Date: Mon, 10 Sep 2012 17:22:37 -0400 (EDT) From: Daniel Eischen <deischen@freebsd.org> To: toolchain@freebsd.org Cc: current@freebsd.org Subject: Re: Clang as default compiler November 4th Message-ID: <Pine.GSO.4.64.1209101718570.16426@sea.ntplx.net> In-Reply-To: <20120910211207.GC64920@lor.one-eyed-alien.net> References: <20120910211207.GC64920@lor.one-eyed-alien.net>
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On Mon, 10 Sep 2012, Brooks Davis wrote: > [Please confine your replies to toolchain@freebsd.org to keep the thread > on the most relevant list.] > > For the past several years we've been working towards migrating from > GCC to Clang/LLVM as our default compiler. We intend to ship FreeBSD > 10.0 with Clang as the default compiler on i386 and amd64 platforms. To > this end, we will make WITH_CLANG_IS_CC the default on i386 and amd64 > platforms on November 4th. > > What does the mean to you? > > * When you build world after the default is changed /usr/bin/cc, cpp, and > c++ will be links to clang. > > * This means the initial phase of buildworld and "old style" kernel > compilation will use clang instead of gcc. This is known to work. > > * It also means that ports will build with clang by default. A major > of ports work, but a significant number are broken or blocked by > broken ports. For more information see: > http://wiki.freebsd.org/PortsAndClang > > What issues remain? > > * The gcc->clang transition currently requires setting CC, CXX, and CPP > in addition to WITH_CLANG_IS_CC. I will post a patch to toolchain@ > to address this shortly. I assume this will be done, tested and committed before 2012-11-04 (or whenever the switchover date is). > > * Ports compiler selection infrastructure is still under development. This should be a prerequisite before making the switch, given that ports will be broken without a work-around for building them with gcc. -- DE
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