+LDLIBS ?= -lm -lgc
+
+NEED_LIBUNWIND := YesPlease
+uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
+ifeq ($(uname_S),Darwin)
+ NEED_LIBUNWIND :=
+endif
+
+clang_check := $(shell sh -c '$(CC) -v 2>&1 | grep -q clang; echo $$?')
+ifeq ($(clang_check), 0)
+ CFLAGS += -Qunused-arguments
+endif
+ifdef NEED_LIBUNWIND
+ LDLIBS += -lunwind
+endif