More fine-grained autoconf checks for C99 library

2015-11-13  Jennifer Yao  <jenny.hyphen.fa@gmail.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/58393
	PR libstdc++/61580
	* acinclude.m4 (GLIBCXX_ENABLE_C99): Perform tests twice, with
	-std=c++11 as well as -std=c++98, and define separate macros for each.
	Cache the results of checking for complex math and wide character
	functions. Reformat for readability.
	* config.h.in: Regenerate.
	* include/bits/c++config: Define _GLIBCXX_USE_C99_XXX macros to
	either _GLIBCXX98_USE_C99_XXX or _GLIBCXX11_USE_C99_XXX according to
	language standard in use.
	* config/locale/dragonfly/c_locale.h (std::__convert_from_v): Replace
	_GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_STDIO.
	* config/locale/generic/c_locale.h (std::__convert_from_v): Likewise.
	* config/locale/gnu/c_locale.h (std::__convert_from_v): Likewise.
	* config/os/bsd/dragonfly/os_defines.h: Define _GLIBCXX_USE_C99_STDIO,
	_GLIBCXX_USE_C99_STDLIB, and _GLIBCXX_USE_C99_WCHAR.
	* configure: Regenerate.
	* include/bits/basic_string.h: Make numeric conversion functions
	depend on _GLIBCXX_USE_C99_STDIO, _GLIBCXX_USE_C99_STDLIB, or
	_GLIBCXX_USE_C99_WCHAR, instead of _GLIBCXX_USE_C99.
	* include/ext/vstring.h: Likewise.
	* include/bits/locale_facets.tcc (std::num_put::_M_insert_float):
	Replace _GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_STDIO.
	* include/bits/locale_facets_nonio.tcc (std::money_put::do_put):
	Likewise.
	* include/c_compatibility/math.h: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_MATH.
	* include/c_compatibility/wchar.h: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_WCHAR.
	* include/c_global/cstdio: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDIO.
	* include/c_global/cstdlib: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDLIB.
	* include/c_global/cwchar: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_WCHAR.
	* include/c_std/cstdio: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDIO.
	* include/c_std/cstdlib: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDLIB.
	* include/c_std/cwchar: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_WCHAR.
	* include/tr1/cstdio: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDIO.
	* include/tr1/cstdlib: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDLIB.
	* include/tr1/cwchar: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_WCHAR.
	* include/tr1/stdlib.h: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDLIB.
	* src/c++98/locale_facets.cc (std::__num_base::_S_format_float):
	Replace _GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_STDIO.
	* testsuite/18_support/exception_ptr/60612-terminate.cc: Replace
	_GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_STDLIB.
	* testsuite/18_support/exception_ptr/60612-unexpected.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stod.cc
	(test01): Replace _GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_WCHAR.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	stof.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	stoi.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	stol.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	stold.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	stoll.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	stoul.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	stoull.cc: Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/
	to_wstring.cc: Likewise.
	* testsuite/26_numerics/headers/cstdlib/13943.cc: Replace
	_GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_STDLIB.
	* testsuite/26_numerics/headers/cstdlib/types_std_c++0x.cc: Likewise.
	* testsuite/lib/libstdc++.exp (check_v3_target_string_conversions):
	Change preprocessor #if conditional so that it uses
	_GLIBCXX_USE_C99_STDIO, _GLIBCXX_USE_C99_STDLIB, and
	_GLIBCXX_USE_C99_WCHAR, instead of _GLIBCXX_USE_C99.
	* testsuite/tr1/8_c_compatibility/cmath/templates.cc: Replace
	_GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_MATH.
	* testsuite/tr1/8_c_compatibility/cstdio/functions.cc: Replace
	_GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_STDIO.
	* testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Replace
	_GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_STDLIB.
	* testsuite/tr1/8_c_compatibility/cstdlib/types_std_tr1.cc: Likewise.
	* testsuite/tr1/8_c_compatibility/cwchar/functions.cc: Replace
	_GLIBCXX_USE_C99 with _GLIBCXX_USE_C99_WCHAR.
	* testsuite/util/testsuite_fs.h: Replace _GLIBCXX_USE_C99 with
	_GLIBCXX_USE_C99_STDIO.

