From 0292ddc711444574b3331e9adf50abf42c7dcaa0 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sat, 11 Apr 2020 15:11:44 +0200
Subject: [PATCH] [FormatVariadic] Put back return type in an attempt to make
 GCC happy

---
 llvm/include/llvm/Support/FormatVariadic.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/llvm/include/llvm/Support/FormatVariadic.h b/llvm/include/llvm/Support/FormatVariadic.h
index 60ea075..16debe2 100644
--- a/llvm/include/llvm/Support/FormatVariadic.h
+++ b/llvm/include/llvm/Support/FormatVariadic.h
@@ -246,7 +246,9 @@ public:
 // assertion.  Otherwise, it will try to do something reasonable, but in general
 // the details of what that is are undefined.
 //
-template <typename... Ts> inline auto formatv(const char *Fmt, Ts &&... Vals) {
+template <typename... Ts>
+inline auto formatv(const char *Fmt, Ts &&... Vals) -> formatv_object<decltype(
+    std::make_tuple(detail::build_format_adapter(std::forward<Ts>(Vals))...))> {
   using ParamTuple = decltype(
       std::make_tuple(detail::build_format_adapter(std::forward<Ts>(Vals))...));
   return formatv_object<ParamTuple>(
-- 
2.7.4