Make all <cxxx> headers include <bits/c++config.h>

	PR libstdc++/65473
	* include/c/cassert: Include <bits/c++config.h>.
	* include/c/cerrno: Likewise.
	* include/c/cfloat: Likewise.
	* include/c/ciso646: Likewise.
	* include/c/climits: Likewise.
	* include/c_global/cassert: Likewise.
	* include/c_global/cerrno: Likewise.
	* include/c_global/cfloat: Likewise.
	* include/c_global/ciso646: Likewise.
	* include/c_global/climits: Likewise.
	* include/c_std/cassert: Likewise.
	* include/c_std/cerrno: Likewise.
	* include/c_std/cfloat: Likewise.
	* include/c_std/ciso646: Likewise.
	* include/c_std/climits: Likewise.

From-SVN: r227484

libstdc++-v3/ChangeLog

+2015-09-04  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/65473
+	* include/c/cassert: Include <bits/c++config.h>.
+	* include/c/cerrno: Likewise.
+	* include/c/cfloat: Likewise.
+	* include/c/ciso646: Likewise.
+	* include/c/climits: Likewise.
+	* include/c_global/cassert: Likewise.
+	* include/c_global/cerrno: Likewise.
+	* include/c_global/cfloat: Likewise.
+	* include/c_global/ciso646: Likewise.
+	* include/c_global/climits: Likewise.
+	* include/c_std/cassert: Likewise.
+	* include/c_std/cerrno: Likewise.
+	* include/c_std/cfloat: Likewise.
+	* include/c_std/ciso646: Likewise.
+	* include/c_std/climits: Likewise.
+
 2015-09-03  Jonathan Wakely  <jwakely@redhat.com>
 
 	* include/bits/shared_ptr_base.h: Add required header.

libstdc++-v3/include/c/cassert

@@ -30,4 +30,5 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include_next <assert.h>

libstdc++-v3/include/c/cerrno

@@ -40,6 +40,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include_next <errno.h>
 
 // Adhere to section 17.4.1.2 clause 5 of ISO 14882:1998

libstdc++-v3/include/c/cfloat

@@ -31,6 +31,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include_next <float.h>
 
 #endif

libstdc++-v3/include/c/ciso646

@@ -27,6 +27,12 @@
  *  in your programs, rather than any of the "*.h" implementation files.
  *
  *  This is the C++ version of the Standard C Library header @c iso646.h,
- *  and its contents are (mostly) the same as that header, but are all
- *  contained in the namespace @c std.
+ *  which is empty in C++.
  */
+#ifndef _GLIBCXX_CISO646
+#define _GLIBCXX_CISO646
+
+#pragma GCC system_header
+
+#include <bits/c++config.h>
+#endif

libstdc++-v3/include/c/climits

@@ -31,6 +31,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include_next <limits.h>
 
 #endif

libstdc++-v3/include/c_global/cassert

@@ -40,4 +40,5 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <assert.h>

libstdc++-v3/include/c_global/cerrno

@@ -38,6 +38,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <errno.h>
 
 #ifndef _GLIBCXX_CERRNO

libstdc++-v3/include/c_global/cfloat

@@ -38,6 +38,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <float.h>
 
 #ifndef _GLIBCXX_CFLOAT

libstdc++-v3/include/c_global/ciso646

@@ -27,7 +27,12 @@
  *  in your programs, rather than any of the @a *.h implementation files.
  *
  *  This is the C++ version of the Standard C Library header @c iso646.h,
- *  and its contents are (mostly) the same as that header, but are all
- *  contained in the namespace @c std (except for names which are defined
- *  as macros in C).
+ *  which is empty in C++.
  */
+#ifndef _GLIBCXX_CISO646
+#define _GLIBCXX_CISO646
+
+#pragma GCC system_header
+
+#include <bits/c++config.h>
+#endif

libstdc++-v3/include/c_global/climits

@@ -38,6 +38,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <limits.h>
 
 #ifndef _GLIBCXX_CLIMITS

libstdc++-v3/include/c_std/cassert

@@ -40,4 +40,5 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <assert.h>

libstdc++-v3/include/c_std/cerrno

@@ -41,6 +41,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <errno.h>
 
 // Adhere to section 17.4.1.2 clause 5 of ISO 14882:1998

libstdc++-v3/include/c_std/cfloat

@@ -41,6 +41,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <float.h>
 
 #endif

libstdc++-v3/include/c_std/ciso646

@@ -27,7 +27,12 @@
  *  in your programs, rather than any of the @a *.h implementation files.
  *
  *  This is the C++ version of the Standard C Library header @c iso646.h,
- *  and its contents are (mostly) the same as that header, but are all
- *  contained in the namespace @c std (except for names which are defined
- *  as macros in C).
+ *  which is empty in C++.
  */
+#ifndef _GLIBCXX_CISO646
+#define _GLIBCXX_CISO646
+
+#pragma GCC system_header
+
+#include <bits/c++config.h>
+#endif

libstdc++-v3/include/c_std/climits

@@ -41,6 +41,7 @@
 
 #pragma GCC system_header
 
+#include <bits/c++config.h>
 #include <limits.h>
 
 #endif