hi
I`m using stm32duino core to compile my code for a stm32 discovery board(stm32f407vg).
I can compile it successfully in Arduino IDE but i get errors in VisualMicro(2020.318.1) on Visual Studio 2019(Community edition)

I`ve started new project with a simple blink code:

void setup()
{
	pinMode(PD13, OUTPUT);
	Serial.begin(115200);
}

void loop()
{
	digitalWrite(PD13, HIGH); delay(300);
	digitalWrite(PD13, LOW); delay(300);
	Serial.println(millis());
}
 

on first try to compile the code VMicro gives me Quote:
error. (complete log in vml1.txt attached). 

after looking around i found out this file (build_opt.h) if not provided should be created in compile routine.
So I made an empty "build_opt.h" file in Release folder.

Now compilation gives me a lot of "undefined reference" errors (complete log in vml2.txt attached). 

any help would be appreciated 

Thanks for the report, and this has highlighted a problem which only occurs in the 1.9.0 version of the STM32 Core with Visual Micro.

We are currently investigating this, and in the interim rolling back to the v1.8.0 STM32 core will work around the issue.

thanks!