diff --git a/mk/target.mk b/mk/target.mk
index 293f134fb44dc..2b9996fb98dd9 100644
--- a/mk/target.mk
+++ b/mk/target.mk
@@ -54,18 +54,22 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_RUNTIME_$(2)): \
 	@$$(call E, cp: $$@)
 	$$(Q)cp $$< $$@
 
+# SNAP a5fa1d9 remove this after the stage0 snapshot from rules below
+ifeq ($(1),0)
+LFLAGS_$(1)_$(2)_$(3) := -L $$(TLIB$(1)_T_$(2)_H_$(3))
+else
+LFLAGS_$(1)_$(2)_$(3) :=
+endif
+
 $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_STDLIB_$(2)): \
 		$$(STDLIB_CRATE) $$(STDLIB_INPUTS) \
 		$$(TSREQ$(1)_T_$(2)_H_$(3)) \
 		| $$(TLIB$(1)_T_$(2)_H_$(3))/
 	@$$(call E, compile_and_link: $$@)
-ifeq ($(1),0)
-	$$(Q)cp $(3)/stage0/$(CFG_LIBDIR)/rustlib/$(2)/$(CFG_LIBDIR)/* \
-		$(3)/stage0/$(CFG_LIBDIR)/rustc/$(2)/$(CFG_LIBDIR)/
-endif
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(STDLIB_GLOB_$(2)),$$(notdir $$@))
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(STDLIB_RGLOB_$(2)),$$(notdir $$@))
-	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) --out-dir $$(@D) $$< && touch $$@
+	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) $$(LFLAGS_$(1)_$(2)_$(3)) \
+		--out-dir $$(@D) $$< && touch $$@
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(STDLIB_GLOB_$(2)),$$(notdir $$@))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(STDLIB_RGLOB_$(2)),$$(notdir $$@))
 
@@ -75,13 +79,10 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_EXTRALIB_$(2)): \
 		$$(TSREQ$(1)_T_$(2)_H_$(3)) \
 		| $$(TLIB$(1)_T_$(2)_H_$(3))/
 	@$$(call E, compile_and_link: $$@)
-ifeq ($(1),0)
-	$$(Q)cp $(3)/stage0/$(CFG_LIBDIR)/rustlib/$(2)/$(CFG_LIBDIR)/* \
-		$(3)/stage0/$(CFG_LIBDIR)/rustc/$(2)/$(CFG_LIBDIR)/
-endif
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(EXTRALIB_GLOB_$(2)),$$(notdir $$@))
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(EXTRALIB_RGLOB_$(2)),$$(notdir $$@))
-	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) --out-dir $$(@D) $$< && touch $$@
+	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) $$(LFLAGS_$(1)_$(2)_$(3)) \
+		--out-dir $$(@D) $$< && touch $$@
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(EXTRALIB_GLOB_$(2)),$$(notdir $$@))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(EXTRALIB_RGLOB_$(2)),$$(notdir $$@))
 
@@ -98,6 +99,7 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_LIBRUSTUV_$(2)): \
 	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) \
 		-L $$(UV_SUPPORT_DIR_$(2)) \
 		-L $$(dir $$(LIBUV_LIB_$(2))) \
+		$$(LFLAGS_$(1)_$(2)_$(3)) \
 		--out-dir $$(@D) $$< && touch $$@
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBRUSTUV_GLOB_$(2)),$$(notdir $$@))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBRUSTUV_RGLOB_$(2)),$$(notdir $$@))
@@ -111,6 +113,7 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_LIBGREEN_$(2)): \
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBGREEN_GLOB_$(2)),$$(notdir $$@))
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBGREEN_RGLOB_$(2)),$$(notdir $$@))
 	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) \
+		$$(LFLAGS_$(1)_$(2)_$(3)) \
 		--out-dir $$(@D) $$< && touch $$@
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBGREEN_GLOB_$(2)),$$(notdir $$@))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBGREEN_RGLOB_$(2)),$$(notdir $$@))
@@ -124,6 +127,7 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_LIBNATIVE_$(2)): \
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBNATIVE_GLOB_$(2)),$$(notdir $$@))
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBNATIVE_RGLOB_$(2)),$$(notdir $$@))
 	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) \
+		$$(LFLAGS_$(1)_$(2)_$(3)) \
 		--out-dir $$(@D) $$< && touch $$@
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBNATIVE_GLOB_$(2)),$$(notdir $$@))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBNATIVE_RGLOB_$(2)),$$(notdir $$@))
@@ -135,13 +139,11 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_LIBSYNTAX_$(3)): \
 		$$(TEXTRALIB_DEFAULT$(1)_T_$(2)_H_$(3)) \
 		| $$(TLIB$(1)_T_$(2)_H_$(3))/
 	@$$(call E, compile_and_link: $$@)
-ifeq ($(1),0)
-	$$(Q)cp $(3)/stage0/$(CFG_LIBDIR)/rustlib/$(2)/$(CFG_LIBDIR)/* \
-		$(3)/stage0/$(CFG_LIBDIR)/rustc/$(2)/$(CFG_LIBDIR)/
-endif
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBSYNTAX_GLOB_$(2)),$$(notdir $$@))
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBSYNTAX_RGLOB_$(2)),$$(notdir $$@))
-	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) $(BORROWCK) --out-dir $$(@D) $$< && touch $$@
+	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) $(BORROWCK) \
+	    $$(LFLAGS_$(1)_$(2)_$(3)) \
+	    --out-dir $$(@D) $$< && touch $$@
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBSYNTAX_GLOB_$(2)),$$(notdir $$@))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBSYNTAX_RGLOB_$(2)),$$(notdir $$@))
 
