Added Cilk runtime library (libcilkrts) into GCC.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204173 138bc75d-0d04-0410-961f-82ee72b054a4

configure

@@ -2772,6 +2772,7 @@ target_libraries="target-libgcc \
 		target-libgloss \
 		target-newlib \
 		target-libgomp \
+		target-libcilkrts \
 		target-libatomic \
 		target-libitm \
 		target-libstdc++-v3 \
@@ -3164,6 +3165,25 @@ $as_echo "yes" >&6; }
     fi
 fi
 
+# Disable libcilkrts on unsupported systems.
+if test -d ${srcdir}/libcilkrts; then
+    if test x$enable_libcilkrts = x; then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libcilkrts support" >&5
+$as_echo_n "checking for libcilkrts support... " >&6; }
+	if (srcdir=${srcdir}/libcilkrts; \
+		. ${srcdir}/configure.tgt; \
+		test -n "$UNSUPPORTED")
+	then
+	    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+	    noconfigdirs="$noconfigdirs target-libcilkrts"
+	else
+	    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+	fi
+    fi
+fi
+
 # Disable libitm on unsupported systems.
 if test -d ${srcdir}/libitm; then
     if test x$enable_libitm = x; then