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-rw-r--r--libcxx/docs/ReleaseNotes/19.rst3
-rw-r--r--libcxx/docs/Status/Cxx2cPapers.csv2
-rw-r--r--libcxx/docs/UsingLibcxx.rst5
-rw-r--r--libcxx/docs/index.rst2
-rw-r--r--libcxx/include/__chrono/tzdb.h35
-rw-r--r--libcxx/include/__chrono/tzdb_list.h10
-rw-r--r--libcxx/include/chrono5
-rw-r--r--libcxx/include/strstream12
-rw-r--r--libcxx/modules/std/chrono.inc4
-rw-r--r--libcxx/modules/std/strstream.inc2
-rw-r--r--libcxx/src/tzdb.cpp59
-rw-r--r--libcxx/test/libcxx/atomics/diagnose_invalid_memory_order.verify.cpp2
-rw-r--r--libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.compile.pass.cpp8
-rw-r--r--libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.verify.cpp8
-rw-r--r--libcxx/test/libcxx/ranges/range.adaptors/range.lazy.split/no_unique_address.compile.pass.cpp2
-rw-r--r--libcxx/test/libcxx/ranges/range.adaptors/range.split/no_unique_address.compile.pass.cpp2
-rw-r--r--libcxx/test/libcxx/ranges/range.factories/range.istream.view/no_unique_address.compile.pass.cpp2
-rw-r--r--libcxx/test/libcxx/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp84
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp_size.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp_size.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/rdbuf.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/str.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.verify.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/types.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/cp_size_mode.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/default.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/freeze.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/pcount.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/rdbuf.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/str.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.verify.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/types.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/cp_size_mode.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/default.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.dest/rdbuf.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/freeze.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/pcount.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/str.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.verify.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstream/types.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ccp_size.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cp_size_cp.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cscp_size.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cucp_size.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/custom_alloc.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/default.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/scp_size_scp.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ucp_size_ucp.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/freeze.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/overflow.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/pcount.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/str.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/overflow.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/pbackfail.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekoff.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekpos.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/setbuf.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/underflow.pass.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.verify.cpp2
-rw-r--r--libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/types.pass.cpp2
-rw-r--r--libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/current_zone.pass.cpp77
-rw-r--r--libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/locate_zone.pass.cpp62
-rw-r--r--libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/current_zone.pass.cpp79
-rw-r--r--libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp64
-rwxr-xr-xlibcxx/utils/ci/oss-fuzz.sh2
67 files changed, 565 insertions, 54 deletions
diff --git a/libcxx/docs/ReleaseNotes/19.rst b/libcxx/docs/ReleaseNotes/19.rst
index dd39c1b..2da9df5 100644
--- a/libcxx/docs/ReleaseNotes/19.rst
+++ b/libcxx/docs/ReleaseNotes/19.rst
@@ -42,6 +42,7 @@ Implemented Papers
- P2652R2 - Disallow User Specialization of ``allocator_traits``
- P2819R2 - Add ``tuple`` protocol to ``complex``
- P2495R3 - Interfacing ``stringstream``\s with ``string_view``
+- P2867R2 - Remove Deprecated ``strstream``\s From C++26
- P2302R4 - ``std::ranges::contains``
- P1659R3 - ``std::ranges::starts_with`` and ``std::ranges::ends_with``
@@ -54,6 +55,8 @@ Improvements and New Features
- The ``std::mismatch`` algorithm has been optimized for integral types, which can lead up to 40x performance
improvements.
+- The ``_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM`` macro has been added to make the declarations in ``<strstream>`` available.
