-gcc\9.2.1-1.1/bin/arm-none-eabi-g++" -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mthumb t.h" -c -g -Og -Wall -std=gnu++14 -ffunction-sections -fdata-sections -nostdlib -fno-threadsafe-statics --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -fno-use-cxa-atexit -MMD "-IC:\Users\Richa\Documents\Github\Remote-Train-Sensor\Software\SAIN" res\arduino/avr" res\arduino/stm32" res\arduino/stm32/LL" res\arduino/stm32/usb" res\arduino/stm32/OpenAMP" res\arduino/stm32/usb/hid" res\arduino/stm32/usb/cdc" stem/Drivers/STM32L4xx_HAL_Driver/Inc" stem/Drivers/STM32L4xx_HAL_Driver/Src" stem/STM32L4xx" stem/Middlewares/ST/STM32_USB_Device_Library/Core/Inc" stem/Middlewares/ST/STM32_USB_Device_Library/Core/Src" stem/Middlewares/OpenAMP" stem/Middlewares/OpenAMP/open-amp/lib/include" stem/Middlewares/OpenAMP/libmetal/lib/include" stem/Middlewares/OpenAMP/virtual_driver" -DSTM32L4xx -DARDUINO=108010 -DARDUINO_NUCLEO_L452RE -DARDUINO_ARCH_STM32 -DBOARD_NAME=\"NUCLEO_L452RE\" -DSTM32L452xx -DHAL_UART_MODULE_ENABLED /Core/Include/" stem/Drivers/CMSIS/Device/ST/STM32L4xx/Include/" stem/Drivers/CMSIS/Device/ST/STM32L4xx/Source/Templates/gcc/" /DSP/Include" -I"C:\Users\Richa\DOCUME~1\Github\REMOTE~1\Software\SAIN" res\arduino"  -Og  -g3 -DVM_DEBUG_GDB riants\NUCLEO_L452RE"  -o o"
 
arm-none-eabi-g++*: error: #line: No such file or directory
Error compiling .ino project source
Build failed for project 'PROJ'
 
arm-none-eabi-g++*: error: 1: No such file or directory

Thanks for the report.

It seems to be an issue with the prebuild hook execution, as only the SrcWrapper.cpp is found as additional code, the build_opt.h isn't (from the full log)

If you run Build > Clean Solution, and then run the below command (the recipe.hooks.prebuild.1.pattern):
ols/win/busybox.exe" sh em/extras/prebuild.sh" "C:\Users\Richa\AppData\Local\Temp\VMBuilds\SAIN\STM32_Nucleo_64\Debug" "C:\Users\Richa\Documents\Github\Remote-Train-Sensor\Software\SAIN"

This will generate files in the <buildfolder>\sketch\ folder -- are both build_opt.h and SrcWrapper.cpp present?

Thanks for confirming, this is the root of the problem, as the file is referenced later in the build process.

The tool being used is part of the STM32 core, and it calls the script within the core\system\extras\prebuild.sh....  Do you have a file in your sketch folder called build_opt.h?

Ok thanks, so that's why the prebuild script isn't generating one.... (from reading the .sh script)

Is the build_opt.h copied into the build folder when you do a build?

If Yes - can you send the build_opt.h file after the build has finished so we can review?

#line 1 "C:\\Users\\Richa\\Documents\\Github\\YY\\Software\\YY\\build_opt.h"
-DHAL_MODULE_ENABLED
-DHAL_SAI_MODULE_ENABLED
-DHAL_TIM_MODULE_ENABLED
-DHAL_ADC_MODULE_ENABLED
-DHAL_MMC_MODULE_ENABLED
-DHAL_SD_MODULE_ENABLED
-DHAL_GPIO_MODULE_ENABLED
-DHAL_EXTI_MODULE_ENABLED
-DHAL_I2C_MODULE_ENABLED
-DHAL_DMA_MODULE_ENABLED
-DHAL_RCC_MODULE_ENABLED
-DHAL_FLASH_MODULE_ENABLED
-DHAL_PWR_MODULE_ENABLED
-DHAL_CORTEX_MODULE_ENABLED 

Thanks for the detail, we can replicate this now and will update as soon as a fix is available.