--- a/common/almalloc.cpp.ORIG	2020-11-04 11:00:35.000000000 +0100
+++ b/common/almalloc.cpp	2021-01-19 17:19:18.980519245 +0100
@@ -20,7 +20,7 @@
 
 #if defined(HAVE_STD_ALIGNED_ALLOC)
     size = (size+(alignment-1))&~(alignment-1);
-    return std::aligned_alloc(alignment, size);
+    return ::aligned_alloc(alignment, size);
 #elif defined(HAVE_POSIX_MEMALIGN)
     void *ret{};
     if(posix_memalign(&ret, alignment, size) == 0)
--- a/CMakeLists.txt.ORIG	2021-01-19 17:13:01.837540027 +0100
+++ b/CMakeLists.txt	2021-01-19 17:19:03.291520110 +0100
@@ -475,7 +475,7 @@
 check_cxx_source_compiles("#include <cstdlib>
 int main()
 {
-    void *ptr{std::aligned_alloc(alignof(int), sizeof(int))};
+    void *ptr{::aligned_alloc(alignof(int), sizeof(int))};
     std::free(ptr);
     return 0;
 }" HAVE_STD_ALIGNED_ALLOC)