From c05e9d9f39cfd9680cc59ae77c0ce1f938014932 Mon Sep 17 00:00:00 2001
From: Simonas Kazlauskas <git@kazlauskas.me>
Date: Mon, 31 Oct 2022 23:56:21 +0200
Subject: [PATCH] Add debuginfo flags for msvc assemblers

When code is being built with debuginfo, we need to instruct the
assemblers accordingly.
---
 src/lib.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 130389205..09e76cac1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1961,8 +1961,16 @@ impl Build {
             cmd.arg("-I").arg(directory);
         }
         if target.contains("aarch64") || target.contains("arm") {
+            if self.get_debug() {
+                cmd.arg("-g");
+            }
+
             println!("cargo:warning=The MSVC ARM assemblers do not support -D flags");
         } else {
+            if self.get_debug() {
+                cmd.arg("-Zi");
+            }
+
             for &(ref key, ref value) in self.definitions.iter() {
                 if let Some(ref value) = *value {
                     cmd.arg(&format!("-D{}={}", key, value));