Co-Authored-By: Jonathan Wakely <jwakely@redhat.com>

From-SVN: r230324

18 files changed, 81 insertions, 37 deletions

diff --git a/libstdc++-v3/include/bits/basic_string.h b/libstdc++-v3/include/bits/basic_string.h
index 35246d9..b3853cd 100644
--- a/libstdc++-v3/include/bits/basic_string.h
+++ b/libstdc++-v3/include/bits/basic_string.h
@@ -5387,7 +5387,7 @@ _GLIBCXX_END_NAMESPACE_CXX11
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
-#if __cplusplus >= 201103L && defined(_GLIBCXX_USE_C99)
+#if __cplusplus >= 201103L
 
 #include <ext/string_conversions.h>
 
@@ -5396,6 +5396,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 _GLIBCXX_BEGIN_NAMESPACE_CXX11
 
+#if _GLIBCXX_USE_C99_STDLIB
   // 21.4 Numeric Conversions [string.conversions].
   inline int
   stoi(const string& __str, size_t* __idx = 0, int __base = 10)
@@ -5434,7 +5435,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
   inline long double
   stold(const string& __str, size_t* __idx = 0)
   { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
+#endif // _GLIBCXX_USE_C99_STDLIB
 
+#if _GLIBCXX_USE_C99_STDIO
   // NB: (v)snprintf vs sprintf.
 
   // DR 1261.
@@ -5498,8 +5501,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
     return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
 					   "%Lf", __val);
   }
+#endif // _GLIBCXX_USE_C99_STDIO
 
-#ifdef _GLIBCXX_USE_WCHAR_T
+#if defined(_GLIBCXX_USE_WCHAR_T) && defined(_GLIBCXX_USE_C99_WCHAR)
   inline int 
   stoi(const wstring& __str, size_t* __idx = 0, int __base = 10)
   { return __gnu_cxx::__stoa<long, int>(&std::wcstol, "stoi", __str.c_str(),
@@ -5601,13 +5605,13 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
 					    L"%Lf", __val);
   }
 #endif // _GLIBCXX_HAVE_BROKEN_VSWPRINTF
-#endif
+#endif // _GLIBCXX_USE_WCHAR_T && _GLIBCXX_USE_C99_WCHAR
 
 _GLIBCXX_END_NAMESPACE_CXX11
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
-#endif /* C++11 && _GLIBCXX_USE_C99 ... */
+#endif /* C++11 */
 
 #if __cplusplus >= 201103L
 
diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config
index 924f13e..723feb1 100644
--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -529,4 +529,40 @@ namespace std
 #undef min
 #undef max
 
+// N.B. these _GLIBCXX_USE_C99_XXX macros are defined unconditionally
+// so they should be tested with #if not with #ifdef.
+#if __cplusplus >= 201103L
+# ifndef _GLIBCXX_USE_C99_MATH
+#  define _GLIBCXX_USE_C99_MATH _GLIBCXX11_USE_C99_MATH
+# endif
+# ifndef _GLIBCXX_USE_C99_COMPLEX
+# define _GLIBCXX_USE_C99_COMPLEX _GLIBCXX11_USE_C99_COMPLEX
+# endif
+# ifndef _GLIBCXX_USE_C99_STDIO
+# define _GLIBCXX_USE_C99_STDIO _GLIBCXX11_USE_C99_STDIO
+# endif
+# ifndef _GLIBCXX_USE_C99_STDLIB
+# define _GLIBCXX_USE_C99_STDLIB _GLIBCXX11_USE_C99_STDLIB
+# endif
+# ifndef _GLIBCXX_USE_C99_WCHAR
+# define _GLIBCXX_USE_C99_WCHAR _GLIBCXX11_USE_C99_WCHAR
+# endif
+#else
+# ifndef _GLIBCXX_USE_C99_MATH
+#  define _GLIBCXX_USE_C99_MATH _GLIBCXX98_USE_C99_MATH
+# endif
+# ifndef _GLIBCXX_USE_C99_COMPLEX
+# define _GLIBCXX_USE_C99_COMPLEX _GLIBCXX98_USE_C99_COMPLEX
+# endif
+# ifndef _GLIBCXX_USE_C99_STDIO
+# define _GLIBCXX_USE_C99_STDIO _GLIBCXX98_USE_C99_STDIO
+# endif
+# ifndef _GLIBCXX_USE_C99_STDLIB
+# define _GLIBCXX_USE_C99_STDLIB _GLIBCXX98_USE_C99_STDLIB
+# endif
+# ifndef _GLIBCXX_USE_C99_WCHAR
+# define _GLIBCXX_USE_C99_WCHAR _GLIBCXX98_USE_C99_WCHAR
+# endif
+#endif
+
 // End of prewritten config; the settings discovered at configure time follow.
diff --git a/libstdc++-v3/include/bits/locale_facets.tcc b/libstdc++-v3/include/bits/locale_facets.tcc
index bd58771..2db2d83 100644
--- a/libstdc++-v3/include/bits/locale_facets.tcc
+++ b/libstdc++-v3/include/bits/locale_facets.tcc
@@ -959,13 +959,13 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
     }
 
