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Subject[PATCH v2 14/21] kconfig: add CC_IS_CLANG and CLANG_VERSION
Date
This will be useful to describe the clang version dependency.

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

Changes in v2: None

init/Kconfig | 7 +++++++
scripts/clang-version.sh | 24 +++++++++++-------------
2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 923cab5..5998034 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -22,6 +22,13 @@ 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..d8002d2 100755
--- a/scripts/clang-version.sh
+++ b/scripts/clang-version.sh
@@ -10,24 +10,22 @@
# 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"
+ echo "Error: No compiler specified." >&2
+ printf "Usage:\n\t$0 <clang-command>\n" >&2
+ echo 0
+ exit 1
+fi
+
+if !( $compiler --version | grep -q clang) ; then
+ echo "This is not clang." >&2
+ 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
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