Using C++ standard libraries

[ishgum]

I am using C++ to program the nRF52 DK and I am trying to use the standard vector library.

When I try and compile it I get the linker error: ${GCC_PATH}/arm-none-eabi/include/c++/6.3.1/ext/new_allocator.h:104: undefined reference to `operator new(unsigned int)'

I have been trying to alter the makefile for a couple of hours and haven't had any success in getting the linker to recognise the missing libraries. Is it possible to include the c++ standard libraries?

[Jørgen Holmefjord]

Which compiler are you using, and what flags are you passing to the compiler?

[ishgum]

I am using GCC as my compiler, although my understanding is that it will automatically use the g++ compiler when working with a cpp file? (For reference, I have other .cpp files which are compiling fine, just can't use stdc++).

I tried passing the following:

CPPFLAGS += -I/${GCC_PATH}/arm-none-eabi/include LDFLAGS += -L/${GCC_PATH}/arm-none-eabi/lib LDLIBS += -lstdc++

But this ending up giving a massive amount of errors, so I figured it was the wrong direction.

Thanks for your help.

[Jørgen Holmefjord]

Another user had some similar issues when using Segger Embedded Studio. These were solved by setting the C++ standard to C++11. Could you try setting the flag -std=c++11 in your Makefile/GCC compilation?

[ishgum]

I set the -std=c++11 flag under CXXFLAGS to no effect. I also tried adding the linker flag -lstdc++ under LDFLAGS to no effect.

[Jørgen Holmefjord]

How about this suggestion?