Fix tests that fail with old std::string

	* testsuite/21_strings/basic_string/allocator/char/minimal.cc: Guard
	explicit instantiation with check for new ABI.
	* testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
	Likewise. Use wchar_t as char_type.

From-SVN: r228435

libstdc++-v3/ChangeLog

 2015-10-02  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/21_strings/basic_string/allocator/char/minimal.cc: Guard
+	explicit instantiation with check for new ABI.
+	* testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
+	Likewise. Use wchar_t as char_type.
+
 	* include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
 	(basic_string::front() const, basic_string::back() const): Use
 	noexcept instead of _GLIBCXX_NOEXCEPT macro.

libstdc++-v3/testsuite/21_strings/basic_string/allocator/char/minimal.cc

@@ -22,25 +22,27 @@
 #include <testsuite_hooks.h>
 #include <testsuite_allocator.h>
  
+#if _GLIBCXX_USE_CXX11_ABI
 using C = char;
 const C c = 'a';
 using traits = std::char_traits<C>;
 
 using __gnu_test::SimpleAllocator;
 
-template class std::basic_string<C,traits, SimpleAllocator<C>>;
+template class std::basic_string<C, traits, SimpleAllocator<C>>;
 
 void test01()
 {
-#if _GLIBCXX_USE_CXX11_ABI
   typedef SimpleAllocator<C> alloc_type;
   typedef std::allocator_traits<alloc_type> traits_type;
   typedef std::basic_string<C, traits, alloc_type> test_type;
   test_type v(alloc_type{});
   v.assign(1, c);
   v.assign(100, c);
-#endif
 }
+#else
+void test01() { }
+#endif
 
 int main()
 {

libstdc++-v3/testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc

@@ -22,7 +22,8 @@
 #include <testsuite_hooks.h>
 #include <testsuite_allocator.h>
  
-using C = char;
+#if _GLIBCXX_USE_CXX11_ABI && defined(_GLIBCXX_USE_WCHAR_T)
+using C = wchar_t;
 const C c = 'a';
 using traits = std::char_traits<C>;
 
@@ -32,18 +33,18 @@ template class std::basic_string<C,traits, SimpleAllocator<C>>;
 
 void test01()
 {
-#if _GLIBCXX_USE_CXX11_ABI && defined(_GLIBCXX_USE_WCHAR_T)
   typedef SimpleAllocator<C> alloc_type;
   typedef std::allocator_traits<alloc_type> traits_type;
   typedef std::basic_string<C, traits, alloc_type> test_type;
   test_type v(alloc_type{});
   v.assign(1, c);
   v.assign(100, c);
-#endif
 }
+#else
+void test01() { }
+#endif
 
 int main()
 {
   test01();
-  return 0;
 }