Index: rts/lib/xsimd/memory/xsimd_aligned_allocator.hpp
--- rts/lib/xsimd/memory/xsimd_aligned_allocator.hpp.orig
+++ rts/lib/xsimd/memory/xsimd_aligned_allocator.hpp
@@ -19,7 +19,7 @@
 #include "../config/xsimd_align.hpp"
 
 #if defined(XSIMD_ALLOCA)
-#if defined(__GNUC__)
+#if defined(__GNUC__) && !defined(__OpenBSD__)
 #include <alloca.h>
 #elif defined(_MSC_VER)
 #include <malloc.h>
