Only enable mremap wrapper on Linux, since it's Linux-specific

sporksmith · sporksmith · commit 7a46b52c7ac1 · 2020-10-05T09:44:48.000-05:00
diff --git a/src/sys/mman.rs b/src/sys/mman.rs
@@ -320,6 +320,7 @@ pub unsafe fn mmap(addr: *mut c_void, length: size_t, prot: ProtFlags, flags: Ma
 /// # Safety
 ///
 /// See the `mremap(2)` man page for detailed requirements.
+#[cfg(target_os = "linux")]
 pub unsafe fn mremap(
     addr: *mut c_void,
     old_size: size_t,
