https://gcc.gnu.org/g:592bafb26eb1fd50979f6cdf2176897c4a02c281
commit r16-3654-g592bafb26eb1fd50979f6cdf2176897c4a02c281
Author: Jakub Jelinek <ja...@redhat.com>
Date: Mon Sep 8 11:49:58 2025 +0200
libstdc++: Fix up <ext/pointer.h> [PR121827]
During the tests mentioned in
https://gcc.gnu.org/pipermail/gcc-patches/2025-August/692482.html
(but dunno why I haven't noticed it back in August but only when testing
https://gcc.gnu.org/pipermail/gcc-patches/2025-September/694527.html )
I've noticed two ext header problems.
One is that #include <ext/pointer.h> got broken with the
r13-3037-g18f176d0b25591e28 change and since then is no longer
self-contained, as it includes iosfwd only if _GLIBCXX_HOSTED is defined
but doesn't actually include bits/c++config.h to make sure it is defined,
then includes a bunch of headers which do include bits/c++config.h and
finally uses in #if _GLIBCXX_HOSTED guarded code what is declared in iosfwd.
The other problem is that ext/cast.h is also not a self-contained header,
but that one has
/** @file ext/cast.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{ext/pointer.h}
*/
comment, so I think we just shouldn't include it in extc++.h and let
ext/pointer.h include it.
2025-09-08 Jakub Jelinek <ja...@redhat.com>
PR libstdc++/121827
* include/precompiled/extc++.h: Don't include ext/cast.h which is an
internal header.
* include/ext/pointer.h: Include bits/c++config.h before
#if _GLIBCXX_HOSTED.
Diff:
---
libstdc++-v3/include/ext/pointer.h | 1 +
libstdc++-v3/include/precompiled/extc++.h | 1 -
2 files changed, 1 insertion(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/ext/pointer.h
b/libstdc++-v3/include/ext/pointer.h
index 700c9a1685af..5feb9f052344 100644
--- a/libstdc++-v3/include/ext/pointer.h
+++ b/libstdc++-v3/include/ext/pointer.h
@@ -40,6 +40,7 @@
#pragma GCC system_header
#endif
+#include <bits/c++config.h>
#if _GLIBCXX_HOSTED
# include <iosfwd>
#endif
diff --git a/libstdc++-v3/include/precompiled/extc++.h
b/libstdc++-v3/include/precompiled/extc++.h
index cc6e5e52a642..9d41656f2803 100644
--- a/libstdc++-v3/include/precompiled/extc++.h
+++ b/libstdc++-v3/include/precompiled/extc++.h
@@ -37,7 +37,6 @@
#endif
#include <ext/alloc_traits.h>
#include <ext/atomicity.h>
-#include <ext/cast.h>
#include <ext/iterator>
#include <ext/numeric_traits.h>
#include <ext/pointer.h>
