[dpdk-rs] Enhancement: update intrinsics flags for bindgen and inline

* Add the -mavx flag to build of the inline translation unit to match
  the flag passed to clang for bindgen.

* Add the rtm and cldemote flags for both bindgen and inline to make
  visible respective intrinsics in the application namespace. This
  allows build.rs to be robust to DPDK that may have intrinsics option
  enabled instead of inline asm.

Signed-off-by: Tyler Retzlaff <roretzla@microsoft.com>

dpdk-rs/build.rs

@@ -83,6 +83,8 @@ fn os_build() -> Result<()> {
     // Step 2: Generate bindings for the DPDK headers.
     let bindings: Bindings = Builder::default()
         .clang_arg(&format!("-I{}", include_path))
+        .clang_arg("-mrtm")
+        .clang_arg("-mcldemote")
         .allowlist_recursively(true)
         .allowlist_type("rte_mbuf")
         .allowlist_type("rte_mempool")
@@ -162,6 +164,9 @@ fn os_build() -> Result<()> {
     let mut builder: Build = cc::Build::new();
     builder.opt_level(3);
     builder.flag("-march=native");
+    builder.flag("-mavx");
+    builder.flag("-mrtm");
+    builder.flag("-mcldemote");
     builder.file("inlined.c");
     builder.include(include_path);
     builder.compile("inlined");