fix compile issue on latest esp-idf v4 - release

components/tools/CMakeLists.txt

@@ -1,4 +1,10 @@
-idf_component_register(SRC_DIRS .  
+idf_component_register(SRCS operator.cpp utf8.c  
 						REQUIRES esp_common  pthread 
                     	INCLUDE_DIRS .
                     	)
+
+#doing our own implementation of new operator for some pre-compiled binaries
+target_link_libraries(${COMPONENT_LIB} INTERFACE "-u _ZdlPv")
+target_link_libraries(${COMPONENT_LIB} INTERFACE "-u _Znwj")
+
+  

components/tools/operator.cpp

@@ -0,0 +1,3 @@
+#include <stdlib.h> // for malloc and free
+void* operator new(unsigned int size) { return malloc(size); }
+void operator delete(void* ptr) { if (ptr) free(ptr); }