From bf6e16d0b5dab576f5f95d063b828feb033b9dbf Mon Sep 17 00:00:00 2001
From: xd009642 <danielmckenna93@gmail.com>
Date: Sat, 2 Jan 2021 11:00:51 +0000
Subject: [PATCH] Add doctest llvm coverage

---
 .gitignore   | 1 +
 src/cargo.rs | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/.gitignore b/.gitignore
index b88d2a8b66..3e43a75d85 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,5 +5,6 @@ target/
 **/*.rs.bk
 *.log
 *.profraw
+*.profdata
 # Generated by IntelliJ IDEs
 .idea
diff --git a/src/cargo.rs b/src/cargo.rs
index aa0f786692..53d674998d 100644
--- a/src/cargo.rs
+++ b/src/cargo.rs
@@ -463,6 +463,9 @@ pub fn rustdoc_flags(config: &Config) -> String {
             value.push_str(vtemp.as_ref());
         }
     }
+    if supports_llvm_coverage() {
+        value.push_str("-Z instrument-coverage ");
+    }
     value
 }