Creating a custom library - linking error while compliing examples in examples folder [Solved]

Libraries
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1

Hello,

I’m writing a library to use openGoPro API on a ESP32 following the folder structure described in
https://docs.platformio.org/en/latest/librarymanager/creating.html: Sources (.cpp and .h) for the library is in src folder and examples are in examples folder like below.

    |--include
    |    |--GoProBLE.h
    |-src
    |    |--GoProBLE.cpp
    |--examples
    |    |--M5Stack
    |         |--main.cpp
    |--libary.json
    |--platformio.ini

I tried to setup my file platformio.ini like explained here: https://community.platformio.org/t/configure-platformio-ini-of-library-so-that-examples-can-be-compiled/24046 but I cannot link the example, I have always a link error. I tried to change lib_extra_dirs but I cannot make it work.

PlatformIO\Projects\OpenGoProBLE/examples/M5Stack/main.cpp:53: undefined reference to `GoProBLE::GoProBLE()’
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\ExM5Stack\firmware.elf] Error 1

my platformio.ini file is

[env]
platform = espressif32
framework = arduino
board = m5stack-core-esp32

monitor_speed=115200

[platformio]
src_dir = examples
lib_dir = ./

[env:ExM5Stack]
lib_extra_dirs =../../
lib_deps =
    m5stack/M5Stack @ ^0.4.6
    h2zero/NimBLE-Arduino@^1.4.1

src_filter = -<*> +<M5Stack/main.cpp>

If anyone knows how to fix it, maybe it’s easy as most libraries follow this pattern

3

Huh? But if this is from the platformio.ini that is also the library (??), that would exclude the src/GoProBLE.cpp file. Don’t you want to do at least -<*> +<../src/GoProBLE.cpp> +<M5Stack/main.cpp>

4

Thanks a lot, it works, I thought that lib_extra_dirs would do the trick
Things are easier when library code is in lib folder.