How to add a 3rd party .c and .h file to SDK

[User_PP]

I want to include a 3rd party library in the sdk and use it in https://github.com/MaJerle/lwgps which is a library for parsing NMEA messages.

I came across this ticket : from Nordic in which it was stated to add

 

# SPDX-License-Identifier: Apache-2.0

cmake_minimum_required(VERSION 3.20.0)
find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
project(external_lib)

target_sources(app PRIVATE src/main.c)

include(ExternalProject)

# Add an external project to be able download and build the third
# party library. In this case downloading is not necessary as it has
# been committed to the repository.

set(MYLIB_LIB_DIR     ${CMAKE_CURRENT_SOURCE_DIR}/lib)
set(MYLIB_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/mylib/include)

# Create a wrapper CMake library that our app can link with
add_library(mylib_lib STATIC IMPORTED GLOBAL)
add_dependencies(
  mylib_lib
  mylib_project
  )
set_target_properties(mylib_lib PROPERTIES IMPORTED_LOCATION             ${MYLIB_LIB_DIR}/libmylib.a)
set_target_properties(mylib_lib PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${MYLIB_INCLUDE_DIR})

target_link_libraries(app PUBLIC mylib_lib)

but I don't understand what path should I add and I did'nt understand where to make changes in the above code I pasted. 

I am using Visual studio code, actinius icarus 

SDK :2.3.0

[Einarh]

Hello

Do you want to include simply a .c and .h file, or are you including a more complex module?

In the first case you can simply add these files to the /src directory in your project and add them to the build system using the target_sources macro like how it's done with main.c

In the other case you might find more of the info you need on this page:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/develop/modules.html#integrate-modules-in-zephyr-build-system

Best regards,

Einar

[User_PP]

The image below is what I found in the LWGPS documentation i.e, there are the modules that I want to include. 

Einarh said:

add them to the build system using the target_sources macro like how it's done with main.c

I did'nt quite understand what you mean by this. Could you explain this with an example? 

P.S: I pasted the .c and .h files in the CMakesLists.txt as 

target_sources(app PRIVATE src/lwgps.c)
target_sources(app PRIVATE src/lwgps_opts.h)

These are present in the source directory of project as you suggested and I tried accessing them from main.c as 

#include <lwgps_opts.h>

I am also attaching the whole file for reference.hello_world_nordic.zip 

Can you explain more elaborately this time please

[Einarh]

I'm not sure I understand you correctly.

Is LWGPS the library you want to include, or do you want to include a library into a LWGPS project?

-Einar

[User_PP]

LWGPS is the library file I want to include into my helloworld project

[Einarh]

Well in that case my answer would be the same as in the ticket you linked.

This sample demonstrates how to do this:

https://github.com/zephyrproject-rtos/zephyr/tree/main/samples/application_development/external_lib

In this sample they include the external library "mylib".

So instead of "mylib" you add lwgps to your application folder, and you change the CMakeLists.txt file accordingly.

-Einar