From d6a3b5786ad5c454c79079e1e184a27b684a22c3 Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Thu, 14 Feb 2019 18:36:52 +0000
Subject: [PATCH] Support: use internal `call_once` on PPC64le

Always use the internal `call_once` for PPC64le.  This is needed to
support the Swift toolchain on PPC64le.

Patch by Sarvesh Tamba!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354045 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/Threading.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/llvm/Support/Threading.h b/include/llvm/Support/Threading.h
index 23b115f0b47..953c60f91dd 100644
--- a/include/llvm/Support/Threading.h
+++ b/include/llvm/Support/Threading.h
@@ -32,6 +32,9 @@
 // implementations like libstdc++ are known to have problems on NetBSD,
 // OpenBSD and PowerPC.
 #define LLVM_THREADING_USE_STD_CALL_ONCE 1
+#elif defined(LLVM_ON_UNIX) &&                                                 \
+    ((defined(__ppc__) || defined(__PPC__)) && defined(__LITTLE_ENDIAN__))
+#define LLVM_THREADING_USE_STD_CALL_ONCE 1
 #else
 #define LLVM_THREADING_USE_STD_CALL_ONCE 0
 #endif
-- 
2.40.0