Rationalise PCH headers and 17_intro/headers tests.

PR libstdc++/64857
	* doc/xml/manual/using.xml: Improve aggregate header documentation.
	* doc/html/manual/*: Regenerate.
	* include/precompiled/extc++.h: Include <bits/stdc++.h> for C++11
	and later and include more extension headers.
	* testsuite/17_intro/headers/c++1998/all_attributes.cc: Remove
	redundant header.
	* testsuite/17_intro/headers/c++200x/: Rename to c++2011.
	* testsuite/17_intro/headers/c++2014/all_attributes.cc: Remove
	redundant headers.
	* testsuite/17_intro/headers/c++2014/all_no_exceptions.cc: New.
	* testsuite/17_intro/headers/c++2014/all_no_rtti.cc: New.
	* testsuite/17_intro/headers/c++2014/all_pedantic_errors.cc: New.
	* testsuite/17_intro/headers/c++2014/operator_names.cc: New.
	* testsuite/17_intro/headers/c++2014/stdc++.cc: New.
	* testsuite/17_intro/headers/c++2014/stdc++_multiple_inclusion.cc:
	New.

From-SVN: r227684

libstdc++-v3/ChangeLog

@@ -1,5 +1,23 @@
 2015-09-11  Jonathan Wakely  <jwakely@redhat.com>
 
+	PR libstdc++/64857
+	* doc/xml/manual/using.xml: Improve aggregate header documentation.
+	* doc/html/manual/*: Regenerate.
+	* include/precompiled/extc++.h: Include <bits/stdc++.h> for C++11
+	and later and include more extension headers.
+	* testsuite/17_intro/headers/c++1998/all_attributes.cc: Remove
+	redundant header.
+	* testsuite/17_intro/headers/c++200x/: Rename to c++2011.
+	* testsuite/17_intro/headers/c++2014/all_attributes.cc: Remove
+	redundant headers.
+	* testsuite/17_intro/headers/c++2014/all_no_exceptions.cc: New.
+	* testsuite/17_intro/headers/c++2014/all_no_rtti.cc: New.
+	* testsuite/17_intro/headers/c++2014/all_pedantic_errors.cc: New.
+	* testsuite/17_intro/headers/c++2014/operator_names.cc: New.
+	* testsuite/17_intro/headers/c++2014/stdc++.cc: New.
+	* testsuite/17_intro/headers/c++2014/stdc++_multiple_inclusion.cc:
+	New.
+
 	PR libstdc++/58265
 	* doc/xml/manual/intro.xml: Document LWG 2063 and 2064 resolutions.
 	* doc/html/manual/bugs.html: Regenerate.

libstdc++-v3/doc/html/manual/using.html

@@ -11,7 +11,8 @@
       The standard library conforms to the dialect of C++ specified by the
       <code class="option">-std</code> option passed to the compiler.
       By default, <span class="command"><strong>g++</strong></span> is equivalent to
-      <span class="command"><strong>g++ -std=gnu++98</strong></span>.
+      <span class="command"><strong>g++ -std=gnu++14</strong></span> since GCC 6, and
+      <span class="command"><strong>g++ -std=gnu++98</strong></span> for older releases.
     </p><div class="table"><a id="table.cmd_options"></a><p class="title"><strong>Table 3.1. C++ Command Options</strong></p><div class="table-contents"><table summary="C++ Command Options" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /></colgroup><thead><tr><th align="left">Option Flags</th><th align="left">Description</th></tr></thead><tbody><tr><td align="left"><code class="literal">-std=c++98</code> or <code class="literal">-std=c++03</code>
       </td><td align="left">Use the 1998 ISO C++ standard plus amendments.</td></tr><tr><td align="left"><code class="literal">-std=gnu++98</code> or <code class="literal">-std=gnu++03</code>
       </td><td align="left">As directly above, with GNU extensions.</td></tr><tr><td align="left"><code class="literal">-std=c++11</code></td><td align="left">Use the 2011 ISO C++ standard.</td></tr><tr><td align="left"><code class="literal">-std=gnu++11</code></td><td align="left">As directly above, with GNU extensions.</td></tr><tr><td align="left"><code class="literal">-std=c++14</code></td><td align="left">Use the 2014 ISO C++ standard.</td></tr><tr><td align="left"><code class="literal">-std=gnu++14</code></td><td align="left">As directly above, with GNU extensions.</td></tr><tr><td align="left"><code class="literal">-fexceptions</code></td><td align="left">See <a class="link" href="using_exceptions.html#intro.using.exception.no" title="Doing without">exception-free dialect</a></td></tr><tr><td align="left"><code class="literal">-frtti</code></td><td align="left">As above, but RTTI-free dialect.</td></tr><tr><td align="left"><code class="literal">-pthread</code> or <code class="literal">-pthreads</code></td><td align="left">For ISO C++11

