Library generation - Time and SD handlers

[brunolnetto]

Configuration

Linux PlatformIO Core 5.1.1

Description of problem

Hi,

I try to upload two libraries without success. They call "Einstein" and "FortuneTeller". The former provides a user-friendly time string from millis() command. The latter formats and manages SD cards content. I setup both with recommended config files. However, both fail to reproduce minimal examples I created. I utilize a Arduino UNO board, easy to use at home. The github URL are respectively below:

https://github.com/brunolnetto/einstein https://github.com/brunolnetto/fortuneteller

Steps to Reproduce

1. Download VS Code;
2. Install PlatformIO
3. Go to Libraries section and install both libraries
4. Build and run the examples

Actual Results

/tmp/ccLUQqK2.ltrans0.ltrans.o: In function `main':
<artificial>:(.text.startup+0x86): undefined reference to `setup'
<artificial>:(.text.startup+0x8e): undefined reference to `loop'
collect2: error: ld returned 1 exit status
*** [.pio/build/uno/firmware.elf] Error 1

Expected Results

No failed result. Serial monitor with time string printed.

If problems with PlatformIO Build System:

[env:uno] platform = atmelavr board = uno framework = arduino lib_deps = painlessmesh/arduinoUnity@^0.0.2

Source file to reproduce issue:

#include <Arduino.h>
#include <converters/fundamental.h>

long int TIME_SPAN = 1000;
long int BAUD_RATE = 9600;

void setup(){
    Serial.begin(BAUD_RATE);
}

void loop() {
    Serial.println(now());
    delay(TIME_SPAN);
}

[valeros]

Hi @brunolnetto ! The error message sounds pretty descriptive, so I'm not sure I understand your problem. Both links https://github.com/brunolnetto/einstein and https://github.com/brunolnetto/fortuneteller seem like broken PlatformIO projects. If they are libraries, then they cannot be compiled as standalone projects. But if that links represent projects where are the platformio.ini file and the main source file that contains the setup and loop functions?

[brunolnetto]

I am a new user with C common practices of programming. It is educational if you could help me fixing it. The examples are in the folder with this name. Thank you very much, my friend.

[valeros]

This repo is not the right place to ask such questions, please forward it to https://community.platformio.org/