linux: Add open_how and related flags

1 files changed, 5 insertions, 0 deletions

diff --git a/build.rs b/build.rs
index 0e40178638..2ca7c97e18 100644
--- a/build.rs
+++ b/build.rs
@@ -72,6 +72,11 @@ fn main() {
         println!("cargo:rustc-cfg=libc_cfg_target_vendor");
     }
 
+    // Rust >= 1.40 supports #[non_exhaustive].
+    if rustc_minor_ver >= 40 || rustc_dep_of_std {
+        println!("cargo:rustc-cfg=libc_non_exhaustive");
+    }
+
     if rustc_minor_ver >= 51 || rustc_dep_of_std {
         println!("cargo:rustc-cfg=libc_ptr_addr_of");
     }