Commit 1634b4bc authored by Hans Wennborg's avatar Hans Wennborg
Browse files

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

By Nick Desaulniers!

Differential revision: https://reviews.llvm.org/D65302

llvm-svn: 367158
parent d1b122cb

clang/docs/ReleaseNotes.rst

+33 −0
Original line number Diff line number Diff line
@@ -111,6 +111,12 @@ C Language Changes in Clang 
  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
@@ -242,6 +248,33 @@ 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 <clang-built-linux@googlegroups.com>`_.

- `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

======================