From: Ximin Luo <infinity0@debian.org>
Date: Thu, 14 Jul 2022 13:17:37 +0200
Subject: Don't split dwarf debug for a fully-reproducible build

Bug: https://github.com/rust-lang/rust/issues/34902
---
 compiler/rustc_llvm/build.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compiler/rustc_llvm/build.rs b/compiler/rustc_llvm/build.rs
index 7729ec6..b8f67ee 100644
--- a/compiler/rustc_llvm/build.rs
+++ b/compiler/rustc_llvm/build.rs
@@ -179,6 +179,11 @@ fn main() {
     let mut cfg = cc::Build::new();
     cfg.warnings(false);
     for flag in cxxflags.split_whitespace() {
+        // Split-dwarf gives unreproducible DW_AT_GNU_dwo_id so don't do it
+        if flag == "-gsplit-dwarf" {
+            continue;
+        }
+
         // Ignore flags like `-m64` when we're doing a cross build
         if is_crossed && flag.starts_with("-m") {
             continue;