+
Deprecations and Removals
-------------------------
diff --git a/libcxx/docs/Status/Cxx2cPapers.csv b/libcxx/docs/Status/Cxx2cPapers.csv
index 6e82086..a34dad5 100644
--- a/libcxx/docs/Status/Cxx2cPapers.csv
+++ b/libcxx/docs/Status/Cxx2cPapers.csv
@@ -47,7 +47,7 @@
"`P1673R13 <https://wg21.link/P1673R13>`__","LWG","A free function linear algebra interface based on the BLAS","Kona November 2023","","",""
"","","","","","",""
"`P2875R4 <https://wg21.link/P2875R4>`__","LWG","Undeprecate ``polymorphic_allocator::destroy`` for C++26","Tokyo March 2024","|Complete|","15.0",""
-"`P2867R2 <https://wg21.link/P2867R2>`__","LWG","Remove Deprecated ``strstreams`` From C++26","Tokyo March 2024","","",""
+"`P2867R2 <https://wg21.link/P2867R2>`__","LWG","Remove Deprecated ``strstreams`` From C++26","Tokyo March 2024","|Complete|","19.0",""
"`P2869R4 <https://wg21.link/P2869R4>`__","LWG","Remove Deprecated ``shared_ptr`` Atomic Access APIs from C++26","Tokyo March 2024","","",""
"`P2872R3 <https://wg21.link/P2872R3>`__","LWG","Remove ``wstring_convert`` From C++26","Tokyo March 2024","","",""
"`P3107R5 <https://wg21.link/P3107R5>`__","LWG","Permit an efficient implementation of ``std::print``","Tokyo March 2024","","","|format| |DR|"
diff --git a/libcxx/docs/UsingLibcxx.rst b/libcxx/docs/UsingLibcxx.rst
index ac12b0b..8a1c747 100644
--- a/libcxx/docs/UsingLibcxx.rst
+++ b/libcxx/docs/UsingLibcxx.rst
@@ -272,7 +272,10 @@ C++26 Specific Configuration Macros
``std::basic_string<...>::reserve()``.
**_LIBCPP_ENABLE_CXX26_REMOVED_ALLOCATOR_MEMBERS**:
- This macro is used to re-enable redundant member of ``allocator<T>::is_always_equal``
+ This macro is used to re-enable redundant member of ``allocator<T>::is_always_equal``.
+
+**_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM**:
+ This macro is used to re-enable all named declarations in ``<strstream>``.
Libc++ Extensions
=================
diff --git a/libcxx/docs/index.rst b/libcxx/docs/index.rst
index db55c6f..743f992 100644
--- a/libcxx/docs/index.rst
+++ b/libcxx/docs/index.rst
@@ -134,7 +134,7 @@ velocity, libc++ drops support for older compilers as newer ones are released.
============ =============== ========================== =====================
Compiler Versions Restrictions Support policy
============ =============== ========================== =====================
-Clang 16, 17, 18-git latest two stable releases per `LLVM's release page <https://releases.llvm.org>`_ and the development version
+Clang 17, 18, 19-git latest two stable releases per `LLVM's release page <https://releases.llvm.org>`_ and the development version
AppleClang 15 latest stable release per `Xcode's release page <https://developer.apple.com/documentation/xcode-release-notes>`_
Open XL 17.1 (AIX) latest stable release per `Open XL's documentation page <https://www.ibm.com/docs/en/openxl-c-and-cpp-aix>`_
GCC 13 In C++11 or later only latest stable release per `GCC's release page <https://gcc.gnu.org/releases.html>`_
diff --git a/libcxx/include/__chrono/tzdb.h b/libcxx/include/__chrono/tzdb.h
index 45c20f2..e0bfedf 100644
--- a/libcxx/include/__chrono/tzdb.h
+++ b/libcxx/include/__chrono/tzdb.h
@@ -16,6 +16,7 @@
// Enable the contents of the header only when libc++ was built with experimental features enabled.
#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB)
+# include <__algorithm/ranges_lower_bound.h>
# include <__chrono/leap_second.h>
# include <__chrono/time_zone.h>
# include <__chrono/time_zone_link.h>
@@ -43,6 +44,40 @@ struct tzdb {
vector<time_zone_link> links;
vector<leap_second> leap_seconds;
+
+ [[nodiscard]] _LIBCPP_HIDE_FROM_ABI const time_zone* __locate_zone(string_view __name) const {
+ if (const time_zone* __result = __find_in_zone(__name))
+ return __result;
+
+ if (auto __it = ranges::lower_bound(links, __name, {}, &time_zone_link::name);
+ __it != links.end() && __it->name() == __name)
+ if (const time_zone* __result = __find_in_zone(__it->target()))
+ return __result;
+
+ return nullptr;
+ }
+
+ _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI const time_zone* locate_zone(string_view __name) const {
+ if (const time_zone* __result = __locate_zone(__name))
+ return __result;
+
+ std::__throw_runtime_error("tzdb: requested time zone not found");
+ }
+
+ _LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI const time_zone* current_zone() const {
+ return __current_zone();
+ }
+
+private:
+ _LIBCPP_HIDE_FROM_ABI const time_zone* __find_in_zone(string_view __name) const noexcept {
+ if (auto __it = ranges::lower_bound(zones, __name, {}, &time_zone::name);
+ __it != zones.end() && __it->name() == __name)
+ return std::addressof(*__it);
