[patch] libstdc++/67309 Make <random> work with -fsingle-precision-constant

[patch] libstdc++/67309 Make <random> work with -fsingle-precision-constant

[Jonathan Wakely]

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With -fsingle-precision-constant std::max(1.0, some_double) can't
deduce the template argument, so make it explicit.

Tested powerpc64le-linux, committed to trunk.

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commit 9cdc1c4ff5e46394052808b0cfadd1b3190aae96
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Aug 21 19:38:01 2015 +0100

    	PR libstdc++/67309
    	* include/bits/random.tcc
    	(poisson_distribution::param_type::_M_initialize): Use max<double>.
    	(binomial_distribution::param_type::_M_initialize): Likewise.
    	* testsuite/17_intro/headers/c++200x/67309.cc: New.
    	* testsuite/17_intro/headers/c++200x/all_attributes.cc: Remove
    	redundant header.

diff --git a/libstdc++-v3/include/bits/random.tcc b/libstdc++-v3/include/bits/random.tcc
index f10d052..4fdbcfc 100644
--- a/libstdc++-v3/include/bits/random.tcc
+++ b/libstdc++-v3/include/bits/random.tcc
@@ -1405,7 +1405,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	  const double __pi_4 = 0.7853981633974483096156608458198757L;
 	  const double __dx = std::sqrt(2 * __m * std::log(32 * __m
 							      / __pi_4));
-	  _M_d = std::round(std::max(6.0, std::min(__m, __dx)));
+	  _M_d = std::round(std::max<double>(6.0, std::min(__m, __dx)));
 	  const double __cx = 2 * __m + _M_d;
 	  _M_scx = std::sqrt(__cx / 2);
 	  _M_1cx = 1 / __cx;
@@ -1613,11 +1613,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	  const double __d1x =
 	    std::sqrt(__np * __1p * std::log(32 * __np
 					     / (81 * __pi_4 * __1p)));
-	  _M_d1 = std::round(std::max(1.0, __d1x));
+	  _M_d1 = std::round(std::max<double>(1.0, __d1x));
 	  const double __d2x =
 	    std::sqrt(__np * __1p * std::log(32 * _M_t * __1p
 					     / (__pi_4 * __pa)));
-	  _M_d2 = std::round(std::max(1.0, __d2x));
+	  _M_d2 = std::round(std::max<double>(1.0, __d2x));
 
 	  // sqrt(pi / 2)
 	  const double __spi_2 = 1.2533141373155002512078826424055226L;
diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++200x/67309.cc b/libstdc++-v3/testsuite/17_intro/headers/c++200x/67309.cc
new file mode 100644
index 0000000..97df10f
--- /dev/null
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++200x/67309.cc
@@ -0,0 +1,23 @@
+// Copyright (C) 2015 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-std=gnu++11 -fsingle-precision-constant" }
+// { dg-do compile }
+
+// libstdc++/67309
+#include <bits/stdc++.h> // TODO: this is missing from <bits/extc++.h>
+#include <bits/extc++.h>
diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++200x/all_attributes.cc b/libstdc++-v3/testsuite/17_intro/headers/c++200x/all_attributes.cc
index 8d93fd9..ae15f31 100644
--- a/libstdc++-v3/testsuite/17_intro/headers/c++200x/all_attributes.cc
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++200x/all_attributes.cc
@@ -35,7 +35,6 @@
 #endif
 
 #include <bits/stdc++.h> // TODO: this is missing from <bits/extc++.h>
-#include <codecvt>       // TODO: this is missing from <bits/stdc++.h>
 #include <bits/extc++.h>
 
 int