Auto merge of #45725 - alexcrichton:std-less-rand, r=dtolnay

Working towards a libc-less (wasm32) libstd

This is a series of commits I was able to extract from prepare to comiple libstd on a "bare libc-less" target, notably wasm32. The actual wasm32 bits I intend to send in a PR later, this is just some internal refactorings required for libstd to work with a `libc` that's empty and a few other assorted refactorings.

No functional change should be included in this PR for users of libstd, this is intended to just be internal refactorings.

1 files changed, 6 insertions, 5 deletions

diff --git a/src/libstd/sys_common/backtrace.rs b/src/libstd/sys_common/backtrace.rs
index 8f78c2e6f59..9f0214f5f05 100644
--- a/src/libstd/sys_common/backtrace.rs
+++ b/src/libstd/sys_common/backtrace.rs
@@ -14,7 +14,6 @@
 use env;
 use io::prelude::*;
 use io;
-use libc;
 use str;
 use sync::atomic::{self, Ordering};
 use path::{self, Path};
@@ -39,9 +38,9 @@ pub const HEX_WIDTH: usize = 10;
 #[derive(Debug, Copy, Clone)]
 pub struct Frame {
     /// Exact address of the call that failed.
-    pub exact_position: *const libc::c_void,
+    pub exact_position: *const u8,
     /// Address of the enclosing function.
-    pub symbol_addr: *const libc::c_void,
+    pub symbol_addr: *const u8,
 }
 
 /// Max number of frames to print.
@@ -201,8 +200,10 @@ fn output(w: &mut Write, idx: usize, frame: Frame,
 ///
 /// See also `output`.
 #[allow(dead_code)]
-fn output_fileline(w: &mut Write, file: &[u8], line: libc::c_int,
-                       format: PrintFormat) -> io::Result<()> {
+fn output_fileline(w: &mut Write,
+                   file: &[u8],
+                   line: u32,
+                   format: PrintFormat) -> io::Result<()> {
     // prior line: "  ##: {:2$} - func"
     w.write_all(b"")?;
     match format {