fix clang issues with -lgcc check

scripts/scan-tools.sh

@@ -5,6 +5,7 @@ shopt -s extglob
 topdir=$(pwd)
 opath=$PATH
 out=0
+clang=0
 
 if [[ $NO_ERROR != @(0|1) ]]; then
 	echo Please do not invoke this script directly!
@@ -60,6 +61,7 @@ OpenBSD)
 	fi
 	;;
 Darwin*)
+	clang=1
 	;;
 *)
 	# unsupported
@@ -96,15 +98,20 @@ cat >test.c <<-'EOF'
 		return (0);
 	}
 EOF
-X=$($makecmd ADK_TOPDIR=$topdir LDADD=-lgcc 2>&1)
-if [[ $X != *@(Native compiler works)* ]]; then
+if [[ $clang -eq 0 ]]; then
+  X=$($makecmd ADK_TOPDIR=$topdir LDADD=-lgcc 2>&1)
+  if [[ $X != *@(Native compiler works)* ]]; then
 	echo Cannot compile with shared libgcc use static one.
 	HOST_CFLAGS=-static-libgcc
 	echo "HOST_CFLAGS:=-O0 -g0 -static-libgcc" >> $topdir/prereq.mk
 	echo "HOST_CXXFLAGS:=-O0 -g0 -static-libgcc" >> $topdir/prereq.mk
-else
+  else
 	echo "HOST_CFLAGS:=-O0 -g0" >> $topdir/prereq.mk
 	echo "HOST_CXXFLAGS:=-O0 -g0" >> $topdir/prereq.mk
+  fi
+else
+  echo "HOST_CFLAGS:=-O0 -g0" >> $topdir/prereq.mk
+  echo "HOST_CXXFLAGS:=-O0 -g0" >> $topdir/prereq.mk
 fi
 
 X=$($makecmd ADK_TOPDIR=$topdir HOST_CFLAGS=${HOST_CFLAGS} 2>&1)