[PATCH] Fix gnu-versioned-namespace build

[François Dumont]

I plan to commit this tomorrow.

Note that rather than just adding the missing 
_GLIBCXX_[BEGIN,END]_VERSION_NAMESPACE I also move anonymous namespace 
usage outside std namespace. Let me know if it was intentional.

    * src/c++11/random.cc: Add _GLIBCXX_BEGIN_NAMESPACE_VERSION and
    _GLIBCXX_END_NAMESPACE_VERSION. Move anonymous namespace outside std
    namespace.

Tested under Linux x86_64 normal/debug/versioned namespace modes.

There are still tests failing in versioned namespace, more patches to come.

François

diff --git a/libstdc++-v3/src/c++11/random.cc b/libstdc++-v3/src/c++11/random.cc
index 10fbe1dc4c4..d4ebc9556ab 100644
--- a/libstdc++-v3/src/c++11/random.cc
+++ b/libstdc++-v3/src/c++11/random.cc
@@ -73,8 +73,6 @@
 # define USE_MT19937 1
 #endif
 
-namespace std _GLIBCXX_VISIBILITY(default)
-{
 namespace
 {
 #if USE_RDRAND
@@ -124,6 +122,10 @@ namespace std _GLIBCXX_VISIBILITY(default)
 #endif
 }
 
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
   void
   random_device::_M_init(const std::string& token)
   {
@@ -286,7 +288,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
     _M_mt.seed(seed);
 #else
     // Convert old default token "mt19937" or numeric seed tokens to "default".
-    if (token == "mt19937" || isdigit((unsigned char)token[0]))
+    if (token == "mt19937" || std::isdigit((unsigned char)token[0]))
       _M_init("default");
     else
       _M_init(token);
@@ -407,5 +409,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
     0x9d2c5680UL, 15,
     0xefc60000UL, 18, 1812433253UL>;
 #endif // USE_MT19937
-}
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace std
 #endif // _GLIBCXX_USE_C99_STDINT_TR1