+
+ return nullptr;
+ }
+
+ [[nodiscard]] _LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI const time_zone* __current_zone() const;
};
} // namespace chrono
diff --git a/libcxx/include/__chrono/tzdb_list.h b/libcxx/include/__chrono/tzdb_list.h
index e8aaf31..693899d 100644
--- a/libcxx/include/__chrono/tzdb_list.h
+++ b/libcxx/include/__chrono/tzdb_list.h
@@ -17,6 +17,7 @@
#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB)
# include <__availability>
+# include <__chrono/time_zone.h>
# include <__chrono/tzdb.h>
# include <__config>
# include <__fwd/string.h>
@@ -84,6 +85,15 @@ _LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline con
return get_tzdb_list().front();
}
+_LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline const time_zone*
+locate_zone(string_view __name) {
+ return get_tzdb().locate_zone(__name);
+}
+
+_LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline const time_zone* current_zone() {
+ return get_tzdb().current_zone();
+}
+
_LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI const tzdb& reload_tzdb();
_LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI string remote_version();
diff --git a/libcxx/include/chrono b/libcxx/include/chrono
index 4dd4313..8fdc30a 100644
--- a/libcxx/include/chrono
+++ b/libcxx/include/chrono
@@ -689,6 +689,9 @@ struct tzdb {
vector<time_zone> zones;
vector<time_zone_link> links;
vector<leap_second> leap_seconds;
+
+ const time_zone* locate_zone(string_view tz_name) const;
+ const time_zone* current_zone() const;
};
class tzdb_list { // C++20
@@ -714,6 +717,8 @@ public:
// [time.zone.db.access], time zone database access
const tzdb& get_tzdb(); // C++20
tzdb_list& get_tzdb_list(); // C++20
+const time_zone* locate_zone(string_view tz_name); // C++20
+const time_zone* current_zone() // C++20
// [time.zone.db.remote], remote time zone database support
const tzdb& reload_tzdb(); // C++20
diff --git a/libcxx/include/strstream b/libcxx/include/strstream
index e9f5336..c8df6eb 100644
--- a/libcxx/include/strstream
+++ b/libcxx/include/strstream
@@ -13,7 +13,7 @@
/*
strstream synopsis
-class strstreambuf
+class strstreambuf // Removed in C++26
: public basic_streambuf<char>
{
public:
@@ -63,7 +63,7 @@ private:
void (*pfree)(void*); // exposition only
};
-class istrstream
+class istrstream // Removed in C++26
: public basic_istream<char>
{
public:
@@ -81,7 +81,7 @@ private:
strstreambuf sb; // exposition only
};
-class ostrstream
+class ostrstream // Removed in C++26
: public basic_ostream<char>
{
public:
@@ -99,7 +99,7 @@ private:
strstreambuf sb; // exposition only
};
-class strstream
+class strstream // Removed in C++26
: public basic_iostream<char>
{
public:
@@ -138,6 +138,8 @@ private:
# pragma GCC system_header
#endif
+#if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM) || defined(_LIBCPP_BUILDING_LIBRARY)
+
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
@@ -344,4 +346,6 @@ _LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
+#endif // _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM) || defined(_LIBCPP_BUILDING_LIBRARY)
+
#endif // _LIBCPP_STRSTREAM
diff --git a/libcxx/modules/std/chrono.inc b/libcxx/modules/std/chrono.inc
index 2c0bd3f..e142280 100644
--- a/libcxx/modules/std/chrono.inc
+++ b/libcxx/modules/std/chrono.inc
@@ -199,10 +199,10 @@ export namespace std {
using std::chrono::tzdb_list;
// [time.zone.db.access], time zone database access
- // using std::chrono::current_zone;
+ using std::chrono::current_zone;
using std::chrono::get_tzdb;
using std::chrono::get_tzdb_list;
- // using std::chrono::locate_zone;
+ using std::chrono::locate_zone;
// [time.zone.db.remote], remote time zone database support
using std::chrono::reload_tzdb;
diff --git a/libcxx/modules/std/strstream.inc b/libcxx/modules/std/strstream.inc
index a33c514..8087967 100644
--- a/libcxx/modules/std/strstream.inc
+++ b/libcxx/modules/std/strstream.inc
@@ -9,9 +9,11 @@
export namespace std {
#ifndef _LIBCPP_HAS_NO_LOCALIZATION
+# if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM)
using std::istrstream;
using std::ostrstream;
using std::strstream;
using std::strstreambuf;
+# endif // _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM)
#endif // _LIBCPP_HAS_NO_LOCALIZATION
} // namespace std
diff --git a/libcxx/src/tzdb.cpp b/libcxx/src/tzdb.cpp
index 7ba5ceb..2c82a4a 100644
--- a/libcxx/src/tzdb.cpp
+++ b/libcxx/src/tzdb.cpp
@@ -675,6 +675,57 @@ void __init_tzdb(tzdb& __tzdb, __tz::__rules_storage_type& __rules) {
std::ranges::sort(__tzdb.leap_seconds);
}
+#ifdef _WIN32
+[[nodiscard]] static const time_zone* __current_zone_windows(const tzdb& tzdb) {
+ // TODO TZDB Implement this on Windows.
