[PATCH] D56382: Change llvm call once check for building Swift for PowerPC(ppc64le)

[Sarvesh Tamba via Phabricator via llvm-commits]

sarveshtamba created this revision.
sarveshtamba added reviewers: nemanjai, compnerd.
Herald added subscribers: llvm-commits, jsji, kristina.

These changes are required to resolve the call_once related errors seen while building the Swift toolchain on PowerPC64LE. The existing macro checks are inadequate while building Swift on PowerPC64LE.


Repository:
  rL LLVM

https://reviews.llvm.org/D56382

Files:
  include/llvm/Support/Threading.h


Index: include/llvm/Support/Threading.h
===================================================================
--- include/llvm/Support/Threading.h
+++ include/llvm/Support/Threading.h
@@ -32,6 +32,10 @@
 // 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(__LITTLE_ENDIAN__))
+// Check for PowerPC64LE to use std::call_once	
+#define LLVM_THREADING_USE_STD_CALL_ONCE 1
 #else
 #define LLVM_THREADING_USE_STD_CALL_ONCE 0
 #endif


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