Write rb_mem_clear in Rust

This makefile hackery is ridiculous but whatever, it works!

.gitignore

@@ -30,6 +30,7 @@
 .pc
 .ppack
 .svn
+!./Makefile
 Makefile
 Makefile.old
 cygruby*.def

Makefile

@@ -552,3 +552,11 @@ un-runnable:
 	$(Q) exit 1
 
 distclean-local::; @$(RM) GNUmakefile uncommon.mk
+
+array.c:
+
+array.o: rubyarray.c rarray.rs
+	rustc rarray.rs --crate-type=staticlib -Cpanic=abort
+	@$(ECHO) compiling $<
+	@$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c $<
+	ld -r rubyarray.o librarray.a -o array.o

rarray.rs

@@ -0,0 +1,35 @@
+#![no_std]
+#![feature(lang_items)]
+
+#![feature(libc)]
+extern crate libc;
+
+pub type Value = libc::uintptr_t;
+
+#[allow(non_upper_case_globals)]
+static Qnil: libc::uintptr_t = 0x08 as libc::uintptr_t;
+
+#[no_mangle]
+pub unsafe extern fn rb_mem_clear(mut mem: *mut Value, mut size: libc::c_long) {
+    while size != 0 {
+        size -= 1;
+        *mem = Qnil;
+
+        mem = mem.offset(1);
+    }
+}
+
+use core::fmt;
+
+#[lang = "eh_personality"]
+#[no_mangle]
+pub extern fn eh_personality() {
+}
+
+#[lang = "panic_fmt"]
+#[no_mangle]
+pub extern fn rust_begin_panic(_: fmt::Arguments,
+                               _: &'static str,
+                               _: u32) -> ! {
+    loop {}
+}

array.c → rubyarray.c

@@ -131,14 +131,6 @@ static ID id_cmp, id_div, id_power;
 
 #define ARY_SET(a, i, v) RARRAY_ASET((assert(!ARY_SHARED_P(a)), (a)), (i), (v))
 
-void
-rb_mem_clear(register VALUE *mem, register long size)
-{
-    while (size--) {
-	*mem++ = Qnil;
-    }
-}
-
 static void
 ary_mem_clear(VALUE ary, long beg, long size)
 {