+ std::__throw_runtime_error("unknown time zone");
+}
+#else // ifdef _WIN32
+[[nodiscard]] static const time_zone* __current_zone_posix(const tzdb& tzdb) {
+ // On POSIX systems there are several ways to configure the time zone.
+ // In order of priority they are:
+ // - TZ environment variable
+ // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08
+ // The documentation is unclear whether or not it's allowed to
+ // change time zone information. For example the TZ string
+ // MST7MDT
+ // this is an entry in tzdata.zi. The value
+ // MST
+ // is also an entry. Is it allowed to use the following?
+ // MST-3
+ // Even when this is valid there is no time_zone record in the
+ // database. Since the library would need to return a valid pointer,
+ // this means the library needs to allocate and leak a pointer.
+ //
+ // - The time zone name is the target of the symlink /etc/localtime
+ // relative to /usr/share/zoneinfo/
+
+ // The algorithm is like this:
+ // - If the environment variable TZ is set and points to a valid
+ // record use this value.
+ // - Else use the name based on the `/etc/localtime` symlink.
+
+ if (const char* __tz = getenv("TZ"))
+ if (const time_zone* __result = tzdb.__locate_zone(__tz))
+ return __result;
+
+ filesystem::path __path = "/etc/localtime";
+ if (!std::filesystem::exists(__path))
+ std::__throw_runtime_error("tzdb: the symlink '/etc/localtime' does not exist");
+
+ if (!std::filesystem::is_symlink(__path))
+ std::__throw_runtime_error("tzdb: the path '/etc/localtime' is not a symlink");
+
+ filesystem::path __tz = filesystem::read_symlink(__path);
+ string __name = filesystem::relative(__tz, "/usr/share/zoneinfo/");
+
+ if (const time_zone* __result = tzdb.__locate_zone(__name))
+ return __result;
+
+ std::__throw_runtime_error(("tzdb: the time zone '" + __name + "' is not found in the database").c_str());
+}
+#endif // ifdef _WIN32
+
//===----------------------------------------------------------------------===//
// Public API
//===----------------------------------------------------------------------===//
@@ -684,6 +735,14 @@ _LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI tzdb_l
return __result;
}
+[[nodiscard]] _LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI const time_zone* tzdb::__current_zone() const {
+#ifdef _WIN32
+ return chrono::__current_zone_windows(*this);
+#else
+ return chrono::__current_zone_posix(*this);
+#endif
+}
+
_LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI const tzdb& reload_tzdb() {
if (chrono::remote_version() == chrono::get_tzdb().version)
return chrono::get_tzdb();
diff --git a/libcxx/test/libcxx/atomics/diagnose_invalid_memory_order.verify.cpp b/libcxx/test/libcxx/atomics/diagnose_invalid_memory_order.verify.cpp
index defd43c..2790916 100644
--- a/libcxx/test/libcxx/atomics/diagnose_invalid_memory_order.verify.cpp
+++ b/libcxx/test/libcxx/atomics/diagnose_invalid_memory_order.verify.cpp
@@ -9,7 +9,7 @@
// This test fails with Clang <18 because diagnose_if doesn't emit all of the
// diagnostics when -fdelayed-template-parsing is enabled, like it is in MSVC
// mode.
