Allow libc++ to be built on systems without POSIX threads

If you're crazy enough to want this sort of thing, then add
-D_LIBCPP_HAS_NO_THREADS to your CXXFLAGS and
--param=additiona_features=libcpp-has-no-threads to your lit commnad line.

http://reviews.llvm.org/D3969

llvm-svn: 217271

43 files changed, 102 insertions, 0 deletions

diff --git a/libcxx/test/atomics/atomics.fences/atomic_signal_fence.pass.cpp b/libcxx/test/atomics/atomics.fences/atomic_signal_fence.pass.cpp
index 65e1d3813c9..aec060c4d5f 100644
--- a/libcxx/test/atomics/atomics.fences/atomic_signal_fence.pass.cpp
+++ b/libcxx/test/atomics/atomics.fences/atomic_signal_fence.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.fences/atomic_thread_fence.pass.cpp b/libcxx/test/atomics/atomics.fences/atomic_thread_fence.pass.cpp
index 8c2abc0442e..4f3b0e330e3 100644
--- a/libcxx/test/atomics/atomics.fences/atomic_thread_fence.pass.cpp
+++ b/libcxx/test/atomics/atomics.fences/atomic_thread_fence.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/atomic_flag_clear.pass.cpp b/libcxx/test/atomics/atomics.flag/atomic_flag_clear.pass.cpp
index 12be67c4f18..64093d639e4 100644
--- a/libcxx/test/atomics/atomics.flag/atomic_flag_clear.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/atomic_flag_clear.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/atomic_flag_clear_explicit.pass.cpp b/libcxx/test/atomics/atomics.flag/atomic_flag_clear_explicit.pass.cpp
index f1065dc544f..e1a9349c939 100644
--- a/libcxx/test/atomics/atomics.flag/atomic_flag_clear_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/atomic_flag_clear_explicit.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set.pass.cpp b/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set.pass.cpp
index e3934d856f5..ae82df91954 100644
--- a/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set_explicit.pass.cpp b/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set_explicit.pass.cpp
index 83ee78ddea7..154850697c2 100644
--- a/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/atomic_flag_test_and_set_explicit.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/clear.pass.cpp b/libcxx/test/atomics/atomics.flag/clear.pass.cpp
index 171f03812ab..65051af790d 100644
--- a/libcxx/test/atomics/atomics.flag/clear.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/clear.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/default.pass.cpp b/libcxx/test/atomics/atomics.flag/default.pass.cpp
index 5c077b0a166..45f5e709245 100644
--- a/libcxx/test/atomics/atomics.flag/default.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/default.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/init.pass.cpp b/libcxx/test/atomics/atomics.flag/init.pass.cpp
index 8a67e14e33c..c90509d8fbb 100644
--- a/libcxx/test/atomics/atomics.flag/init.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/init.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.flag/test_and_set.pass.cpp b/libcxx/test/atomics/atomics.flag/test_and_set.pass.cpp
index 24052754d19..210ba2050bb 100644
--- a/libcxx/test/atomics/atomics.flag/test_and_set.pass.cpp
+++ b/libcxx/test/atomics/atomics.flag/test_and_set.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.lockfree/lockfree.pass.cpp b/libcxx/test/atomics/atomics.lockfree/lockfree.pass.cpp
index 467f561eca8..a975a69a66f 100644
--- a/libcxx/test/atomics/atomics.lockfree/lockfree.pass.cpp
+++ b/libcxx/test/atomics/atomics.lockfree/lockfree.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.order/kill_dependency.pass.cpp b/libcxx/test/atomics/atomics.order/kill_dependency.pass.cpp
index 1beeb08e80c..0f0bafcbb0a 100644
--- a/libcxx/test/atomics/atomics.order/kill_dependency.pass.cpp
+++ b/libcxx/test/atomics/atomics.order/kill_dependency.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.order/memory_order.pass.cpp b/libcxx/test/atomics/atomics.order/memory_order.pass.cpp
index 82893044631..e734a4c7597 100644
--- a/libcxx/test/atomics/atomics.order/memory_order.pass.cpp
+++ b/libcxx/test/atomics/atomics.order/memory_order.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.generic/address.pass.cpp b/libcxx/test/atomics/atomics.types.generic/address.pass.cpp
index af9826f7f40..63ede41f589 100644
--- a/libcxx/test/atomics/atomics.types.generic/address.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.generic/address.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... test case crashes clang.
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.generic/bool.pass.cpp b/libcxx/test/atomics/atomics.types.generic/bool.pass.cpp
index 80e5665638c..aaf42438209 100644
--- a/libcxx/test/atomics/atomics.types.generic/bool.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.generic/bool.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.generic/cstdint_typedefs.pass.cpp b/libcxx/test/atomics/atomics.types.generic/cstdint_typedefs.pass.cpp
index eac51777dc5..a7874b9f5af 100644
--- a/libcxx/test/atomics/atomics.types.generic/cstdint_typedefs.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.generic/cstdint_typedefs.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.generic/integral.pass.cpp b/libcxx/test/atomics/atomics.types.generic/integral.pass.cpp
index 26caa5001d5..70aaa61803a 100644
