alloc: fix macos c++14

Author: fabinsch

include/proxsuite/linalg/veg/memory/alloc.hpp

@@ -28,7 +28,8 @@ namespace veg {
 namespace alignment {
 
 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 101500 &&                                 \
-  (defined(_LIBCPP_HAS_ALIGNED_ALLOC) || defined(_LIBCPP_HAS_C11_FEATURES))
+  (defined(_LIBCPP_HAS_ALIGNED_ALLOC) || defined(_LIBCPP_HAS_C11_FEATURES)) && \
+  defined(PROXSUITE_WITH_CPP_17)
 VEG_INLINE void*
 aligned_alloc(std::size_t alignment, std::size_t size)
 {
@@ -167,11 +168,15 @@ aligned_alloc(usize align, usize size) noexcept -> void*
 #if defined(_WIN32)
   return _aligned_malloc((size + mask) & ~mask, align);
 #elif defined(__APPLE__)
+#if defined(PROXSUITE_WITH_CPP_17)
   return alignment::aligned_alloc(align, (size + mask) & ~mask);
+#elif defined(PROXSUITE_WITH_CPP_14)
+  return alignment::detail::aligned_alloc(align, (size + mask) & ~mask);
+#endif
 #else
 #ifdef PROXSUITE_WITH_CPP_17
   return std::aligned_alloc(align, (size + mask) & ~mask);
-#else
+#elif defined(PROXSUITE_WITH_CPP_14)
   return alignment::detail::aligned_alloc(align, (size + mask) & ~mask);
 #endif
 #endif