On Dec 18, 2014, at 5:02, Dimitry Andric <dim_at_FreeBSD.org> wrote: > On 18 Dec 2014, at 02:17, NGie Cooper <yaneurabeya_at_gmail.com> wrote: >> >> On Fri, Nov 28, 2014 at 1:03 PM, Dimitry Andric <dim_at_freebsd.org> wrote: > ... >> As a request to speed up the build process further, >> - Would it be [easily] possible in the clang35 branch to bootstrap >> the compiler for a specific architecture? The bootstrap / cross >> compiler for instance always builds N targets instead of building just >> the desired TARGET/TARGET_ARCH combo. > > It's not very easy, at least not without breaking various parts of our > fragile build system, but I surely want to put something like this on > the TODO list for *after* the import has completed. > > The branch is making progress right now, and I would not want to > complicate matters further by introducing yet another tricky feature. :) Fair enough :). >> - Could a "MK_CLANG_ALL_TARGETS" or something similar option be >> added to src.opts.mk to fine tune this process for those of us who >> don't want to build a cross-compile toolchain every iteration for our >> target MACHINE/MACHINE_ARCH? > > I would be fine with something like this, as long as it is turned off by > default, or if it is only used for the bootstrap stages. It is actually > an extremely useful feature of clang that you can target multiple > architectures with one compiler binary. Yes. If make tinderbox could use this it would be useful, otherwise, for most folks it seems like a less interesting feature. > A more interesting case would be to remodel the build system so it can > use one toolchain (external, or pkg-ng'd, maybe?) for building an entire > universe. With clang, that should be relatively easy to do. Agreed. bdrewery is working on something similar to that internally for Isilon. Building the same toolchain N times internally when building the system and your upstream revision of FreeBSD doesn’t change is like testing your sanity — not much changes with the bootstrap compiler/toolchain then! Thanks for the reply :)!
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