Date: Thu, 30 Dec 2010 09:14:45 +0100 From: Roman Divacky <rdivacky@freebsd.org> To: Alexander Best <arundel@freebsd.org> Cc: freebsd-toolchain@freebsd.org Subject: Re: issue with clang and CPUTYPE native Message-ID: <20101230081445.GA99446@freebsd.org> In-Reply-To: <20101230002033.GA23583@freebsd.org> References: <20101227213559.GA53178@freebsd.org> <20101228142203.GA69674@freebsd.org> <20101230002033.GA23583@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Dec 30, 2010 at 12:20:33AM +0000, Alexander Best wrote: > On Tue Dec 28 10, Roman Divacky wrote: > > -march=native in clang works by detecting CPU name > > and passing it (if found) to llvm. if the CPU is not > > detected nothing is passed. > > > > nocona is supported > > > > ie. leaving the CPUNAME empty or specifying it to "nocona" should > > be equivalent to setting it to "native". > > > > > > can you apply this patch: > > > > Index: Driver/Tools.cpp > > =================================================================== > > --- Driver/Tools.cpp (revision 122591) > > +++ Driver/Tools.cpp (working copy) > > @@ -684,6 +684,7 @@ > > // FIXME: We should also incorporate the detected target features for use > > // with -native. > > std::string CPU = llvm::sys::getHostCPUName(); > > + llvm::outs() << "detected CPU = " << CPU << "\n"; > > if (!CPU.empty()) > > CPUName = Args.MakeArgString(CPU); > > } else > > thanks a lot for the patch. i've applied it, but am not sure how to only > compile clang. 'make' in usr.bin/clang fails. do i have to run target > buildworld or is there a way to only build clang? I would guess that cd lib/clang && make && cd ../../usr.bin/clang && make should work, if not - full buildworld is necessary I guess
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20101230081445.GA99446>