--- a/libcxx/test/atomics/atomics.types.generic/integral.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.generic/integral.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.generic/integral_typedefs.pass.cpp b/libcxx/test/atomics/atomics.types.generic/integral_typedefs.pass.cpp
index c622d6e09bf..e8fae85fb4b 100644
--- a/libcxx/test/atomics/atomics.types.generic/integral_typedefs.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.generic/integral_typedefs.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.generic/trivially_copyable.pass.cpp b/libcxx/test/atomics/atomics.types.generic/trivially_copyable.pass.cpp
index 8cdd0878d47..c5c18f0a86b 100644
--- a/libcxx/test/atomics/atomics.types.generic/trivially_copyable.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.generic/trivially_copyable.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp
index e9541949823..f1cc993ed33 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 34
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp
index 7d84f8152b1..f667ab7f139 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 38
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp
index b0902cd8e04..2a5c56e978c 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 34
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp
index fdb0b7dbd14..4ba3a053f5d 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 38
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange.pass.cpp
index b7edfcecd35..525e74aa637 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... fails assertion line 31
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange_explicit.pass.cpp
index e1a2c5ff41d..9fe4ac81644 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange_explicit.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 32
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add.pass.cpp
index c9ec413eb5c..3408def9058 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... test crashes clang
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add_explicit.pass.cpp
index 804289c9e3b..9977bd491e7 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add_explicit.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... test crashes clang
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and.pass.cpp
index 01d2cc6d361..4c7c0432efc 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and_explicit.pass.cpp
index abfb83db1c8..d83bbf264de 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and_explicit.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or.pass.cpp
index 43b6c4f3330..acf6d439de4 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or_explicit.pass.cpp
index 21078bbfff8..72685e4d940 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_or_explicit.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub.pass.cpp
index 0a0fa0a16da..ed8b541291a 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... test crashes clang
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub_explicit.pass.cpp
index cd7cfd8ab6e..e6c92eada6d 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub_explicit.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... test crashes clang
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor.pass.cpp
index 78120a76c1c..fc6b97b7db4 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor_explicit.pass.cpp
index 0a0cd154ccd..58772aa4d15 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_xor_explicit.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_init.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_init.pass.cpp
index 98d4bee476a..137b6f60f74 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_init.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_init.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 34
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp
index 4071989204b..18a1605e209 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load.pass.cpp
index 80ee0dbe65d..66918c71f1f 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 34
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load_explicit.pass.cpp
index c6c1921d24a..5f402a9f139 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load_explicit.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 31
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store.pass.cpp
index b9d6c92ae30..2b9582b3c52 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 31
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store_explicit.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store_explicit.pass.cpp
index 6644345a075..8fe0c7d8842 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store_explicit.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store_explicit.pass.cpp
@@ -6,6 +6,9 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+//  ... assertion fails line 31
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp
index 6758c7bb5eb..5fed691da26 100644
--- a/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp
+++ b/libcxx/test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>
 
diff --git a/libcxx/test/atomics/version.pass.cpp b/libcxx/test/atomics/version.pass.cpp
index 85c42704e0d..fae2736d229 100644
--- a/libcxx/test/atomics/version.pass.cpp
+++ b/libcxx/test/atomics/version.pass.cpp
@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
 
 // <atomic>