libstdc++-v3/doc/html/manual/using_headers.html

@@ -74,12 +74,15 @@ of <code class="code">std::sinf</code>, <code class="code">std::sin</code>,
 and <code class="code">std::sinl</code>.
 </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="manual.intro.using.headers.pre"></a>Precompiled Headers</h3></div></div></div><p>There are three base header files that are provided. They can be
 used to precompile the standard headers and extensions into binary
-files that may the be used to speed compiles that use these headers.
+files that may then be used to speed up compilations that use these headers.
 </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>stdc++.h</p><p>Includes all standard headers. Actual content varies depending on
-language dialect.
+<a class="link" href="using.html#manual.intro.using.flags" title="Command Options">language dialect</a>.
 </p></li><li class="listitem"><p>stdtr1c++.h</p><p>Includes all of &lt;stdc++.h&gt;, and adds all the TR1 headers.
-</p></li><li class="listitem"><p>extc++.h</p><p>Includes all of &lt;stdtr1c++.h&gt;, and adds all the Extension headers.
-</p></li></ul></div><p>How to construct a .gch file from one of these base header files.</p><p>First, find the include directory for the compiler. One way to do
+</p></li><li class="listitem"><p>extc++.h</p><p>Includes all of &lt;stdc++.h&gt;, and adds all the Extension headers
+(and in C++98 mode also adds all the TR1 headers by including all of
+&lt;stdtr1c++.h&gt;).
+</p></li></ul></div><p>To construct a .gch file from one of these base header files,
+first find the include directory for the compiler. One way to do
 this is:</p><pre class="programlisting">
 g++ -v hello.cc
 

libstdc++-v3/doc/xml/manual/using.xml

@@ -16,7 +16,8 @@
       The standard library conforms to the dialect of C++ specified by the
       <option>-std</option> option passed to the compiler.
       By default, <command>g++</command> is equivalent to
-      <command>g++ -std=gnu++98</command>.
+      <command>g++ -std=gnu++14</command> since GCC 6, and
+      <command>g++ -std=gnu++98</command> for older releases.
     </para>
 
  <table frame="all" xml:id="table.cmd_options">
@@ -718,7 +719,7 @@ and <code>std::sinl</code>.
 
 <para>There are three base header files that are provided. They can be
 used to precompile the standard headers and extensions into binary
-files that may the be used to speed compiles that use these headers.
+files that may then be used to speed up compilations that use these headers.
 </para>
 
 
@@ -726,7 +727,7 @@ files that may the be used to speed compiles that use these headers.
 <listitem>
   <para>stdc++.h</para>
 <para>Includes all standard headers. Actual content varies depending on
-language dialect.
+<link linkend="manual.intro.using.flags">language dialect</link>.
 </para>
 </listitem>
 
@@ -737,13 +738,14 @@ language dialect.
 </listitem>
 
 <listitem><para>extc++.h</para>
-<para>Includes all of &lt;stdtr1c++.h&gt;, and adds all the Extension headers.
+<para>Includes all of &lt;stdc++.h&gt;, and adds all the Extension headers
+(and in C++98 mode also adds all the TR1 headers by including all of
+&lt;stdtr1c++.h&gt;).
 </para></listitem>
 </itemizedlist>
 
-<para>How to construct a .gch file from one of these base header files.</para>
-
-<para>First, find the include directory for the compiler. One way to do
+<para>To construct a .gch file from one of these base header files,
+first find the include directory for the compiler. One way to do
 this is:</para>
 
