ESP32 Forum

Posted: **Tue Jul 25, 2023 8:13 am**

Hello. To make projects look more clean we use SolarLint extension that helps us prevent silly mistakes.

One of the issues I notice is that I am getting frequent warnings such as:

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	 "call to undeclared function 'gpio_set_level'; ISO C99 and later do not support implicit function declarations",

Even though I have include:

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 #include "driver/gpio.h"

Can someone help me understand what could be the issue and why it is not working properly?

: linting_issue.png (47.74 KiB) Viewed 5822 times

Posted: **Tue Jul 25, 2023 11:18 am**

Just to check, have you specified sonarlint.pathToCompileCommands setting? If you run the linter from the CLI, do you get the same error reported?

Posted: **Wed Jul 26, 2023 4:26 am**

ESP_igrr wrote: ↑
Tue Jul 25, 2023 11:18 am
Just to check, have you specified sonarlint.pathToCompileCommands setting? If you run the linter from the CLI, do you get the same error reported?

After downloading SonarLint extension, I havent configured anything, I was under impression it should work right out of the box.

Regarding the CLI, after a quick google search I havent found a way to run it from the CLI.

It is very strange because for example it does not complain about esp_deep_sleep_start() function so it seems to detect something. But I cannot wrap my head around why it wouldnt detect gpio functions

Posted: **Wed Jul 26, 2023 6:22 am**

In that case, please try configuring that option. Otherwise sonarLint can't find the paths where to search for the header files.
compile_commands.json file should be generated in build/ directory of your project.

Posted: **Wed Jul 26, 2023 8:25 am**

ESP_igrr wrote: ↑
Wed Jul 26, 2023 6:22 am
In that case, please try configuring that option. Otherwise sonarLint can't find the paths where to search for the header files.
compile_commands.json file should be generated in build/ directory of your project.

You were right. That was totally the issue.

I have went into SolarLint settings and noticed that it is refering to wrong compile_commands.json file:

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${workspaceFolder}\build\bootloader\compile_commands.json

instead, I have replaced it with

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${workspaceFolder}\build\compile_commands.json

And now it is working properly. Thanks for helping me out. Just out of curiosity though - what are the differences between build/bootloader/compile_commands.json and build/compile_commands.json?

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