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* [committed] libstdc++: Add comment about memalign requirements
@ 2022-03-31 15:22 Jonathan Wakely
  0 siblings, 0 replies; only message in thread
From: Jonathan Wakely @ 2022-03-31 15:22 UTC (permalink / raw)
  To: libstdc++, gcc-patches

Pushed to trunk.

-- >8 --

The memalign man page on Solaris and QNX lists an additional requirement
for the alignment value that is not present in all implementation of
that non-standard function. For both those targets we should actually be
using posix_memalign anyway, so it doesn't matter. This just adds a
comment making note of that fact.


	* libsupc++/ (aligned_alloc): Add comment.
 libstdc++-v3/libsupc++/ | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libstdc++-v3/libsupc++/ b/libstdc++-v3/libsupc++/
index 5f24737de1c..411cd8d98b2 100644
--- a/libstdc++-v3/libsupc++/
+++ b/libstdc++-v3/libsupc++/
@@ -87,6 +87,8 @@ aligned_alloc (std::size_t al, std::size_t sz)
 static inline void*
 aligned_alloc (std::size_t al, std::size_t sz)
+  // Solaris requires al >= sizeof a word and QNX requires >= sizeof(void*)
+  // but they both provide posix_memalign, so will use the definition above.
   return memalign (al, sz);

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