Export of internal Abseil changes

--
3e60f355db5afd7a864591d81a6c383b6c0a0780 by Samuel Benzaquen <sbenza@google.com>:

Internal change

PiperOrigin-RevId: 272531442

--
6d189240b8cebe3a390c730de491156d03049229 by Andy Getzendanner <durandal@google.com>:

Fix AtomicHook init-order fiasco under MSVC 2019.

On this platform, constexpr static init sometimes happens after dynamic init =/.  When it does, we should not zero hook_ (overwriting the value written there by dynamic init); instead we should leave it alone.  This works even when constexpr static init goes first since all uses of AtomicHook should have static storage duration and be zero-initialized.

https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html

PiperOrigin-RevId: 272525226

--
d01b14fc06bc75b41c51976ed32e7c304ea1aab7 by Abseil Team <absl-team@google.com>:

exclude emscripten from running tests involving long doubles

PiperOrigin-RevId: 272497628
GitOrigin-RevId: 3e60f355db5afd7a864591d81a6c383b6c0a0780
Change-Id: I3c8a8f5acaf7652a06ef40cf028ef5d2e142f81b

1 files changed, 2 insertions, 0 deletions

diff --git a/absl/random/internal/iostream_state_saver_test.cc b/absl/random/internal/iostream_state_saver_test.cc
index 2ecbaac..722766d 100644
--- a/absl/random/internal/iostream_state_saver_test.cc
+++ b/absl/random/internal/iostream_state_saver_test.cc
@@ -272,6 +272,7 @@ TEST(IOStreamStateSaver, RoundTripDoubles) {
   }
 }
 
+#if !defined(__EMSCRIPTEN__)
 TEST(IOStreamStateSaver, RoundTripLongDoubles) {
   // Technically, C++ only guarantees that long double is at least as large as a
   // double.  Practically it varies from 64-bits to 128-bits.
@@ -349,6 +350,7 @@ TEST(IOStreamStateSaver, RoundTripLongDoubles) {
     }
   }
 }
+#endif  // !defined(__EMSCRIPTEN__)
 
 TEST(StrToDTest, DoubleMin) {
   const char kV[] = "2.22507385850720138e-308";