Commit 469cb737 ("kconfig: add CC_IS_CLANG and CLANG_VERSION")
changed the code, but missed to update the comment block.

The -p option was gone, and the output is 5-digit (or 6-digit when
Clang 10 is released).

Update the comment now.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

Some shells use !(pattern|...|pattern) to match file names not
containing the specified patterns. This may result in output like

  $ ./scripts/clang-version.sh gcc
  ./scripts/clang-version.sh[18]: COPYING: not found
  printf: %d __clang_major__: conversion error
  printf: %d __clang_minor__: conversion error
  printf: %d __clang_patchlevel__: conversion error
  00000
  $

and set CONFIG_CLANG_VERSION to the invalid value '00000'.

POSIX says[0]

  If the pipeline begins with the reserved word ! and command1 is a
  subshell command, the application shall ensure that the ( operator at
  the beginning of command1 is separated from the ! by one or more
  <blank> characters. The behavior of the reserved word ! immediately
  followed by the ( operator is unspecified.

So, just add a <blank> to prevent this.

[0] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_09_02



Signed-off-by: Michael Forney <mforney@mforney.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

This will be useful to describe the clang version dependency.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>

Based on gcc-version.sh, clang-version.sh prints out the correct
version of clang.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>