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-rwxr-xr-xscripts/cc-version.sh72
1 files changed, 72 insertions, 0 deletions
diff --git a/scripts/cc-version.sh b/scripts/cc-version.sh
new file mode 100755
index 000000000..2401c86fc
--- /dev/null
+++ b/scripts/cc-version.sh
@@ -0,0 +1,72 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Print the C compiler name and its version in a 5 or 6-digit form.
+# Also, perform the minimum version check.
+
+set -e
+
+# Print the C compiler name and some version components.
+get_c_compiler_info()
+{
+ cat <<- EOF | "$@" -E -P -x c - 2>/dev/null
+ #if defined(__clang__)
+ Clang __clang_major__ __clang_minor__ __clang_patchlevel__
+ #elif defined(__INTEL_COMPILER)
+ ICC __INTEL_COMPILER __INTEL_COMPILER_UPDATE
+ #elif defined(__GNUC__)
+ GCC __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__
+ #else
+ unknown
+ #endif
+ EOF
+}
+
+# Convert the version string x.y.z to a canonical 5 or 6-digit form.
+get_canonical_version()
+{
+ IFS=.
+ set -- $1
+ echo $((10000 * $1 + 100 * $2 + $3))
+}
+
+# $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc".
+orig_args="$@"
+set -- $(get_c_compiler_info "$@")
+
+name=$1
+
+min_tool_version=$(dirname $0)/min-tool-version.sh
+
+case "$name" in
+GCC)
+ version=$2.$3.$4
+ min_version=$($min_tool_version gcc)
+ ;;
+Clang)
+ version=$2.$3.$4
+ min_version=$($min_tool_version llvm)
+ ;;
+ICC)
+ version=$(($2 / 100)).$(($2 % 100)).$3
+ min_version=$($min_tool_version icc)
+ ;;
+*)
+ echo "$orig_args: unknown C compiler" >&2
+ exit 1
+ ;;
+esac
+
+cversion=$(get_canonical_version $version)
+min_cversion=$(get_canonical_version $min_version)
+
+if [ "$cversion" -lt "$min_cversion" ]; then
+ echo >&2 "***"
+ echo >&2 "*** C compiler is too old."
+ echo >&2 "*** Your $name version: $version"
+ echo >&2 "*** Minimum $name version: $min_version"
+ echo >&2 "***"
+ exit 1
+fi
+
+echo $name $cversion