   // The following code uses vsnprintf (or vsprintf(), when
-  // _GLIBCXX_USE_C99 is not defined) to convert floating point values
-  // for insertion into a stream.  An optimization would be to replace
-  // them with code that works directly on a wide buffer and then use
-  // __pad to do the padding.  It would be good to replace them anyway
-  // to gain back the efficiency that C++ provides by knowing up front
-  // the type of the values to insert.  Also, sprintf is dangerous
-  // since may lead to accidental buffer overruns.  This
+  // _GLIBCXX_USE_C99_STDIO is not defined) to convert floating point
+  // values for insertion into a stream.  An optimization would be to
+  // replace them with code that works directly on a wide buffer and
+  // then use __pad to do the padding.  It would be good to replace
+  // them anyway to gain back the efficiency that C++ provides by
+  // knowing up front the type of the values to insert.  Also, sprintf
+  // is dangerous since may lead to accidental buffer overruns.  This
   // implementation follows the C++ standard fairly directly as
   // outlined in 22.2.2.2 [lib.locale.num.put]
   template<typename _CharT, typename _OutIter>
@@ -992,7 +992,7 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL
 	char __fbuf[16];
 	__num_base::_S_format_float(__io, __fbuf, __mod);
 
-#ifdef _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDIO
 	// Precision is always used except for hexfloat format.
 	const bool __use_prec =
 	  (__io.flags() & ios_base::floatfield) != ios_base::floatfield;
diff --git a/libstdc++-v3/include/bits/locale_facets_nonio.tcc b/libstdc++-v3/include/bits/locale_facets_nonio.tcc
index 2e73b5d..631ef53 100644
--- a/libstdc++-v3/include/bits/locale_facets_nonio.tcc
+++ b/libstdc++-v3/include/bits/locale_facets_nonio.tcc
@@ -578,7 +578,7 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL_OR_CXX11
     {
       const locale __loc = __io.getloc();
       const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
-#ifdef _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDIO
       // First try a buffer perhaps big enough.
       int __cs_size = 64;
       char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
@@ -751,7 +751,7 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
 		case 'S':
 		  // Seconds. [tm_sec]
 		  // [00, 60] in C99 (one leap-second), [00, 61] in C89.
-#ifdef _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99
 		  __beg = _M_extract_num(__beg, __end, __tm->tm_sec, 0, 60, 2,
 #else
 		  __beg = _M_extract_num(__beg, __end, __tm->tm_sec, 0, 61, 2,
diff --git a/libstdc++-v3/include/c_compatibility/math.h b/libstdc++-v3/include/c_compatibility/math.h
index d6acb6d..7729896 100644
--- a/libstdc++-v3/include/c_compatibility/math.h
+++ b/libstdc++-v3/include/c_compatibility/math.h
@@ -56,7 +56,7 @@ using std::fabs;
 using std::floor;
 using std::fmod;
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_MATH
 using std::fpclassify;
 using std::isfinite;
 using std::isinf;
diff --git a/libstdc++-v3/include/c_compatibility/wchar.h b/libstdc++-v3/include/c_compatibility/wchar.h
index 06b5d47..3bc12d0 100644
--- a/libstdc++-v3/include/c_compatibility/wchar.h
+++ b/libstdc++-v3/include/c_compatibility/wchar.h
@@ -103,7 +103,7 @@ using std::wmemmove;
 using std::wmemset;
 using std::wcsftime;
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_WCHAR
 using std::wcstold;
 using std::wcstoll;
 using std::wcstoull;
diff --git a/libstdc++-v3/include/c_global/cstdio b/libstdc++-v3/include/c_global/cstdio
index d1c958b..486cee9 100644
--- a/libstdc++-v3/include/c_global/cstdio
+++ b/libstdc++-v3/include/c_global/cstdio
@@ -146,7 +146,7 @@ namespace std
   using ::vsprintf;
 } // namespace
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDIO
 
