Rollup merge of #120109 - joboet:move_pal_cmath, r=ChrisDenton

Move cmath into `sys`

Part of #117276.

r? ``@ChrisDenton``

library/std/src/sys/cmath/builtins.rs

@@ -1,5 +1,3 @@
-#![cfg(not(test))]
-
 // These symbols are all defined by `libm`,
 // or by `compiler-builtins` on unsupported platforms.
 

library/std/src/sys/cmath/mod.rs

@@ -0,0 +1,11 @@
+#![cfg(not(test))]
+
+cfg_if::cfg_if! {
+    if #[cfg(target_os = "windows")] {
+        mod windows;
+        pub use windows::*;
+    } else {
+        mod builtins;
+        pub use builtins::*;
+    }
+}

library/std/src/sys/cmath/windows.rs

@@ -1,5 +1,3 @@
-#![cfg(not(test))]
-
 use core::ffi::{c_double, c_float, c_int};
 
 extern "C" {

library/std/src/sys/mod.rs

@@ -3,9 +3,11 @@
 /// descriptors.
 mod pal;
 
-pub mod os_str;
 mod personality;
 
+pub mod cmath;
+pub mod os_str;
+
 // FIXME(117276): remove this, move feature implementations into individual
 //                submodules.
 pub use pal::*;

library/std/src/sys/pal/hermit/mod.rs

@@ -19,8 +19,6 @@
 
 pub mod alloc;
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 pub mod fd;
 pub mod fs;

library/std/src/sys/pal/sgx/mod.rs

@@ -13,8 +13,6 @@
 
 pub mod alloc;
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 pub mod fd;
 #[path = "../unsupported/fs.rs"]

library/std/src/sys/pal/solid/mod.rs

@@ -21,8 +21,6 @@ mod itron {
 pub mod alloc;
 #[path = "../unsupported/args.rs"]
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 // `error` is `pub(crate)` so that it can be accessed by `itron/error.rs` as
 // `crate::sys::error`

library/std/src/sys/pal/teeos/mod.rs

@@ -11,8 +11,6 @@
 pub mod alloc;
 #[path = "../unsupported/args.rs"]
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 #[path = "../unsupported/env.rs"]
 pub mod env;
 pub mod locks;

library/std/src/sys/pal/uefi/mod.rs

@@ -14,8 +14,6 @@
 
 pub mod alloc;
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 #[path = "../unsupported/fs.rs"]
 pub mod fs;

library/std/src/sys/pal/unix/mod.rs

@@ -11,8 +11,6 @@
 pub mod alloc;
 pub mod android;
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 pub mod fd;
 pub mod fs;

library/std/src/sys/pal/unsupported/mod.rs

@@ -2,8 +2,6 @@
 
 pub mod alloc;
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 pub mod fs;
 pub mod io;

library/std/src/sys/pal/wasi/mod.rs

@@ -20,8 +20,6 @@
 #[path = "../unix/alloc.rs"]
 pub mod alloc;
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 pub mod fd;
 pub mod fs;

library/std/src/sys/pal/wasm/mod.rs

@@ -19,8 +19,6 @@
 pub mod alloc;
 #[path = "../unsupported/args.rs"]
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 pub mod env;
 #[path = "../unsupported/fs.rs"]
 pub mod fs;

library/std/src/sys/pal/windows/mod.rs

@@ -15,7 +15,6 @@
 pub mod alloc;
 pub mod args;
 pub mod c;
-pub mod cmath;
 pub mod env;
 pub mod fs;
 pub mod handle;

library/std/src/sys/pal/xous/mod.rs

@@ -3,8 +3,6 @@
 pub mod alloc;
 #[path = "../unsupported/args.rs"]
 pub mod args;
-#[path = "../unix/cmath.rs"]
-pub mod cmath;
 #[path = "../unsupported/env.rs"]
 pub mod env;
 #[path = "../unsupported/fs.rs"]