[PATCH] D65370: libcxx: Define __STDCPP_THREADS__ to 1, not to __cplusplus.

[Nico Weber via Phabricator via llvm-commits]

thakis created this revision.
thakis added a reviewer: EricWF.
Herald added a subscriber: christof.

[cpp.predefined]p2:

  __STDCPP_THREADS__
   Defined, and has the value integer literal 1, if and only if a program
   can have more than one thread of execution .

Part of PR33230.


https://reviews.llvm.org/D65370

Files:
  libcxx/include/thread
  libcxx/test/std/thread/macro.pass.cpp


Index: libcxx/test/std/thread/macro.pass.cpp
===================================================================
--- libcxx/test/std/thread/macro.pass.cpp
+++ libcxx/test/std/thread/macro.pass.cpp
@@ -10,7 +10,7 @@
 
 // <thread>
 
-// #define __STDCPP_THREADS__ __cplusplus
+// #define __STDCPP_THREADS__ 1
 
 #include <thread>
 
Index: libcxx/include/thread
===================================================================
--- libcxx/include/thread
+++ libcxx/include/thread
@@ -14,7 +14,7 @@
 
     thread synopsis
 
-#define __STDCPP_THREADS__ __cplusplus
+#define __STDCPP_THREADS__ 1
 
 namespace std
 {
@@ -107,7 +107,7 @@
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
 
-#define __STDCPP_THREADS__ __cplusplus
+#define __STDCPP_THREADS__ 1
 
 #ifdef _LIBCPP_HAS_NO_THREADS
 #error <thread> is not supported on this single threaded system


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