[PATCH v4 25/31] kconfig: add CC_IS_CLANG and CLANG_VERSION

Masahiro Yamada
2018-05-17T06:19:57Z

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>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

init/Kconfig | 7 +++++++
scripts/clang-version.sh | 18 ++++--------------
2 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index c6ac856..3aeb37a 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -16,6 +16,13 @@ config GCC_VERSION
default $(shell, $(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
default 0

+config CC_IS_CLANG
+ def_bool $(success, $(CC) --version | grep -q clang)
+
+config CLANG_VERSION
+ int
+ default $(shell, $(srctree)/scripts/clang-version.sh $(CC))
+
config CONSTRUCTORS
bool
depends on !UML
diff --git a/scripts/clang-version.sh b/scripts/clang-version.sh
index 9780efa..dbf0a31 100755
--- a/scripts/clang-version.sh
+++ b/scripts/clang-version.sh
@@ -10,24 +10,14 @@
# clang-5.0.1 etc.
#

-if [ "$1" = "-p" ] ; then
- with_patchlevel=1;
- shift;
-fi
-
compiler="$*"

-if [ ${#compiler} -eq 0 ]; then
- echo "Error: No compiler specified."
- printf "Usage:\n\t$0 <clang-command>\n"
+if !( $compiler --version | grep -q clang) ; then
+ echo 0
exit 1
fi

MAJOR=$(echo __clang_major__ | $compiler -E -x c - | tail -n 1)
MINOR=$(echo __clang_minor__ | $compiler -E -x c - | tail -n 1)
-if [ "x$with_patchlevel" != "x" ] ; then
- PATCHLEVEL=$(echo __clang_patchlevel__ | $compiler -E -x c - | tail -n 1)
- printf "%02d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
-else
- printf "%02d%02d\\n" $MAJOR $MINOR
-fi
+PATCHLEVEL=$(echo __clang_patchlevel__ | $compiler -E -x c - | tail -n 1)
+printf "%d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
--
2.7.4