-// XFAIL: msvc && (clang-16 || clang-17)
+// XFAIL: msvc && clang-17
// REQUIRES: diagnose-if-support
diff --git a/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.compile.pass.cpp b/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.compile.pass.cpp
index c868832..9acb57f 100644
--- a/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.compile.pass.cpp
+++ b/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.compile.pass.cpp
@@ -38,9 +38,17 @@ void test() {
std::chrono::get_tzdb_list();
std::chrono::get_tzdb();
+ std::chrono::locate_zone("name");
+ std::chrono::current_zone();
std::chrono::remote_version();
{
+ const std::chrono::tzdb& t = list.front();
+ t.locate_zone("name");
+ t.current_zone();
+ }
+
+ {
tz.name();
operator==(tz, tz);
operator<=>(tz, tz);
diff --git a/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.verify.cpp b/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.verify.cpp
index 4d26b46..8795a4e 100644
--- a/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.verify.cpp
+++ b/libcxx/test/libcxx/diagnostics/chrono.nodiscard_extensions.verify.cpp
@@ -33,9 +33,17 @@ void test() {
list.cbegin(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
list.cend(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ {
+ const std::chrono::tzdb& t = list.front();
+ t.locate_zone("name"); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ t.current_zone(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ }
+
namespace crno = std::chrono;
crno::get_tzdb_list(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
crno::get_tzdb(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ crno::locate_zone("n"); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ crno::current_zone(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
crno::remote_version(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
{
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.lazy.split/no_unique_address.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.lazy.split/no_unique_address.compile.pass.cpp
index b411ce1..a0bfb7c 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.lazy.split/no_unique_address.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.lazy.split/no_unique_address.compile.pass.cpp
@@ -7,7 +7,7 @@
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
-// XFAIL: msvc && (clang-16 || clang-17)
+// XFAIL: msvc && clang-17
// class lazy_split_view {
// _LIBCPP_NO_UNIQUE_ADDRESS _View __base_ = _View();
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.split/no_unique_address.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.split/no_unique_address.compile.pass.cpp
index 0d8bfbc..694cf1fd 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.split/no_unique_address.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.split/no_unique_address.compile.pass.cpp
@@ -7,7 +7,7 @@
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
-// XFAIL: msvc && (clang-16 || clang-17)
+// XFAIL: msvc && clang-17
// class split_view {
// _LIBCPP_NO_UNIQUE_ADDRESS _View __base_ = _View();
diff --git a/libcxx/test/libcxx/ranges/range.factories/range.istream.view/no_unique_address.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.factories/range.istream.view/no_unique_address.compile.pass.cpp
index 8359d26..a77c4e4 100644
--- a/libcxx/test/libcxx/ranges/range.factories/range.istream.view/no_unique_address.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.factories/range.istream.view/no_unique_address.compile.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: no-localization
// UNSUPPORTED: c++03, c++11, c++14, c++17
-// XFAIL: msvc && (clang-16 || clang-17)
+// XFAIL: msvc && clang-17
// Test the libc++ extension that the value stored in `std::ranges::istream_view` has been marked
// as _LIBCPP_NO_UNIQUE_ADDRESS
diff --git a/libcxx/test/libcxx/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp b/libcxx/test/libcxx/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp
new file mode 100644
index 0000000..971f7f0
--- /dev/null
+++ b/libcxx/test/libcxx/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp
@@ -0,0 +1,84 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-incomplete-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// struct tzdb
+
+// const time_zone* locate_zone(string_view tz_name) const;
+
+#include <cassert>
+#include <chrono>
+#include <fstream>
+#include <string_view>
+
+#include "test_macros.h"
+#include "assert_macros.h"
+#include "concat_macros.h"
+#include "filesystem_test_helper.h"
+#include "test_tzdb.h"
+
+scoped_test_env env;
+[[maybe_unused]] const std::filesystem::path dir = env.create_dir("zoneinfo");
+const std::filesystem::path file = env.create_file("zoneinfo/tzdata.zi");
+
+std::string_view std::chrono::__libcpp_tzdb_directory() {
+ static std::string result = dir.string();
+ return result;
+}
+
+void write(std::string_view input) {
+ static int version = 0;
+
+ std::ofstream f{file};
+ f << "# version " << version++ << '\n';
+ f.write(input.data(), input.size());
+}
+
+static const std::chrono::tzdb& parse(std::string_view input) {
+ write(input);
+ return std::chrono::reload_tzdb();
+}
+
+int main(int, const char**) {
+ const std::chrono::tzdb& tzdb = parse(
+ R"(
+Z zone 0 r f
+L zone link
+L link link_to_link
+)");
+
+ {
+ const std::chrono::time_zone* tz = tzdb.locate_zone("zone");
+ assert(tz);
+ assert(tz->name() == "zone");
+ }
+ {
+ const std::chrono::time_zone* tz = tzdb.locate_zone("link");
+ assert(tz);
+ assert(tz->name() == "zone");
+ }
+
+ TEST_VALIDATE_EXCEPTION(
+ std::runtime_error,
+ [&]([[maybe_unused]] const std::runtime_error& e) {
+ std::string_view what{"tzdb: requested time zone not found"};
+ TEST_LIBCPP_REQUIRE(
+ e.what() == what,
+ TEST_WRITE_CONCATENATED("\nExpected exception ", what, "\nActual exception ", e.what(), '\n'));
+ },
+ TEST_IGNORE_NODISCARD tzdb.locate_zone("link_to_link"));
+
+ return 0;
+}
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp.pass.cpp
index b5ee0bf..701e6df 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp_size.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp_size.pass.cpp
index 4d0d673..fd2ad66 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp_size.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/ccp_size.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp.pass.cpp
index 5898094..c5fe349 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp_size.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp_size.pass.cpp
index e13e20e..7d9c7d6 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp_size.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.cons/cp_size.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/rdbuf.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/rdbuf.pass.cpp
index 449114a..f5ef29b 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/rdbuf.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/rdbuf.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/str.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/str.pass.cpp
index e7c0637..63d3800 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/str.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.istrstream.members/str.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.verify.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.verify.cpp
index 2ab252e..d02f12d 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.verify.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/depr.verify.cpp
@@ -6,6 +6,8 @@
//
//===----------------------------------------------------------------------===//
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
+
// <strstream>
// check that istrstream is marked deprecated
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/types.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/types.pass.cpp
