[PATCH] libstdc++: Suppress deprecation messages from <tbb/task.h> [PR101228]

[Jonathan Wakely]

Should we do this to silence the deprecation messages from the TBB
headers we include?

-- >8 --

libstdc++-v3/ChangeLog:

	PR libstdc++/101228
	* include/pstl/parallel_backend_tbb.h (TBB_SUPPRESS_DEPRECATED_MESSAGES):
	Define before including <tbb/task.h> then undef afterwards.
---
 libstdc++-v3/include/pstl/parallel_backend_tbb.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libstdc++-v3/include/pstl/parallel_backend_tbb.h b/libstdc++-v3/include/pstl/parallel_backend_tbb.h
index 3ff55237bff..96e4b709fbe 100644
--- a/libstdc++-v3/include/pstl/parallel_backend_tbb.h
+++ b/libstdc++-v3/include/pstl/parallel_backend_tbb.h
@@ -15,6 +15,11 @@
 
 #include "parallel_backend_utils.h"
 
+#ifndef TBB_SUPPRESS_DEPRECATED_MESSAGES
+# define TBB_SUPPRESS_DEPRECATED_MESSAGES 1
+# define _GLIBCXX_UNDEF_SUPPRESS
+#endif
+
 // Bring in minimal required subset of Intel TBB
 #include <tbb/blocked_range.h>
 #include <tbb/parallel_for.h>
@@ -25,6 +30,11 @@
 #include <tbb/tbb_allocator.h>
 #include <tbb/task.h>
 
+#ifdef _GLIBCXX_UNDEF_SUPPRESS
+# undef TBB_SUPPRESS_DEPRECATED_MESSAGES
+# undef _GLIBCXX_UNDEF_SUPPRESS
+#endif
+
 #if TBB_INTERFACE_VERSION < 10000
 #    error Intel(R) Threading Building Blocks 2018 is required; older versions are not supported.
 #endif
-- 
2.44.0