https://gcc.gnu.org/g:5ecbe70d0f34ac9dadefc21c809fb6a2369d1bad
commit r16-2723-g5ecbe70d0f34ac9dadefc21c809fb6a2369d1bad
Author: Jakub Jelinek <ja...@redhat.com>
Date: Sun Aug 3 17:13:37 2025 +0200
libstdc++: Export std::owner_equal and std::owner_hash from std.cc
I've tried compiling
#include <bits/stdc++.h>
with -std=c++26 -fdump-lang-all
and
for i in `grep ^Class.std::[^_] *.C.001l.class | sed 's/^Class //;s/[<
].*$//' | sort -u | grep -v ::.*::`; do grep -q $i
/usr/src/gcc/libstdc++-v3/src/c++23/std.cc.in || echo $i;
+done
This printed
std::auto_ptr
std::binary_function
std::owner_equal
std::owner_hash
std::unary_function
where auto_ptr, binary_function and unary_function have been removed in
earlier
versions of C++ and owner_equal and owner_hash are missing.
The following patch adds them.
Wonder how to automatically discover other missing exports (like in PR121373
std::byteswap), maybe one could dig that stuff somehow from the raw
dump (look for identifiers in std namespace (and perhaps inlined namespaces
thereof at least) which don't start with underscore.
2025-08-03 Jakub Jelinek <ja...@redhat.com>
* src/c++23/std.cc.in (std::owner_equal, std::owner_hash): Export.
Diff:
---
libstdc++-v3/src/c++23/std.cc.in | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libstdc++-v3/src/c++23/std.cc.in b/libstdc++-v3/src/c++23/std.cc.in
index 9301ed90c00f..ec048f6f4f3a 100644
--- a/libstdc++-v3/src/c++23/std.cc.in
+++ b/libstdc++-v3/src/c++23/std.cc.in
@@ -1982,6 +1982,10 @@ export namespace std
using std::polymorphic;
namespace pmr { using std::pmr::polymorphic; }
#endif
+#if __cpp_lib_smart_ptr_owner_equality
+ using std::owner_equal;
+ using std::owner_hash;
+#endif
}
// 20.4 <memory_resource>
