Use rlibc crate

Author: Ilya Dmitrichenko

Rakefile

@@ -18,6 +18,14 @@ compile_rust :hamcrest_crate, {
   do_not_collect_rust_deps: true,
 }
 
+# cross-compiled librlibc
+compile_rust :rlibc_crate, {
+  source:  'thirdparty/librlibc/lib.rs'.in_root,
+  produce: 'thirdparty/librlibc/lib.rs'.in_root.as_rlib.in_build,
+  out_dir: true,
+  recompile_on: :triple,
+}
+
 # cross-compiled libcore
 compile_rust :core_crate, {
   source:  'thirdparty/libcore/lib.rs'.in_root,
@@ -29,7 +37,7 @@ compile_rust :core_crate, {
 # zinc crate
 compile_rust :zinc_crate, {
   source:  'main.rs'.in_source,
-  deps:    :core_crate,
+  deps:    [:core_crate, :rlibc_crate],
   produce: 'main.rs'.in_source.as_rlib.in_build,
   out_dir: true,
   recompile_on: [:triple, :platform],
@@ -38,6 +46,7 @@ compile_rust :zinc_crate, {
 # zinc runtime support lib
 compile_rust :zinc_support, {
   source:  'lib/support.rs'.in_source,
+  deps:    [:rlibc_crate],
   produce: 'support.o'.in_intermediate,
   llvm_pass: :inline,
   lto: false,

src/lib/support.rs

@@ -17,51 +17,6 @@
 #![crate_type="rlib"]
 #![feature(asm, intrinsics)]
 
-extern "rust-intrinsic" {
-  pub fn offset<T>(dst: *const T, offset: int) -> *const T;
-}
-
-#[allow(non_camel_case_types)]
-pub type c_int = i32;
-
-#[no_mangle]
-#[no_split_stack]
-#[inline(never)]
-pub fn memcpy(dest: *mut u8, src: *const u8, n: int) {
-  unsafe {
-    let mut i = 0;
-    while i < n {
-      *(offset(dest as *const u8, i) as *mut u8) = *(offset(src, i));
-      i += 1;
-    }
-  }
-}
-
-#[no_mangle]
-#[no_split_stack]
-pub extern "C" fn __aeabi_memcpy(dest: *mut u8, src: *const u8, n: int) {
-  memcpy(dest, src, n);
-}
-
-#[no_mangle]
-#[no_split_stack]
-#[inline(never)]
-pub fn memset(s: *mut u8, c: c_int, n: int) {
-  unsafe {
-    let mut i = 0;
-    while i < n {
-      *(offset(s as *const u8, i) as *mut u8) = c as u8;
-      i += 1;
-    }
-  }
-}
-
-#[no_mangle]
-#[no_split_stack]
-pub extern "C" fn __aeabi_memset(s: *mut u8, n: int, c: c_int) {
-  memset(s, c, n);
-}
-
 #[cfg(test)]
 #[no_split_stack]
 #[no_mangle]

src/main.rs

@@ -45,6 +45,7 @@ STM32F403/407).
 */
 
 extern crate core;
+extern crate rlibc;
 
 #[cfg(test)] #[phase(plugin,link)] extern crate std;
 #[cfg(test)] extern crate native;

support/rake.rb

@@ -151,6 +151,10 @@ def provide_stdlibs
     sh "git clone --single-branch --depth 1 https://github.com/mozilla/rust #{t.name}"
   end.invoke
 
+  Rake::FileTask.define_task 'thirdparty/librlibc/lib.rs'.in_root do |t|
+    sh "ln -s rust/src/librlibc thirdparty/librlibc"
+  end.invoke
+
   Rake::FileTask.define_task 'thirdparty/libcore/lib.rs'.in_root do |t|
     sh "ln -s rust/src/libcore thirdparty/libcore"
   end.invoke