2025-04-17  Thomas Schwinge  <tschwinge@baylibre.com>

	Backported from trunk:
	2025-04-07  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/119645
	* acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY) [GCN, nvptx]:
	Hard-code results.
	* configure: Regenerate.
	* configure.host [GCN, nvptx] (atomicity_dir): Set to
	'cpu/generic/atomicity_builtins'.

	Backported from trunk:
	2025-04-03  Thomas Schwinge  <tschwinge@baylibre.com>

	* config/cpu/nvptx/t-nvptx: Remove.
	* configure.host [nvptx]: Adjust.

	Backported from trunk:
	2025-04-03  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/119573
	* config/cpu/nvptx/t-nvptx (AM_MAKEFLAGS): Don't amend.

2025-04-02  Thomas Schwinge  <tschwinge@baylibre.com>

	Backported from trunk:
	2025-04-01  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/119369
	* config/cpu/gcn/cpu_defines.h: New.
	* configure.host [GCN] (cpu_defines_dir): Point to it.

2025-03-19  Thomas Schwinge  <tschwinge@baylibre.com>

	Backported from trunk:
	2025-03-14  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/92713
	PR target/101544
	* config/cpu/nvptx/cpu_defines.h: New.
	* config/cpu/nvptx/t-nvptx: Likewise.
	* configure.host: Handle GCN, nvptx.

	Backported from trunk:
	2025-03-13  Thomas Schwinge  <tschwinge@baylibre.com>

	* acinclude.m4 (GLIBCXX_ENABLE_CXX_FLAGS): Append to
	'EXTRA_CXX_FLAGS' any additional flags.
	* configure: Regenerate.
	* configure.host: Document 'EXTRA_CFLAGS', 'EXTRA_CXX_FLAGS'.

	Backported from trunk:
	2025-03-06  Jonathan Wakely  <jwakely@redhat.com>
		    Thomas Schwinge  <tschwinge@baylibre.com>

	* src/c++20/tzdb.cc [__GTHREADS && !__GTHREADS_CXX0X]: Use
	'__gnu_cxx::__mutex'.

	Backported from trunk:
	2025-03-06  Thomas Schwinge  <tschwinge@baylibre.com>

	* src/c++17/fs_dir.cc (do_unlink): Tag 'is_directory' as
	'[[maybe_unused]]'.

	Backported from trunk:
	2025-03-06  Thomas Schwinge  <tschwinge@baylibre.com>

	* src/filesystem/dir-common.h (openat): Tag 'nofollow' as
	'[[maybe_unused]]'.

	Backported from trunk:
	2025-03-06  Thomas Schwinge  <tschwinge@baylibre.com>
		    Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/c++config [!__cpp_exceptions]
	(_GLIBCXX_THROW_OR_ABORT): Reference '_EXC'.

2025-02-27  Thomas Schwinge  <tschwinge@baylibre.com>

	Backported from trunk:
	2025-02-22  Thomas Schwinge  <tschwinge@baylibre.com>

	* testsuite/lib/prune.exp (proc libstdc++-dg-prune): Turn
	'sorry, unimplemented: dynamic stack allocation not supported' into
	UNSUPPORTED.

2025-02-18  Thomas Schwinge  <tschwinge@baylibre.com>

	Backported from trunk:
	2025-02-08  Thomas Schwinge  <tschwinge@baylibre.com>

	* testsuite/lib/prune.exp (libstdc++-dg-prune): Turn
	'sorry, unimplemented: exception handling not supported' into
	UNSUPPORTED.

	Backported from trunk:
	2025-02-08  Thomas Schwinge  <tschwinge@baylibre.com>

	* testsuite/lib/prune.exp (libstdc++-dg-prune): Clarify
	effective-target 'exceptions_enabled'.