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, 4 insertions, 0 deletions

diff --git a/src/libstd/sys/unix/mod.rs b/src/libstd/sys/unix/mod.rs
index c2772e2e2cc..9bdea945ea4 100644
--- a/src/libstd/sys/unix/mod.rs
+++ b/src/libstd/sys/unix/mod.rs
@@ -29,6 +29,9 @@ use libc;
 #[cfg(all(not(dox), target_os = "fuchsia"))]   pub use os::fuchsia as platform;
 #[cfg(all(not(dox), target_os = "l4re"))]      pub use os::linux as platform;
 
+pub use self::rand::hashmap_random_keys;
+pub use libc::strlen;
+
 #[macro_use]
 pub mod weak;
 
@@ -36,6 +39,7 @@ pub mod args;
 pub mod android;
 #[cfg(feature = "backtrace")]
 pub mod backtrace;
+pub mod cmath;
 pub mod condvar;
 pub mod env;
 pub mod ext;