From 31005a98c091b4f28650cad4b7420d54b72381ad Mon Sep 17 00:00:00 2001
From: Peter Griess <pgriess@fb.com>
Date: Tue, 8 Oct 2013 20:57:32 -0700
Subject: [PATCH] Check for std::this_thread::sleep_for.

Summary:
- Some installations of libstdc++ don't have this defined. This happens
if they were built without --enable-libstdcxx-time. Detect this and
avoid tests that rely on this behavior.

Test Plan:
- fbconfig -r folly && fbmake runtests
- ./configure && make check on Ubuntu/FC/Mac

Reviewed By: meyering@fb.com

FB internal diff: D1002963
---
 folly/configure.ac             | 9 +++++++++
 folly/test/ThreadLocalTest.cpp | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/folly/configure.ac b/folly/configure.ac
index 29ae18fd..1b5e7b10 100644
--- a/folly/configure.ac
+++ b/folly/configure.ac
@@ -78,6 +78,15 @@ AC_COMPILE_IFELSE(
    AC_DEFINE([OVERRIDE], [],
              [Define to "override" if the compiler supports C++11 "override"])]
 )
+
+AC_COMPILE_IFELSE(
+  [AC_LANG_SOURCE[
+    #include <thread>
+    #include <chrono>
+    void func() { std::this_thread::sleep_for(std::chrono::seconds(1)); }]],
+  [AC_DEFINE([HAVE_STD__THIS_THREAD__SLEEP_FOR], [1],
+             [Define to 1 if std::this_thread::sleep_for() is defined.])])
+
 AC_COMPILE_IFELSE(
   [AC_LANG_SOURCE[
     #include <type_traits>
diff --git a/folly/test/ThreadLocalTest.cpp b/folly/test/ThreadLocalTest.cpp
index b9f69a0f..d78e07ea 100644
--- a/folly/test/ThreadLocalTest.cpp
+++ b/folly/test/ThreadLocalTest.cpp
@@ -346,6 +346,7 @@ class FillObject {
 
 }  // namespace
 
+#if FOLLY_HAVE_STD__THIS_THREAD__SLEEP_FOR
 TEST(ThreadLocal, Stress) {
   constexpr size_t numFillObjects = 250;
   std::array<ThreadLocalPtr<FillObject>, numFillObjects> objects;
@@ -376,6 +377,7 @@ TEST(ThreadLocal, Stress) {
 
   EXPECT_EQ(numFillObjects * numThreads * numReps, gDestroyed);
 }
+#endif
 
 // Yes, threads and fork don't mix
 // (http://cppwisdom.quora.com/Why-threads-and-fork-dont-mix) but if you're
-- 
2.34.1