From c4411b2305e15216146c84e81de6ed7eb3950816 Mon Sep 17 00:00:00 2001
From: Marcin Wojdyr <wojdyr@gmail.com>
Date: Thu, 26 Aug 2021 02:27:33 +0200
Subject: [PATCH] pocketfft_hdronly.h: one more condition for aligned_alloc

---
 include/gemmi/third_party/pocketfft_hdronly.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/gemmi/third_party/pocketfft_hdronly.h b/include/gemmi/third_party/pocketfft_hdronly.h
index 54ae9fec0..279ad26f4 100644
--- a/include/gemmi/third_party/pocketfft_hdronly.h
+++ b/include/gemmi/third_party/pocketfft_hdronly.h
@@ -156,8 +156,10 @@ template<typename T> class arr
       }
     static void dealloc(T *ptr)
       { free(ptr); }
+  // aligned_alloc is missing in many C++17 compilers
 #elif __cplusplus >= 201703L && !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) && \
   !defined(__APPLE__) && \
+  (!defined(__GLIBC_MINOR__) || __GLIBC__-0 != 2 || __GLIBC_MINOR__ >= 16) && \
   (!defined(__MINGW32__) || defined(_GLIBCXX_HAVE_ALIGNED_ALLOC))
     static T *ralloc(size_t num)
       {