index be1a9e1..526c4dc 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/types.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.istrstream/types.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/cp_size_mode.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/cp_size_mode.pass.cpp
index 8698983..b9db1bf 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/cp_size_mode.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/cp_size_mode.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/default.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/default.pass.cpp
index abbf6af..b67f0ab 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/default.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.cons/default.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/freeze.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/freeze.pass.cpp
index 854e68b..e087c06 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/freeze.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/freeze.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/pcount.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/pcount.pass.cpp
index 9830aeb..73f2033 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/pcount.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/pcount.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/rdbuf.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/rdbuf.pass.cpp
index f9a859d..d8b55d9 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/rdbuf.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/rdbuf.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/str.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/str.pass.cpp
index 72f665a..2867031 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/str.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.ostrstream.members/str.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.verify.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.verify.cpp
index e0c805f..9ec4650 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.verify.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/depr.verify.cpp
@@ -6,6 +6,8 @@
//
//===----------------------------------------------------------------------===//
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
+
// <strstream>
// check that ostrstream is marked deprecated
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/types.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/types.pass.cpp
index 6a71c44..e321444 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/types.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.ostrstream/types.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/cp_size_mode.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/cp_size_mode.pass.cpp
index a85e132..54e09d3 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/cp_size_mode.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/cp_size_mode.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/default.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/default.pass.cpp
index 390162e..1e4c120 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/default.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.cons/default.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.dest/rdbuf.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.dest/rdbuf.pass.cpp
index 3fe277a..99d58cc 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.dest/rdbuf.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.dest/rdbuf.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/freeze.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/freeze.pass.cpp
index 263fdde..6cc26bb 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/freeze.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/freeze.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/pcount.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/pcount.pass.cpp
index b053cf1..efe2c32 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/pcount.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/pcount.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/str.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/str.pass.cpp
index 3d251d9..e1bc40c 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/str.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.strstream.oper/str.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.verify.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.verify.cpp
index 0365522..ab88d6d 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.verify.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/depr.verify.cpp
@@ -6,6 +6,8 @@
//
//===----------------------------------------------------------------------===//
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
+
// <strstream>
// check that strstream is marked deprecated
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/types.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/types.pass.cpp
index fb54384..7609430 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/types.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstream/types.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ccp_size.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ccp_size.pass.cpp
index 8f81707..3d7f2ff 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ccp_size.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ccp_size.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cp_size_cp.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cp_size_cp.pass.cpp
index 25a9617..0c4bf62 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cp_size_cp.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cp_size_cp.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cscp_size.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cscp_size.pass.cpp
index fc3386f..e0928835 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cscp_size.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cscp_size.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cucp_size.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cucp_size.pass.cpp
index a74c504..7f5504d 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cucp_size.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/cucp_size.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/custom_alloc.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/custom_alloc.pass.cpp
index 756427d..0aa7e1a 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/custom_alloc.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/custom_alloc.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/default.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/default.pass.cpp
index 81924c9..803be42 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/default.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/default.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/scp_size_scp.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/scp_size_scp.pass.cpp
index b8991a8..35c1512 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/scp_size_scp.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/scp_size_scp.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ucp_size_ucp.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ucp_size_ucp.pass.cpp
index 1d3463f..e71fa031 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ucp_size_ucp.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/ucp_size_ucp.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/freeze.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/freeze.pass.cpp
index 93eec8d..1276187 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/freeze.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/freeze.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/overflow.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/overflow.pass.cpp
