auto merge of #4900 : luqmana/rust/core_os_errors, r=graydon

Rewrote the last pull request (#4859) to not require on llvm for core.

Also fixes #2269.

src/test/auxiliary/anon-extern-mod-cross-crate-1.rs

@@ -15,5 +15,5 @@
 
 #[crate_type = "lib"];
 extern {
-  fn last_os_error() -> ~str;
+  fn rust_get_argc() -> libc::c_int;
 }

src/test/auxiliary/foreign_lib.rs

@@ -11,5 +11,5 @@
 #[link(name="foreign_lib", vers="0.0")];
 
 pub extern mod rustrt {
-    pub fn last_os_error() -> ~str;
+    pub fn rust_get_argc() -> libc::c_int;
 }

src/test/run-fail/morestack2.rs

@@ -18,7 +18,7 @@
 extern mod std;
 
 extern mod rustrt {
-    pub fn last_os_error() -> ~str;
+    pub fn rust_get_argc() -> libc::c_int;
 }
 
 fn getbig_call_c_and_fail(i: int) {
@@ -26,7 +26,7 @@ fn getbig_call_c_and_fail(i: int) {
         getbig_call_c_and_fail(i - 1);
     } else {
         unsafe {
-            rustrt::last_os_error();
+            rustrt::rust_get_argc();
             die!();
         }
     }

src/test/run-pass/anon-extern-mod-cross-crate-2.rs

@@ -15,5 +15,5 @@ extern mod anonexternmod;
 use anonexternmod::*;
 
 pub fn main() {
-  last_os_error();
+  rust_get_argc();
 }

src/test/run-pass/anon-extern-mod.rs

@@ -11,11 +11,11 @@
 #[abi = "cdecl"]
 #[link_name = "rustrt"]
 extern {
-    fn last_os_error() -> ~str;
+    fn rust_get_argc() -> libc::c_int;
 }
 
 pub fn main() {
     unsafe {
-        let _ = last_os_error();
+        let _ = rust_get_argc();
     }
 }

src/test/run-pass/foreign-dupe.rs

@@ -14,18 +14,18 @@
 #[abi = "cdecl"]
 #[link_name = "rustrt"]
 extern mod rustrt1 {
-    pub fn last_os_error() -> ~str;
+    pub fn rust_get_argc() -> libc::c_int;
 }
 
 #[abi = "cdecl"]
 #[link_name = "rustrt"]
 extern mod rustrt2 {
-    pub fn last_os_error() -> ~str;
+    pub fn rust_get_argc() -> libc::c_int;
 }
 
 pub fn main() {
     unsafe {
-        rustrt1::last_os_error();
-        rustrt2::last_os_error();
+        rustrt1::rust_get_argc();
+        rustrt2::rust_get_argc();
     }
 }

src/test/run-pass/invoke-external-foreign.rs

@@ -18,5 +18,5 @@
 extern mod foreign_lib;
 
 pub fn main() {
-    let foo = foreign_lib::rustrt::last_os_error();
+    let foo = foreign_lib::rustrt::rust_get_argc();
 }

src/test/run-pass/morestack6.rs

@@ -15,7 +15,7 @@ extern mod rustrt {
     pub fn debug_get_stk_seg() -> *u8;
 
     pub fn rust_get_sched_id() -> libc::intptr_t;
-    pub fn last_os_error() -> ~str;
+    pub fn rust_get_argc() -> libc::c_int;
     pub fn rust_getcwd() -> ~str;
     pub fn get_task_id() -> libc::intptr_t;
     pub fn rust_sched_threads();
@@ -23,7 +23,7 @@ extern mod rustrt {
 }
 
 fn calllink01() { unsafe { rustrt::rust_get_sched_id(); } }
-fn calllink02() { unsafe { rustrt::last_os_error(); } }
+fn calllink02() { unsafe { rustrt::rust_get_argc(); } }
 fn calllink03() { unsafe { rustrt::rust_getcwd(); } }
 fn calllink08() { unsafe { rustrt::get_task_id(); } }
 fn calllink09() { unsafe { rustrt::rust_sched_threads(); } }