Fix c-to-rust on OSX

c-to-rust/Makefile

@@ -1,3 +1,9 @@
+ifeq ($(shell uname),Darwin)
+    LDFLAGS := -Wl,-dead_strip
+else
+    LDFLAGS := -Wl,--gc-sections -lpthread
+endif
+
 all: target/double
 	target/double
 
@@ -5,7 +11,7 @@ target:
 	mkdir -p $@
 
 target/double: target/main.o target/libdouble_input.a
-	$(CC) -o $@ -Wl,--gc-sections $^ -lpthread
+	$(CC) -o $@ $(LDFLAGS) $^
 
 target/libdouble_input.a: src/lib.rs Cargo.toml
 	cargo build