1 files changed, 80 insertions, 0 deletions
diff --git a/src/spdk/scripts/detect_cc.sh b/src/spdk/scripts/detect_cc.sh
new file mode 100755
index 00000000..936520e3
--- /dev/null
+++ b/src/spdk/scripts/detect_cc.sh
@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+set -e
+
+function err()
+{
+	echo "$@" >&2
+}
+
+function usage()
+{
+	err "Detect compiler and linker versions, generate mk/cc.mk"
+	err ""
+	err "Usage: ./detect_cc.sh [OPTION]..."
+	err ""
+	err "Defaults for the options are specified in brackets."
+	err ""
+	err "General:"
+	err " -h, --help                Display this help and exit"
+	err " --cc=path                 C compiler to use"
+	err " --cxx=path                C++ compiler to use"
+	err " --lto=[y|n]               Attempt to configure for LTO"
+
+}
+
+CC=cc
+CXX=c++
+LTO=n
+
+for i in "$@"; do
+	case "$i" in
+		-h|--help)
+			usage
+			exit 0
+			;;
+		--cc=*)
+			CC="${i#*=}"
+			;;
+		--cxx=*)
+			CXX="${i#*=}"
+			;;
+		--lto=*)
+			LTO="${i#*=}"
+			;;
+		--)
+			break
+			;;
+		*)
+			err "Unrecognized option $i"
+			usage
+			exit 1
+	esac
+done
+
+CC_TYPE=$($CC -v 2>&1 | grep -o -E '\w+ version' | head -1 | awk '{ print $1 }')
+CXX_TYPE=$($CXX -v 2>&1 | grep -o -E '\w+ version' | head -1 | awk '{ print $1 }')
+LD_TYPE=$(ld -v 2>&1 | awk '{print $2}')
+
+if [ "$CC_TYPE" != "$CXX_TYPE" ]; then
+	err "C compiler is $CC_TYPE but C++ compiler is $CXX_TYPE"
+	err "This may result in errors"
+fi
+
+CCAR="ar"
+if [ "$LTO" = "y" ]; then
+	if [ "$CC_TYPE" = "clang" ]; then
+		if [ "$LD_TYPE" != "gold" ]; then
+			err "Using LTO with clang requires the gold linker."
+			exit 1
+		fi
+		 CCAR="llvm-ar"
+	else
+		CCAR="gcc-ar"
+	fi
+fi
+
+echo "CC?=$CC"
+echo "CXX?=$CXX"
+echo "CCAR=$CCAR"
+echo "CC_TYPE=$CC_TYPE"