Error compiling esp-AT project

[vapisoft]

I am using Visual Studio Code to compile the ESP-AT project.
I get a lot of errors in the MakeFiles.txt

For example in line 9:

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string(TOLOWER $ENV{ESP_AT_MODULE_NAME} LOWER_NAME)

The error was that it didn't have the: OUTPUT_VARIABLE

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string(TOLOWER $ENV{ESP_AT_MODULE_NAME} OUTPUT_VARIABLE LOWER_NAME)

In other lines it is more difficult to solve.
like in the following:

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string(SUBSTRING "${PLATFORM_STR}" 9 ${SUBSTR_LENGTH} OUTPUT_VARIABLE PLATFORM_NAME)

How can it be?
Maybe I am using the wrong ISE (Visual Studio Code) or the wrong compiler (mingw32-gcc.exe).

[esp-at]

ESP-AT does not support to compile by the Visual Studio Code IDE. you have to follow the guide: https://docs.espressif.com/projects/esp ... le_it.html
> you can browse the code by he VS code IDE.

please know.