[PATCH 0/4] add first LLVM/clang support

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

We can't compile all of barebox with clang yet, because we use
GCC-specific extensions, especially C-code in naked functions, which we
is judiciously used on 32-bit ARM platforms.

Nevertheless, sandbox can already be used with clang and it's useful for
incoming support for libfuzzer, so let's add support to Kbuild.

Ahmad Fatoum (4):
  sandbox: use host system's UBSan library
  common: implement CC_IS_GCC and CC_IS_CLANG symbols
  fixdep: sync with Linux
  Makefile: add LLVM/clang support

 Makefile                 |  45 ++++--
 arch/arm/Kconfig         |   3 +-
 arch/sandbox/Makefile    |   4 +
 common/Kconfig           |  16 +++
 lib/Kconfig.ubsan        |   3 +
 lib/Makefile             |   2 +-
 scripts/Kbuild.include   |  31 ++--
 scripts/Kconfig.include  |   6 +
 scripts/Makefile.build   |   8 +-
 scripts/Makefile.clang   |   9 ++
 scripts/Makefile.ubsan   |  33 +++--
 scripts/basic/Makefile   |   2 +
 scripts/basic/fixdep.c   | 297 ++++++++++++++++++++++++---------------
 scripts/cc-version.sh    |  52 +++++++
 scripts/compiler.h       |  20 +--
 scripts/include/xalloc.h |  34 +++++
 scripts/mod/sumversion.c |  19 ++-
 17 files changed, 411 insertions(+), 173 deletions(-)
 create mode 100644 scripts/Makefile.clang
 create mode 100755 scripts/cc-version.sh
 create mode 100644 scripts/include/xalloc.h

-- 
2.39.5