From 63b39e275846896083ab11721b5aae5c806bdcbc Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Sun, 21 May 2017 11:41:04 +0100
Subject: [PATCH] Enhance thread_local tests. Try to reproduce issues:
 https://github.com/libbitcoin/libbitcoin/issues/733#issuecomment-301652210
 https://github.com/boostorg/multiprecision/issues/20

---
 test/boost_no_cxx11_thread_local.ipp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/test/boost_no_cxx11_thread_local.ipp b/test/boost_no_cxx11_thread_local.ipp
index 795ee746..caaed978 100644
--- a/test/boost_no_cxx11_thread_local.ipp
+++ b/test/boost_no_cxx11_thread_local.ipp
@@ -14,10 +14,22 @@
 
 namespace boost_no_cxx11_thread_local{
 
+template <class T>
+int check_local(int n)
+{
+   static thread_local T s(n, ' ');
+   static thread_local int size = s.size();
+   if(size != n)
+   {
+      s = T(n, ' ');
+	  size = n;
+   }
+   return size;
+}
+
 int test()
 {
-   static thread_local std::string local("hello");
-   return 0;
+   return check_local<std::string>(5) == 5 ? 0 : 1;
 }
 
 }