Build_opt.h only used when compiled with LTO #2698
Description
Describe the bug
After testing, I noticed that the Build_opt.h file is used only if, as a compilation optimization, one with LTO is chosen.
To Reproduce
The Build_opt.h file contains the following code:
-DSERIAL_RX_BUFFER_SIZE=512 -DSERIAL_TX_BUFFER_SIZE=512
-DMAVLINK_COMM_NUM_BUFFERS=4
-DPIN_SERIAL1_RX=PB7 -DPIN_SERIAL1_TX=PB6
-DENABLE_HWSERIAL1
-DPIN_SERIAL2_RX=PA3 -DPIN_SERIAL2_TX=PA2
-DENABLE_HWSERIAL2
-DPIN_SERIAL3_RX=PB9 -DPIN_SERIAL3_TX=PB8
-DENABLE_HWSERIAL3
-DPIN_SERIAL4_RX=PA1 -DPIN_SERIAL4_TX=PA0
-DENABLE_HWSERIAL4
Steps to reproduce the behavior:
Selected Board: STM32G0 Series
Board Part Number: Generic G070KBTx
Usart Support: Enabled (No generic Serial)
Compiled with Optimize - Smallest: No error and Ram usage dont change with Buffer size change
Compiled with Optimize - Smallest with LTO: Various error reporting "note: 'SerialX' was previously declared here" and Buffer Size changing with Buffer Size setting.
Expected behavior
The file Build_opt.h always working
Desktop (please complete the following information):
- Windows11
- Arduino IDE version: 2.3.4
- STM32 core version: 2.10.1
- Tools menu settings if not the default: Usart Support: Enabled (no generic Serial)
- Upload method: SWD
Board (please complete the following information):
- Name: STM32G0 Series
- Hardware Revision: Generic G070KBTx
Additional context
To solve the problem, I normally compiled with LTO but due to errors that appeared when I started implementing FreeRtos.
Without LTO the options in the Build_opt.h file are not applied for my project.