[clang][docs][release notes] mention asm goto support

[nickdesaulniers]

Summary

add simple note

[nickdesaulniers]

clang/docs/ReleaseNotes.rst

116 ↗

(On Diff #211843)

I wasn't sure the best way to state something along the lines of "support is in beta shape, plz report bugz?"

[hans]

Thanks!

Do you want to write something more general for the release notes about the status of Clang and the Linux kernel?

clang/docs/ReleaseNotes.rst

116 ↗

(On Diff #211843)

How about starting with "Initial support has been added for ...", and ending with "There are still unsupported corner cases in Clang's integrated assembler and in IfConverter. Please file bugs for any issues you run into." ?

[nickdesaulniers]

• add details about ClangBuiltLinux

[nickdesaulniers]

Thanks for the tips, how does that look @hans ?

[hans]

Looks great!

Go ahead and commit directly to the branch (I think it can only be done with SVN still), or let me know if you'd like me to do it.

clang/docs/ReleaseNotes.rst

255 ↗

(On Diff #212002)

nit: I'd prefer "Clang 9" without the hyphen.

257 ↗

(On Diff #212002)

Clang 4

[nickdesaulniers]

Go ahead and commit directly to the branch (I think it can only be done with SVN still), or let me know if you'd like me to do it.

Thanks again for the review and tips. I was going to ask how does committing work now...

I don't have an SVN checkout; would you be so kind as to please merge this on my behalf?

[hans]

I don't have an SVN checkout; would you be so kind as to please merge this on my behalf?

Committed in r367158.

cfe/branches/release_90/docs/ReleaseNotes.rst

 
 C Language Changes in Clang
 ---------------------------
 
 - ``__FILE_NAME__`` macro has been added as a Clang specific extension supported
   in all C-family languages. This macro is similar to ``__FILE__`` except it
   will always provide the last path component when possible.
 
+- Initial support for ``asm goto`` statements (a GNU C extension) has been
+  added for control flow from inline assembly to labels. The main consumers of
+  this construct are the Linux kernel (CONFIG_JUMP_LABEL=y) and glib. There are
+  still a few unsupported corner cases in Clang's integrated assembler and
+  IfConverter. Please file bugs for any issues you run into.
+
 - ...
 
 C11 Feature Support
 ^^^^^^^^^^^^^^^^^^^
 
 ...
 
 C++ Language Changes in Clang

 
 The following methods have been added:
 
 -  ...
 
 Significant Known Problems
 ==========================
 
+Linux Kernel
+============
+
+With support for asm goto, the mainline Linux kernel for x86_64 is now buildable
+(and bootable) with Clang 9.  Other architectures that don't require
+CONFIG_JUMP_LABEL=y such as arm, aarch64, ppc32, ppc64le, (and possibly mips)
+have been supported with older releases of Clang (Clang 4 was first used with
+aarch64).
+
+The Android and ChromeOS Linux distributions have moved to building their Linux
+kernels with Clang, and Google is currently testing Clang built kernels for
+their production Linux kernels.
+
+Further, LLD, llvm-objcopy, llvm-ar, llvm-nm, llvm-objdump can all be used to
+build a working Linux kernel.
+
+More information about building Linux kernels with Clang can be found:
+
+- `ClangBuiltLinux web page <https://clangbuiltlinux.github.io/>`_.
+- `Issue Tracker <https://github.com/ClangBuiltLinux/linux/issues>`_.
+- `Wiki <https://github.com/ClangBuiltLinux/linux/wiki>`_.
+- `Mailing List <[e-mail]>`_.
+- `Bi-weekly Meeting <https://calendar.google.com/calendar/embed?src=google.com_bbf8m6m4n8nq5p2bfjpele0n5s%40group.calendar.google.com>`_.
+- #clangbuiltlinux on Freenode.
+- `Clang Meta bug <https://bugs.llvm.org/show_bug.cgi?id=4068>`_.
+- `Continuous Integration <https://travis-ci.com/ClangBuiltLinux/continuous-integration>`_.
+
 Additional Information
 ======================
 
 A wide variety of additional information is available on the `Clang web
 page <https://clang.llvm.org/>`_. The web page contains versions of the
 API documentation which are up-to-date with the Subversion version of
 the source code. You can access versions of these documents specific to
 this release by going into the "``clang/docs/``" directory in the Clang
 tree.
 
 If you have any questions or comments about Clang, please feel free to
 contact us via the `mailing
 list <https://lists.llvm.org/mailman/listinfo/cfe-dev>`_.