ESP32 Forum

Posted: **Wed Oct 04, 2023 12:56 am**

Hello together,

currently I'm trying to include the lwm2m-protocol to the esp32-wroom.
So I'm trying among others to include an external project / library in the CMakeLists.txt of my esp32-project.
But cmake can`t find the includes imy "main.c".
I get the error messages `fatal error: lwm2m/connect.h: No such file or directory`;
Or `fatal error: ../../network_common.h: No such file or directory`.
If I get the first error message, then cmake can't find the include from my "main.c".
If I get the second error message, then cmake can't find the include from lwm2m/connect.h.

The external project that I am currently trying to include is wakaamaNode.
Here you can see the link to the external project: https://github.com/smartheim/wakaamaNode.git

I'm working on Ubuntu with with the VSCode-IDE. But the build process i do with idf.py v4.4.6 in the terminal.

Does anyone has an idea how I could include the src.cmake file or the src-directory so that cmake finds the includes?
I would be so gratefull if someone could help me. I currently do not know what I am doing wrong.

In the following I have tried to give an insight into my current project.

Code: [Select all] [Expand/Collapse]

/lwm2m-to-esp32-test02
    +---components 
    |   +...
    |
    +---main
    |   +---lwm2m-to-esp32-test02.c
    |   +---CMakeLists.txt
    |
    +---wakaamaNode
    |   +---src
    |       +---includes
    |       |   +---lwm2m
    |       |   |   +--connect.h
    |       |   |   + ...
    |       |   +---lwm2mObjects
    |       |       + ...
    |       +---network
    |       |   + ...
    |       +---...
    |       +---src.cmake
    |       
    +---partitions.csv
    +---sdkconfig
    +---CMakeLists.txt

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CMakeLists.txt

Code: [Select all] [Expand/Collapse]

cmake_minimum_required(VERSION 3.16)
 
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 
include(${CMAKE_CURRENT_LIST_DIR}/wakaamaNode/src/src.cmake) #fatal error: lwm2m/connect.h: No such file or directory
 
#include_directories(${CMAKE_CURRENT_LIST_DIR}/wakaamaNode/src/include/) # fatal error: ../../network_common.h: No such file or directory
#include_directories(${CMAKE_CURRENT_LIST_DIR}/wakaamaNode/src/network/) # fatal error: ../../network_common.h: No such file or directory
 
project(lwm2m-to-esp32-test02 VERSION 1.0.0)

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main/CMakkeLists.txt

Code: [Select all] [Expand/Collapse]

idf_component_register(SRCS "lwm2m-to-esp32-test02.c"
                    INCLUDE_DIRS ".")

lwm2m-to-esp32-test02.c

Code: [Select all] [Expand/Collapse]

#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <errno.h>
 
#include <time.h>
 
#include "cblink.h"
 
#include "lwm2m/connect.h" //???
#include "lwm2m/network.h"
//#include "connect.h"
//#include "network.h"
 
 
void app_main(void)
{
    config_blink();
 
    while(1){
        blink_on();
    }
 
}

many thanks
mmueller

ESP32 Forum

include error by using an external project

include error by using an external project