 <programlisting>

libstdc++-v3/include/precompiled/extc++.h

@@ -28,15 +28,25 @@
 
 #if __cplusplus < 201103L
 #include <bits/stdtr1c++.h>
+#else
+#include <bits/stdc++.h>
 #endif
 
 #include <ext/algorithm>
+#if __cplusplus >= 201103L
+# include <ext/aligned_buffer.h>
+#endif
+#include <ext/alloc_traits.h>
 #include <ext/array_allocator.h>
 #include <ext/atomicity.h>
 #include <ext/bitmap_allocator.h>
 #include <ext/cast.h>
+#if __cplusplus >= 201103L
+# include <ext/cmath>
+#endif
 #include <ext/concurrence.h>
 #include <ext/debug_allocator.h>
+#include <ext/enc_filebuf.h>
 #include <ext/extptr_allocator.h>
 #include <ext/functional>
 #include <ext/iterator>
@@ -45,9 +55,13 @@
 #include <ext/mt_allocator.h>
 #include <ext/new_allocator.h>
 #include <ext/numeric>
+#include <ext/numeric_traits.h>
 #include <ext/pod_char_traits.h>
 #include <ext/pointer.h>
 #include <ext/pool_allocator.h>
+#if __cplusplus >= 201103L
+# include <ext/random>
+#endif
 #include <ext/rb_tree>
 #include <ext/rope>
 #include <ext/slist>

libstdc++-v3/testsuite/17_intro/headers/c++1998/all_attributes.cc

@@ -35,7 +35,6 @@
 #define unused 1
 #endif
 
-#include <bits/stdc++.h> // TODO: this is missing from <bits/extc++.h>
 #include <bits/extc++.h>
 
 int

libstdc++-v3/testsuite/17_intro/headers/c++2011/67309.cc

@@ -19,5 +19,4 @@
 // { dg-do compile }
 
 // libstdc++/67309
-#include <bits/stdc++.h> // TODO: this is missing from <bits/extc++.h>
 #include <bits/extc++.h>

libstdc++-v3/testsuite/17_intro/headers/c++2011/all_attributes.cc

@@ -34,7 +34,6 @@
 #define unused 1
 #endif
 
-#include <bits/stdc++.h> // TODO: this is missing from <bits/extc++.h>
 #include <bits/extc++.h>
 
 int

libstdc++-v3/testsuite/17_intro/headers/c++2014/all_attributes.cc

@@ -34,8 +34,6 @@
 #define unused 1
 #endif
 
-#include <bits/stdc++.h> // TODO: this is missing from <bits/extc++.h>
-#include <shared_mutex>  // TODO: this is missing from <bits/stdc++.h>
 #include <bits/extc++.h>
 
 int

libstdc++-v3/testsuite/17_intro/headers/c++2014/all_no_exceptions.cc

@@ -0,0 +1,21 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++14 -fno-exceptions" }
+
+// 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/>.
+
+#include <bits/extc++.h>

libstdc++-v3/testsuite/17_intro/headers/c++2014/all_no_rtti.cc

@@ -0,0 +1,21 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++14 -fno-rtti" }
+
+// 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/>.
+
+#include <bits/extc++.h>

libstdc++-v3/testsuite/17_intro/headers/c++2014/all_pedantic_errors.cc

@@ -0,0 +1,21 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++14 -pedantic-errors" }
+
+// 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/>.
+
+#include <bits/extc++.h>

libstdc++-v3/testsuite/17_intro/headers/c++2014/operator_names.cc

@@ -0,0 +1,30 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++14 -fno-operator-names" }
+
+// 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/>.
+
+// libstdc++/47662
+
+// Avoid using PCH
+#include <cerrno>
+#include <bits/stdc++.h>
+#include <bits/stdtr1c++.h>
+#include <bits/extc++.h>
+
+int or, xor, and;
+

