[committed] libstdc++: Remove redundant dependencies on _GLIBCXX_USE_C99_STDINT_TR1

[Jonathan Wakely <jwakely@redhat.com>]

Tested powerpc64le-linux. Pushed to trunk.

-- >8 --

We never need to use std::make_unsigned in std::char_traits<char16_t>
and std::char_traits<char32_t> because <cstdint> guarantees to provide
the types we need, since r9-2028-g8ba7f29e3dd064.

Similarly, experimental::source_location can just assume uint_least32_t
is defined by <cstdint>.

libstdc++-v3/ChangeLog:

	* include/bits/char_traits.h (char_traits<char16_t>): Do not
	depend on _GLIBCXX_USE_C99_STDINT_TR1.
	(char_traits<char32_t>): Likewise.
	* include/experimental/source_location: Likewise.
---
 libstdc++-v3/include/bits/char_traits.h           | 8 ++------
 libstdc++-v3/include/experimental/source_location | 6 ------
 2 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/libstdc++-v3/include/bits/char_traits.h b/libstdc++-v3/include/bits/char_traits.h
index 68ed827f982..0928137854b 100644
--- a/libstdc++-v3/include/bits/char_traits.h
+++ b/libstdc++-v3/include/bits/char_traits.h
@@ -762,10 +762,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       typedef char16_t          char_type;
 #ifdef __UINT_LEAST16_TYPE__
       typedef __UINT_LEAST16_TYPE__	    int_type;
-#elif defined _GLIBCXX_USE_C99_STDINT_TR1
-      typedef uint_least16_t    int_type;
 #else
-      typedef make_unsigned<char16_t>::type int_type;
+      typedef uint_least16_t    int_type;
 #endif
 #if _GLIBCXX_HOSTED
       typedef streamoff         off_type;
@@ -891,10 +889,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       typedef char32_t          char_type;
 #ifdef __UINT_LEAST32_TYPE__
       typedef __UINT_LEAST32_TYPE__	    int_type;
-#elif defined _GLIBCXX_USE_C99_STDINT_TR1
-      typedef uint_least32_t    int_type;
 #else
-      typedef make_unsigned<char32_t>::type int_type;
+      typedef uint_least32_t    int_type;
 #endif
 #if _GLIBCXX_HOSTED
       typedef streamoff         off_type;
diff --git a/libstdc++-v3/include/experimental/source_location b/libstdc++-v3/include/experimental/source_location
index 1dfce7343c6..ee94a36cc43 100644
--- a/libstdc++-v3/include/experimental/source_location
+++ b/libstdc++-v3/include/experimental/source_location
@@ -44,12 +44,6 @@ inline namespace fundamentals_v2 {
 
   struct source_location
   {
-#ifndef _GLIBCXX_USE_C99_STDINT_TR1
-  private:
-    using uint_least32_t = unsigned;
-  public:
-#endif
-
     // 14.1.2, source_location creation
     static constexpr source_location
     current(const char* __file = __builtin_FILE(),
-- 
2.40.1