[PATCH] libstdc++: fix possible undefined std::timespec in module std

[yxj-github-437]

I notice std::timespec and std::timespec_get are used in preprocessor
condition _GLIBCXX_HAVE_TIMESPEC_GET. So in module std, it should be
the same.

libstdc++-v3:
        * src/c++23/std-clib.cc.in: move std::timespec in preprocessor
        condition _GLIBCXX_HAVE_TIMESPEC_GET
---
 libstdc++-v3/src/c++23/std-clib.cc.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/src/c++23/std-clib.cc.in 
b/libstdc++-v3/src/c++23/std-clib.cc.in
index 6809ad229d7..10fc03e7ce0 100644
--- a/libstdc++-v3/src/c++23/std-clib.cc.in
+++ b/libstdc++-v3/src/c++23/std-clib.cc.in
@@ -585,9 +585,9 @@ export C_LIB_NAMESPACE
   using std::strftime;
   using std::time;
   using std::time_t;
-  using std::timespec;
   using std::tm;
 #ifdef _GLIBCXX_HAVE_TIMESPEC_GET
+  using std::timespec;
   using std::timespec_get;
 #endif
 }
-- 
2.43.0