collect2.exe: error: ld returned 1 exit status about esp-link HOT 2 OPEN

It is not arduino framework.

from esp-link.

Thank you for a quick answer. Please help me a little more, by answering the following questions.
It seems that ESP8266 can work not only with arduino. I have Visual Studio Code + PlatformIO framework (for embedded systems like my ESP8266).
In this case, how can i compile this project? Maybe i can switch it to other platform, which supports this project esp-link (UART to WIFI bridge)? What IDEs and platforms (frameworks) can i use to work with this project on ESP8266?

In according with documentation on this project (https://github.com/jeelabs/esp-link), you can see that it supports arduino:
"flash-programming attached Arduino/AVR microcontrollers and LPC800-series and other ARM microcontrollers via Wifi"
"Note that http://github.com/jeelabs/esp-link is the original esp-link software which has notably been forked by arduino.org as Esp-Link and shipped with the initial Arduino Uno Wifi. The JeeLabs esp-link has evolved significantly since the fork and added cool new features as well as bug fixes."
"You can then attach a uC and upload a sketch:

• attach a uC (e.g. arduino) to your esp8266 module
• connect via the serial port to see a pre-loaded sketch running
• upload a fresh version of the sketch"

Can i solve this problem simply by replacing the "framework = arduino" string to other? What is the framework must be there?
On this page: https://docs.platformio.org/en/stable/frameworks/index.html there are full list of frameworks which PlatformIO supports:

Arduino
CMSIS
Energia
ESP8266 Non-OS SDK
ESP8266 RTOS SDK
Espressif IoT Development Framework
Freedom E SDK
FreeRTOS
Renesas Flexible Software Package
libopencm3
Mbed OS
PULP OS
PULP Runtime Environment
PULP SDK
Shakti SDK
Standard Peripheral Library
STM32Cube
WD-Firmware
WiringPi
Zephyr

from esp-link.