index 5b973cf..fc79e78 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/overflow.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/overflow.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/pcount.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/pcount.pass.cpp
index b64c9dc..b62c339 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/pcount.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/pcount.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/str.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/str.pass.cpp
index d6c8b8e..68be8dd 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/str.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.members/str.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/overflow.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/overflow.pass.cpp
index 37109c7..6a932dc 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/overflow.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/overflow.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/pbackfail.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/pbackfail.pass.cpp
index 698953f..484a726 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/pbackfail.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/pbackfail.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekoff.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekoff.pass.cpp
index d98e6f7..96900d8 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekoff.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekoff.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekpos.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekpos.pass.cpp
index be88f5a..f3193d3 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekpos.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekpos.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/setbuf.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/setbuf.pass.cpp
index ce7612b..44e6704 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/setbuf.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/setbuf.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/underflow.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/underflow.pass.cpp
index 4fc79b5..be916be 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/underflow.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/underflow.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.verify.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.verify.cpp
index a598acb..471b287 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.verify.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.verify.cpp
@@ -6,6 +6,8 @@
//
//===----------------------------------------------------------------------===//
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
+
// <strstream>
// check that strstreambuf is marked deprecated
diff --git a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/types.pass.cpp b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/types.pass.cpp
index bc312cb..aee1260 100644
--- a/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/types.pass.cpp
+++ b/libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/types.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
// <strstream>
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/current_zone.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/current_zone.pass.cpp
new file mode 100644
index 0000000..d85c8ba
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/current_zone.pass.cpp
@@ -0,0 +1,77 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-incomplete-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// const time_zone* current_zone();
+
+#include <cassert>
+#include <chrono>
+#include <string_view>
+#include <stdlib.h>
+
+#include "test_macros.h"
+#include "assert_macros.h"
+#include "concat_macros.h"
+
+#ifdef _WIN32
+static void set_tz(std::string zone) {
+ // Note Windows does not have setenv, only putenv
+ // https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/putenv-s-wputenv-s?view=msvc-170
+ // Unlike POSIX it does not mention the string of putenv becomes part
+ // of the environment.
+
+ int status = _putenv_s("TZ", zone.c_str(), 1);
+ assert(status == 0);
+}
+
+#else
+static void set_tz(const std::string& zone) {
+ int status = setenv("TZ", zone.c_str(), 1);
+ assert(status == 0);
+}
+#endif
+
+static void test_zone(const std::string& zone) {
+ set_tz(zone);
+ const std::chrono::time_zone* tz = std::chrono::current_zone();
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+static void test_link(const std::string& link, std::string_view zone) {
+ set_tz(link);
+ const std::chrono::time_zone* tz = std::chrono::current_zone();
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+int main(int, const char**) {
+ const std::chrono::time_zone* tz = std::chrono::current_zone();
+ // Returns a valid time zone, the value depends on the OS settings.
+ assert(tz);
+ // setting the environment to an invalid value returns the value of
+ // the OS setting.
+ set_tz("This is not a time zone");
+ assert(tz == std::chrono::current_zone());
+
+ const std::chrono::tzdb& db = std::chrono::get_tzdb();
+ for (const auto& zone : db.zones)
+ test_zone(std::string{zone.name()});
+
+ for (const auto& link : db.links)
+ test_link(std::string{link.name()}, link.target());
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/locate_zone.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/locate_zone.pass.cpp
new file mode 100644
index 0000000..c3142a8
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/locate_zone.pass.cpp
@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-incomplete-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// const time_zone* locate_zone(string_view tz_name);
+
+#include <cassert>
+#include <chrono>
+#include <string_view>
+
+#include "test_macros.h"
+#include "assert_macros.h"
+#include "concat_macros.h"
+
+static void test_zone(std::string_view zone) {
+ const std::chrono::time_zone* tz = std::chrono::locate_zone(zone);
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+static void test_link(std::string_view link, std::string_view zone) {
+ const std::chrono::time_zone* tz = std::chrono::locate_zone(link);
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+static void test_exception([[maybe_unused]] std::string_view zone) {
+ TEST_VALIDATE_EXCEPTION(
+ std::runtime_error,
+ [&]([[maybe_unused]] const std::runtime_error& e) {
+ std::string_view what{"tzdb: requested time zone not found"};
+ TEST_LIBCPP_REQUIRE(
+ e.what() == what,
+ TEST_WRITE_CONCATENATED("\nExpected exception ", what, "\nActual exception ", e.what(), '\n'));
+ },
+ TEST_IGNORE_NODISCARD std::chrono::locate_zone(zone));
+}
+
+int main(int, const char**) {
+ const std::chrono::tzdb& db = std::chrono::get_tzdb();
+ for (const auto& zone : db.zones)
+ test_zone(zone.name());
+
+ for (const auto& link : db.links)
+ test_link(link.name(), link.target());
+
+ test_exception("This is not a time zone");
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/current_zone.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/current_zone.pass.cpp
new file mode 100644
index 0000000..7b4218c
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/current_zone.pass.cpp
@@ -0,0 +1,79 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-incomplete-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// struct tzdb
+
+// const time_zone* current_zone() const;
+
+#include <cassert>
+#include <chrono>
+#include <string_view>
+#include <stdlib.h>
+
+#include "test_macros.h"
+#include "assert_macros.h"
+#include "concat_macros.h"
+
+#ifdef _WIN32
+static void set_tz(std::string zone) {
+ // Note Windows does not have setenv, only putenv
+ // https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/putenv-s-wputenv-s?view=msvc-170
+ // Unlike POSIX it does not mention the string of putenv becomes part
+ // of the environment.