 #undef snprintf
 #undef vfscanf
@@ -189,6 +189,6 @@ namespace std
   using ::__gnu_cxx::vsscanf;
 } // namespace std
 
-#endif // _GLIBCXX_USE_C99
+#endif // _GLIBCXX_USE_C99_STDIO
 
 #endif
diff --git a/libstdc++-v3/include/c_global/cstdlib b/libstdc++-v3/include/c_global/cstdlib
index 7e9bb30..a2f44fc 100644
--- a/libstdc++-v3/include/c_global/cstdlib
+++ b/libstdc++-v3/include/c_global/cstdlib
@@ -195,7 +195,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDLIB
 
 #undef _Exit
 #undef llabs
@@ -266,7 +266,7 @@ namespace std
   using ::__gnu_cxx::strtold;
 } // namespace std
 
-#endif // _GLIBCXX_USE_C99
+#endif // _GLIBCXX_USE_C99_STDLIB
 
 #endif // !_GLIBCXX_HOSTED
 
diff --git a/libstdc++-v3/include/c_global/cwchar b/libstdc++-v3/include/c_global/cwchar
index dddb409..1571463 100644
--- a/libstdc++-v3/include/c_global/cwchar
+++ b/libstdc++-v3/include/c_global/cwchar
@@ -232,7 +232,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_WCHAR
 
 #undef wcstold
 #undef wcstoll
@@ -289,7 +289,7 @@ namespace std
   using std::vwscanf;
 #endif
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_WCHAR
   using std::wcstold;
   using std::wcstoll;
   using std::wcstoull;
diff --git a/libstdc++-v3/include/c_std/cstdio b/libstdc++-v3/include/c_std/cstdio
index 37f01ca..b7860f9 100644
--- a/libstdc++-v3/include/c_std/cstdio
+++ b/libstdc++-v3/include/c_std/cstdio
@@ -144,7 +144,7 @@ namespace std
   using ::vsprintf;
 } // namespace std
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDIO
 
 #undef snprintf
 #undef vfscanf
diff --git a/libstdc++-v3/include/c_std/cstdlib b/libstdc++-v3/include/c_std/cstdlib
index 0bd7058..7b69884 100644
--- a/libstdc++-v3/include/c_std/cstdlib
+++ b/libstdc++-v3/include/c_std/cstdlib
@@ -192,7 +192,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDLIB
 
 #undef _Exit
 #undef llabs
@@ -263,7 +263,7 @@ namespace std
   using ::__gnu_cxx::strtold;
 } // namespace std
 
-#endif // _GLIBCXX_USE_C99
+#endif // _GLIBCXX_USE_C99_STDLIB
 
 #endif // !_GLIBCXX_HOSTED
 
diff --git a/libstdc++-v3/include/c_std/cwchar b/libstdc++-v3/include/c_std/cwchar
index aa1b2fa..5aade7f 100644
--- a/libstdc++-v3/include/c_std/cwchar
+++ b/libstdc++-v3/include/c_std/cwchar
@@ -228,7 +228,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_WCHAR
 
 #undef wcstold
 #undef wcstoll
diff --git a/libstdc++-v3/include/ext/vstring.h b/libstdc++-v3/include/ext/vstring.h
index 68acd57..8732bd3 100644
--- a/libstdc++-v3/include/ext/vstring.h
+++ b/libstdc++-v3/include/ext/vstring.h
@@ -2680,7 +2680,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
-#if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99))
+#if __cplusplus >= 201103L
 
 #include <ext/string_conversions.h>
 
@@ -2688,6 +2688,7 @@ namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
 {
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
+#if _GLIBCXX_USE_C99_STDLIB
   // 21.4 Numeric Conversions [string.conversions].
   inline int
   stoi(const __vstring& __str, std::size_t* __idx = 0, int __base = 10)
@@ -2726,7 +2727,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   inline long double
   stold(const __vstring& __str, std::size_t* __idx = 0)
   { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
+#endif // _GLIBCXX_USE_C99_STDLIB
 
+#if _GLIBCXX_USE_C99_STDIO
   // NB: (v)snprintf vs sprintf.
 