@@ -164,14 +166,11 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_LIBRUSTC_$(3)):		\
                 $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_RUSTLLVM_$(3)) \
 		| $$(TLIB$(1)_T_$(2)_H_$(3))/
 	@$$(call E, compile_and_link: $$@)
-ifeq ($(1),0)
-	$$(Q)cp $(3)/stage0/$(CFG_LIBDIR)/rustlib/$(2)/$(CFG_LIBDIR)/* \
-		$(3)/stage0/$(CFG_LIBDIR)/rustc/$(2)/$(CFG_LIBDIR)/
-endif
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBRUSTC_GLOB_$(2)),$$(notdir $$@))
 	$$(call REMOVE_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBRUSTC_RGLOB_$(2)),$$(notdir $$@))
 	$$(STAGE$(1)_T_$(2)_H_$(3)) $$(WFLAGS_ST$(1)) \
 	    -L "$$(LLVM_LIBDIR_$(2))" \
+	    $$(LFLAGS_$(1)_$(2)_$(3)) \
 	    --out-dir $$(@D) $$< && touch $$@
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBRUSTC_GLOB_$(2)),$$(notdir $$@))
 	$$(call LIST_ALL_OLD_GLOB_MATCHES_EXCEPT,$$(dir $$@),$(LIBRUSTC_RGLOB_$(2)),$$(notdir $$@))
@@ -182,11 +181,8 @@ $$(TBIN$(1)_T_$(2)_H_$(3))/rustc$$(X_$(3)):			\
 		$$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_LIBRUSTC_$(3)) \
 		| $$(TBIN$(1)_T_$(2)_H_$(3))/
 	@$$(call E, compile_and_link: $$@)
-ifeq ($(1),0)
-	$$(Q)cp $(3)/stage0/$(CFG_LIBDIR)/rustlib/$(2)/$(CFG_LIBDIR)/* \
-		$(3)/stage0/$(CFG_LIBDIR)/rustc/$(2)/$(CFG_LIBDIR)/
-endif
-	$$(STAGE$(1)_T_$(2)_H_$(3)) --cfg rustc -o $$@ $$<
+	$$(STAGE$(1)_T_$(2)_H_$(3)) --cfg rustc -o $$@ $$< \
+	    $$(LFLAGS_$(1)_$(2)_$(3))
 ifdef CFG_ENABLE_PAX_FLAGS
 	@$$(call E, apply PaX flags: $$@)
 	@"$(CFG_PAXCTL)" -cm "$$@"
diff --git a/src/libnative/io/file.rs b/src/libnative/io/file.rs
index 0021dfcb881a4..dac1ca98cf9d4 100644
--- a/src/libnative/io/file.rs
+++ b/src/libnative/io/file.rs
@@ -79,10 +79,10 @@ impl FileDesc {
     pub fn inner_read(&mut self, buf: &mut [u8]) -> Result<uint, IoError> {
         #[cfg(windows)] type rlen = libc::c_uint;
         #[cfg(not(windows))] type rlen = libc::size_t;
-        let ret = keep_going(buf, |buf, len| {
-            unsafe {
-                libc::read(self.fd, buf as *mut libc::c_void, len as rlen) as i64
-            }
+        let ret = retry(|| unsafe {
+            libc::read(self.fd,
+                       buf.as_ptr() as *mut libc::c_void,
+                       buf.len() as rlen) as libc::c_int
         });
         if ret == 0 {
             Err(io::standard_error(io::EndOfFile))
diff --git a/src/libnative/lib.rs b/src/libnative/lib.rs
index 9c30e94194dd2..31395216f2b58 100644
--- a/src/libnative/lib.rs
+++ b/src/libnative/lib.rs
@@ -34,7 +34,7 @@ pub mod io;
 pub mod task;
 
 // XXX: this should not exist here
-#[cfg(stage0)]
+#[cfg(stage0, nativestart)]
 #[lang = "start"]
 pub fn lang_start(main: *u8, argc: int, argv: **u8) -> int {
     use std::cast;
diff --git a/src/libstd/io/pipe.rs b/src/libstd/io/pipe.rs
index 2349c64a84b27..e3f2cc2384c27 100644
--- a/src/libstd/io/pipe.rs
+++ b/src/libstd/io/pipe.rs
@@ -80,3 +80,25 @@ impl Writer for PipeStream {
         }
     }
 }
+
+#[cfg(test)]
+mod test {
+    iotest!(fn partial_read() {
+        use os;
+        use io::pipe::PipeStream;
+
+        let os::Pipe { input, out } = os::pipe();
+        let out = PipeStream::open(out);
+        let mut input = PipeStream::open(input);
+        let (p, c) = Chan::new();
+        do spawn {
+            let mut out = out;
+            out.write([10]);
+            p.recv(); // don't close the pipe until the other read has finished
+        }
+
+        let mut buf = [0, ..10];
+        input.read(buf);
+        c.send(());
+    })
+}