Re: HEADS UP: Updated llvm/clang to 3.4 in r261991
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On Sun, 16 Feb 2014 21:06:58 +0100
Dimitry Andric <dim@FreeBSD.org> wrote:
> Hi,
>=20
> I have just upgraded our copy of llvm/clang to 3.4 release, in r261991.
> This version supports all of the features in the current working draft
> of the upcoming C++ standard, provisionally named C++1y.
>=20
> The code generator's performance is greatly increased, and the loop
> auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The
> PowerPC backend has made several major improvements to code generation
> quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
> backends have all seen major feature work.
>=20
> Release notes for llvm and clang can be found here:
> <http://llvm.org/releases/3.4/docs/ReleaseNotes.html>
> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>
>=20
> Note that building lldb (using WITH_LLDB) will not work at this point,
> since our lldb snapshot was locally modified to be able to work with the
> old llvm 3.3 API. Ed Maste will most likely fix this very soon (and
> maybe import a new snapshot, I hope :-).
>=20
> Another important aspect for end-users and ports maintainers is the new
> compiler flag handling in clang 3.4. It has become more strict, in the
> sense that it will now error out on flags it does not recognize, in
> particular most gcc-specific optimization fine-tuning flags.
>=20
> Some ports which blindly use such gcc-specific flags will therefore be
> broken, but these are usually very easy to fix. During the exp-run
> which was done with this new version of clang, several ports with the
> highest number of dependent ports (open-motif, libtheora, boost-libs,
> etc) have already been handled, but more work still needs to be done.
>=20
> Last but not least, I hope we can now start using clang for more of our
> existing architectures, like powerpc, mips, and possibly even new ones
> like arm64. Enjoy!
>=20
> -Dimitry
>=20
Dimitry,
I want to say thank you and the Mannschaft for the work you've done.=20
Regards,
Oliver
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