+
+ int status = _putenv_s("TZ", zone.c_str(), 1);
+ assert(status == 0);
+}
+
+#else
+static void set_tz(const std::string& zone) {
+ int status = setenv("TZ", zone.c_str(), 1);
+ assert(status == 0);
+}
+#endif
+
+static void test_zone(const std::string& zone) {
+ set_tz(zone);
+ const std::chrono::time_zone* tz = std::chrono::get_tzdb().current_zone();
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+static void test_link(const std::string& link, std::string_view zone) {
+ set_tz(link);
+ const std::chrono::time_zone* tz = std::chrono::get_tzdb().current_zone();
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+int main(int, const char**) {
+ const std::chrono::time_zone* tz = std::chrono::get_tzdb().current_zone();
+ // Returns a valid time zone, the value depends on the OS settings.
+ assert(tz);
+ // setting the environment to an invalid value returns the value of
+ // the OS setting.
+ set_tz("This is not a time zone");
+ assert(tz == std::chrono::get_tzdb().current_zone());
+
+ const std::chrono::tzdb& db = std::chrono::get_tzdb();
+ for (const auto& zone : db.zones)
+ test_zone(std::string{zone.name()});
+
+ for (const auto& link : db.links)
+ test_link(std::string{link.name()}, link.target());
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp
new file mode 100644
index 0000000..12987f6
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.tzdb/locate_zone.pass.cpp
@@ -0,0 +1,64 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-incomplete-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// struct tzdb
+
+// const time_zone* locate_zone(string_view tz_name) const;
+
+#include <cassert>
+#include <chrono>
+#include <string_view>
+
+#include "test_macros.h"
+#include "assert_macros.h"
+#include "concat_macros.h"
+
+static void test_zone(std::string_view zone) {
+ const std::chrono::time_zone* tz = std::chrono::get_tzdb().locate_zone(zone);
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+static void test_link(std::string_view link, std::string_view zone) {
+ const std::chrono::time_zone* tz = std::chrono::get_tzdb().locate_zone(link);
+ assert(tz);
+ assert(tz->name() == zone);
+}
+
+static void test_exception([[maybe_unused]] std::string_view zone) {
+ TEST_VALIDATE_EXCEPTION(
+ std::runtime_error,
+ [&]([[maybe_unused]] const std::runtime_error& e) {
+ std::string_view what{"tzdb: requested time zone not found"};
+ TEST_LIBCPP_REQUIRE(
+ e.what() == what,
+ TEST_WRITE_CONCATENATED("\nExpected exception ", what, "\nActual exception ", e.what(), '\n'));
+ },
+ TEST_IGNORE_NODISCARD std::chrono::get_tzdb().locate_zone(zone));
+}
+
+int main(int, const char**) {
+ const std::chrono::tzdb& db = std::chrono::get_tzdb();
+ for (const auto& zone : db.zones)
+ test_zone(zone.name());
+
+ for (const auto& link : db.links)
+ test_link(link.name(), link.target());
+
+ test_exception("This is not a time zone");
+
+ return 0;
+}
diff --git a/libcxx/utils/ci/oss-fuzz.sh b/libcxx/utils/ci/oss-fuzz.sh
index e572340..03b59b2 100755
--- a/libcxx/utils/ci/oss-fuzz.sh
+++ b/libcxx/utils/ci/oss-fuzz.sh
@@ -23,7 +23,7 @@ for test in libcxx/test/libcxx/fuzzing/*.pass.cpp; do
exe="$(basename ${test})"
exe="${exe%.pass.cpp}"
${CXX} ${CXXFLAGS} \
- -std=c++14 \
+ -std=c++20 \
-DLIBCPP_OSS_FUZZ \
-D_LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS \
-nostdinc++ -cxx-isystem ${INSTALL}/include/c++/v1 \