#endif
}
-ios_base::Init::Init()
+class DoIOSInit {
+public:
+ DoIOSInit();
+ ~DoIOSInit();
+};
+
+DoIOSInit::DoIOSInit()
{
force_locale_initialization();
#endif
}
-ios_base::Init::~Init()
+DoIOSInit::~DoIOSInit()
{
#ifndef _LIBCPP_HAS_NO_STDOUT
ostream* cout_ptr = reinterpret_cast<ostream*>(cout);
wclog_ptr->flush();
}
+ios_base::Init::Init()
+{
+ static DoIOSInit init_the_streams; // gets initialized once
+}
+
+ios_base::Init::~Init()
+{
+}
+
_LIBCPP_END_NAMESPACE_STD
--- /dev/null
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <iostream>
+#include <cassert>
+
+#include "test_macros.h"
+
+// Test to make sure that the streams only get initialized once
+// Taken from https://bugs.llvm.org/show_bug.cgi?id=43300
+
+int main(int, char**)
+{
+
+ std::cout << "Hello!";
+ std::ios_base::fmtflags stock_flags = std::cout.flags();
+
+ std::cout << std::boolalpha << true;
+ std::ios_base::fmtflags ba_flags = std::cout.flags();
+ assert(stock_flags != ba_flags);
+
+ std::ios_base::Init init_streams;
+ std::ios_base::fmtflags after_init = std::cout.flags();
+ assert(after_init == ba_flags);
+
+ return 0;
+}