrote: > > >> On Wed, Apr 6, 2011 at 14:04, Alexander Best <arun...@freebsd.org> wrote: > > >>> On Wed Apr 6 11, Ulrich Spoerlein wrote: > > >>>> Author: uqs > > >>>> Date: Wed Apr 6 20:08:23 2011 > > >>>> New Revision: 220401 > > >>>> URL: http://svn.freebsd.org/changeset/base/220401 > > >>>> > > >>>> Log: > > >>>> Complete WITHOUT_CXX support. It implies WITHOUT_GROFF and > > >>>> WITHOUT_CLANG. > > >>> > > >>> is there no way to build clang/llvm without CXX support? > > >> > > >> Clang and LLVM are written in C++. Even if their support for > > >> compiling C++ could be disabled, you'd still need a C++ cross-compiler > > >> to build them, which ought to be disabled by WITHOUT_CXX, right? > > > > > > good point. is it even possible to build a world *with* C++ support, if > > > the > > > installed world *doesn't* have C++ support? is the C++ part of gcc > > > written in > > > C? if that's the case it's possible. > > > > Yes. We don't need c++ to bootstrap g++ or anything else in the base > > system. Once we build the compilers, we can build the c++ that's in the > > tree.
While technically true, that c++ (the binary) is not needed, our g++ requires gperf(1) to build, which is written in C++. So we need gperf + C compiler to bootstrap. How the gperf binary comes into existence on the host system is someone else's problem :) > however that means that FreeBSD can never get rid of gcc. so clang can never > become the main and only base compiler. Not quite true, right now the host system (whatever that is) needs a working C compiler plus a whole lot of other stuff. With clang the host system needs a C++ compiler + lots of other stuff. I haven't tested any other compilers, but gcc and/or clang might also build with the Sun compilers, for example. Cheers, Uli _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"