libstdc++-v3/testsuite/17_intro/headers/c++2014/stdc++.cc

@@ -0,0 +1,70 @@
+// FreeBSD wants warning clean system headers:
+// { dg-options "-Wall -Wsystem-headers" { target *-*-freebsd* *-*-dragonfly* } }
+// { dg-options "-std=gnu++14" }
+// { dg-do compile }
+
+// 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/>.
+
+// 17.4.1.2 Headers
+
+#include <bits/stdc++.h>
+
+// "C" compatibility headers
+#include <assert.h>
+#ifdef _GLIBCXX_HAVE_COMPLEX_H
+#include <complex.h>
+#endif
+#include <ctype.h>
+#include <errno.h>
+#ifdef _GLIBCXX_HAVE_FENV_H
+#include <fenv.h>
+#endif
+#include <float.h>
+#ifdef _GLIBCXX_HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+#include <iso646.h>
+#include <limits.h>
+#include <locale.h>
+#include <math.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdarg.h>
+#ifdef _GLIBCXX_HAVE_STDBOOL_H
+#include <stdbool.h>
+#endif
+#include <stddef.h>
+#ifdef _GLIBCXX_HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef _GLIBCXX_HAVE_TGMATH_H
+#include <tgmath.h>
+#endif
+#include <time.h>
+#if __has_include(<uchar.h>)
+#include <uchar.h>
+#endif
+#ifdef _GLIBCXX_HAVE_WCHAR_H
+#include <wchar.h>
+#endif
+#ifdef _GLIBCXX_HAVE_WCTYPE_H
+#include <wctype.h>
+#endif

libstdc++-v3/testsuite/17_intro/headers/c++2014/stdc++_multiple_inclusion.cc

@@ -0,0 +1,117 @@
+// FreeBSD wants warning clean system headers:
+// { dg-options "-Wall -Wsystem-headers" { target *-*-freebsd* *-*-dragonfly* } }
+// { dg-options "-std=gnu++14" }
+// { dg-do compile }
+
+// 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/>.
+
+// 17.4.1.2 Headers
+
+#include <bits/stdc++.h>
+
+// "C" compatibility headers
+#include <assert.h>
+#ifdef _GLIBCXX_HAVE_COMPLEX_H
+#include <complex.h>
+#endif
+#include <ctype.h>
+#include <errno.h>
+#ifdef _GLIBCXX_HAVE_FENV_H
+#include <fenv.h>
+#endif
+#include <float.h>
+#ifdef _GLIBCXX_HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+#include <iso646.h>
+#include <limits.h>
+#include <locale.h>
+#include <math.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdarg.h>
+#ifdef _GLIBCXX_HAVE_STDBOOL_H
+#include <stdbool.h>
+#endif
+#include <stddef.h>
+#ifdef _GLIBCXX_HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef _GLIBCXX_HAVE_TGMATH_H
+#include <tgmath.h>
+#endif
+#include <time.h>
+#if __has_include(<uchar.h>)
+#include <uchar.h>
+#endif
+#ifdef _GLIBCXX_HAVE_WCHAR_H
+#include <wchar.h>
+#endif
+#ifdef _GLIBCXX_HAVE_WCTYPE_H
+#include <wctype.h>
+#endif
+
+#include <bits/stdc++.h>
+
+// "C" compatibility headers
+#include <assert.h>
+#ifdef _GLIBCXX_HAVE_COMPLEX_H
+#include <complex.h>
+#endif
+#include <ctype.h>
+#include <errno.h>
+#ifdef _GLIBCXX_HAVE_FENV_H
+#include <fenv.h>
+#endif
+#include <float.h>
+#ifdef _GLIBCXX_HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+#include <iso646.h>
+#include <limits.h>
+#include <locale.h>
+#include <math.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdarg.h>
+#ifdef _GLIBCXX_HAVE_STDBOOL_H
+#include <stdbool.h>
+#endif
+#include <stddef.h>
+#ifdef _GLIBCXX_HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef _GLIBCXX_HAVE_TGMATH_H
+#include <tgmath.h>
+#endif
+#include <time.h>
+#if __has_include(<uchar.h>)
+#include <uchar.h>
+#endif
+#ifdef _GLIBCXX_HAVE_WCHAR_H
+#include <wchar.h>
+#endif
+#ifdef _GLIBCXX_HAVE_WCTYPE_H
+#include <wctype.h>
+#endif