libstdc++: Fix module std export for std::extents

libstdc++-v3/ChangeLog:

	* src/c++23/std.cc.in: Fix export for std::extents.

diff --git a/libstdc++-v3/src/c++23/std.cc.in b/libstdc++-v3/src/c++23/std.cc.in
index 0df27cd7e7dadb338243094cee487ca05fb5a6e9..73316d168c948b3df7445185c8ad9e7891e332d6 100644 (file)
--- a/libstdc++-v3/src/c++23/std.cc.in
+++ b/libstdc++-v3/src/c++23/std.cc.in
@@ -1834,10 +1834,13 @@ export namespace std
 }
 
 // <mdspan>
+#if __glibcxx_mdspan
+export namespace std
 {
   using std::extents;
   // FIXME layout_*, default_accessor and mdspan
 }
+#endif
 
 // 20.2 <memory>
 export namespace std