NuttX platform remove system (toolchain) stdc++ include path

platforms/nuttx/CMakeLists.txt

@@ -83,6 +83,7 @@ target_link_libraries(nuttx_cxx INTERFACE nuttx_c)
 
 target_link_libraries(px4 PRIVATE
 
+	-nostartfiles
 	-nodefaultlibs
 	-nostdlib
 
@@ -99,6 +100,7 @@ target_link_libraries(px4 PRIVATE
 	-Wl,--end-group
 
 	m
+	gcc
 	)
 
 target_link_libraries(px4 PRIVATE ${module_libraries})

platforms/nuttx/NuttX/Make.defs.in

@@ -108,6 +108,7 @@ CFLAGS = $(ARCHINCLUDES) \
 
 CXXFLAGS = $(ARCHXXINCLUDES) \
 	-std=gnu++11 \
+	-nostdinc++ \
 	${CMAKE_CXX_FLAGS} \
 	$(FLAGS) \
 	-fcheck-new \