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-rw-r--r--libcxx/include/future2
-rw-r--r--libcxx/include/ios4
2 files changed, 3 insertions, 3 deletions
diff --git a/libcxx/include/future b/libcxx/include/future
index 7cd88cb726b..83513fa693d 100644
--- a/libcxx/include/future
+++ b/libcxx/include/future
@@ -374,7 +374,7 @@ template <class R, class Alloc> struct uses_allocator<packaged_task<R>, Alloc>;
#pragma GCC system_header
#endif
-#ifndef _LIBCPP_HAS_NO_THREADS
+#ifdef _LIBCPP_HAS_NO_THREADS
#error <future> is not supported on this single threaded system
#else // !_LIBCPP_HAS_NO_THREADS
diff --git a/libcxx/include/ios b/libcxx/include/ios
index 6d426079d4f..ff79998b0bb 100644
--- a/libcxx/include/ios
+++ b/libcxx/include/ios
@@ -216,7 +216,7 @@ storage-class-specifier const error_category& iostream_category() noexcept;
#include <__locale>
#include <system_error>
-#if __has_feature(cxx_atomic) && !_LIBCPP_HAS_NO_THREADS
+#if __has_feature(cxx_atomic) && !defined(_LIBCPP_HAS_NO_THREADS)
#include <atomic> // for __xindex_
#endif
@@ -367,7 +367,7 @@ private:
int* __index_;
size_t __event_size_;
size_t __event_cap_;
-#if __has_feature(cxx_atomic) && !_LIBCPP_HAS_NO_THREADS
+#if __has_feature(cxx_atomic) && !defined(_LIBCPP_HAS_NO_THREADS)
static atomic<int> __xindex_;
#else
static int __xindex_;
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