new: add rewrites for c++17

Author: facchinm

cores/arduino/new

@@ -8,6 +8,7 @@
 #define NEW_H
 
 #include <stdlib.h>
+//#pragma long_calls
 
 namespace std {
   struct nothrow_t {};
@@ -27,25 +28,36 @@ namespace std {
   using size_t = ::size_t;
 } // namespace std
 
-[[gnu::weak]] void * operator new(std::size_t size);
-[[gnu::weak]] void * operator new[](std::size_t size);
+void * operator new(std::size_t size);
+void * operator new[](std::size_t size);
 
-[[gnu::weak]] void * operator new(std::size_t size, const std::nothrow_t tag) noexcept;
-[[gnu::weak]] void * operator new[](std::size_t size, const std::nothrow_t& tag) noexcept;
+#if __cplusplus >= 201703L
+void * operator new(std::size_t count, std::align_val_t al);
+void * operator new[](std::size_t count, std::align_val_t al);
+
+void* operator new(std::size_t count, std::align_val_t al,
+                      const std::nothrow_t& tag) noexcept;
+void* operator new[](std::size_t count, std::align_val_t al,
+                      const std::nothrow_t& tag) noexcept;
+#endif
+
+void * operator new(std::size_t size, const std::nothrow_t tag) noexcept;
+void * operator new[](std::size_t size, const std::nothrow_t& tag) noexcept;
 
 void * operator new(std::size_t size, void *place) noexcept;
 void * operator new[](std::size_t size, void *place) noexcept;
 
-[[gnu::weak]] void operator delete(void * ptr) noexcept;
-[[gnu::weak]] void operator delete[](void * ptr) noexcept;
+
+void operator delete(void * ptr) noexcept;
+void operator delete[](void * ptr) noexcept;
 
 #if __cplusplus >= 201402L
-[[gnu::weak]] void operator delete(void* ptr, std::size_t size) noexcept;
-[[gnu::weak]] void operator delete[](void * ptr, std::size_t size) noexcept;
+void operator delete(void* ptr, std::size_t size) noexcept;
+void operator delete[](void * ptr, std::size_t size) noexcept;
 #endif // __cplusplus >= 201402L
 
-[[gnu::weak]] void operator delete(void* ptr, const std::nothrow_t& tag) noexcept;
-[[gnu::weak]] void operator delete[](void* ptr, const std::nothrow_t& tag) noexcept;
+void operator delete(void* ptr, const std::nothrow_t& tag) noexcept;
+void operator delete[](void* ptr, const std::nothrow_t& tag) noexcept;
 
 void operator delete(void* ptr, void* place) noexcept;
 void operator delete[](void* ptr, void* place) noexcept;

cores/arduino/new.cpp

@@ -44,6 +44,36 @@ void * operator new[](std::size_t size) {
   return operator new(size);
 }
 
+#if __cplusplus >= 201703L
+void* operator new(std::size_t count, std::align_val_t al) {
+  return operator new(count);
+}
+
+void* operator new[](std::size_t count, std::align_val_t al) {
+  return operator new(count);
+}
+
+void * operator new(std::size_t size, std::align_val_t al, const std::nothrow_t tag) noexcept {
+#if defined(NEW_TERMINATES_ON_FAILURE)
+  // Cannot call throwing operator new as standard suggests, so call
+  // new_helper directly then
+  return new_helper(size);
+#else
+  return operator new(size);
+#endif
+}
+
+void * operator new[](std::size_t size, std::align_val_t al, const std::nothrow_t& tag) noexcept {
+#if defined(NEW_TERMINATES_ON_FAILURE)
+  // Cannot call throwing operator new[] as standard suggests, so call
+  // malloc directly then
+  return new_helper(size);
+#else
+  return operator new[](size);
+#endif
+}
+#endif
+
 void * operator new(std::size_t size, const std::nothrow_t tag) noexcept {
 #if defined(NEW_TERMINATES_ON_FAILURE)
   // Cannot call throwing operator new as standard suggests, so call
@@ -102,4 +132,4 @@ void operator delete(void* ptr, void* place) noexcept {
 void operator delete[](void* ptr, void* place) noexcept {
   (void)ptr; (void)place; // unused
   // Nothing to do
-}
+}