   // DR 1261.
@@ -2789,8 +2792,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     return __gnu_cxx::__to_xstring<__vstring>(&std::vsnprintf, __n,
 					      "%Lf", __val);
   }
+#endif // _GLIBCXX_USE_C99_STDIO
 
-#ifdef _GLIBCXX_USE_WCHAR_T
+#if defined(_GLIBCXX_USE_WCHAR_T) && defined(_GLIBCXX_USE_C99_WCHAR)
   inline int 
   stoi(const __wvstring& __str, std::size_t* __idx = 0, int __base = 10)
   { return __gnu_cxx::__stoa<long, int>(&std::wcstol, "stoi", __str.c_str(),
@@ -2890,8 +2894,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     return __gnu_cxx::__to_xstring<__wvstring>(&std::vswprintf, __n,
 					       L"%Lf", __val);
   }
-#endif
-#endif
+#endif // _GLIBCXX_HAVE_BROKEN_VSWPRINTF
+#endif // _GLIBCXX_USE_WCHAR_T && _GLIBCXX_USE_C99_WCHAR
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/include/std/complex b/libstdc++-v3/include/std/complex
index 5ed4fd5..f1d3b79 100644
--- a/libstdc++-v3/include/std/complex
+++ b/libstdc++-v3/include/std/complex
@@ -995,7 +995,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     complex<_Tp>
     pow(const complex<_Tp>& __x, const _Tp& __y)
     {
-#ifndef _GLIBCXX_USE_C99_COMPLEX
+#if ! _GLIBCXX_USE_C99_COMPLEX
       if (__x == _Tp())
 	return _Tp();
 #endif
@@ -1831,7 +1831,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     arg(_Tp __x)
     {
       typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
-#if (_GLIBCXX_USE_C99_MATH && !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC)
+#if (_GLIBCXX11_USE_C99_MATH && !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC)
       return std::signbit(__x) ? __type(3.1415926535897932384626433832795029L)
 	                       : __type();
 #else
diff --git a/libstdc++-v3/include/tr1/cstdio b/libstdc++-v3/include/tr1/cstdio
index 7681823..b8fc04f 100644
--- a/libstdc++-v3/include/tr1/cstdio
+++ b/libstdc++-v3/include/tr1/cstdio
@@ -33,7 +33,7 @@
 
 #include <cstdio>
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDIO
 
 namespace std _GLIBCXX_VISIBILITY(default)
 {
diff --git a/libstdc++-v3/include/tr1/cstdlib b/libstdc++-v3/include/tr1/cstdlib
index c3c65eb..35a9133 100644
--- a/libstdc++-v3/include/tr1/cstdlib
+++ b/libstdc++-v3/include/tr1/cstdlib
@@ -35,7 +35,7 @@
 
 #if _GLIBCXX_HOSTED
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDLIB
 
 namespace std _GLIBCXX_VISIBILITY(default)
 {
@@ -65,7 +65,7 @@ namespace tr1
 }
 }
 
-#endif // _GLIBCXX_USE_C99 
+#endif // _GLIBCXX_USE_C99_STDLIB
 
 #endif // _GLIBCXX_HOSTED
 
diff --git a/libstdc++-v3/include/tr1/cwchar b/libstdc++-v3/include/tr1/cwchar
index 10772ee..0db2262 100644
--- a/libstdc++-v3/include/tr1/cwchar
+++ b/libstdc++-v3/include/tr1/cwchar
@@ -52,7 +52,7 @@ namespace tr1
   using std::vwscanf;
 #endif
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_WCHAR
   using std::wcstold;
   using std::wcstoll;
   using std::wcstoull;
diff --git a/libstdc++-v3/include/tr1/stdlib.h b/libstdc++-v3/include/tr1/stdlib.h
index 310c7bc..5e826d6 100644
--- a/libstdc++-v3/include/tr1/stdlib.h
+++ b/libstdc++-v3/include/tr1/stdlib.h
@@ -33,7 +33,7 @@
 
 #if _GLIBCXX_HOSTED
 
-#if _GLIBCXX_USE_C99
+#if _GLIBCXX_USE_C99_STDLIB
 
 using std::tr1::atoll;
 using std::tr1::strtoll;