STM32CubeIDE 1.14.0 flto build warning

[SKape]

Hello. I have the following problem. When I enable flto optimization in a (freshly generated) project, several dozen warnings appear during compilation.

Sample warnings:

Drivers/STM32L4xx_HAL_Driver/Src/subdir.mk:88: warning: pattern recipe did not update peer target 'Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.su'.

Drivers/STM32L4xx_HAL_Driver/Src/subdir.mk:88: warning: pattern recipe did not update peer target 'Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.cyclo'.

This problem was not present on the previous version 1.13.2

How to solve this problem?

[Souhaib MAZHOUD]

Hello @SKape

First let me thank you for posting.

Could you please provide the exact parameter settings that you used in order to reproduce your issue.

I will be waiting for your feedback.

Thx

Souhaib 

[SKape]

I'm generating a new one STM32 project using Wizard, for example for STM32F103CB.
In the project settings, in the compiler options (Tool Settings/MCU GCC Compiler/Miscellaneous/Other flags), I add the -flto option.
I add the same to the linker options. And that's all.
34 warnings appear during compilation.

[SKape]

@Souhaib MAZHOUD Were you able to reproduce the issue?

[Souhaib MAZHOUD]

Hello @SKape 
Yes, this problem is reproduced in my side, I will check it internally and get back to you as soon as possible.

Thank you

[Souhaib MAZHOUD]

Hello again,

After check, this issue is reported internally to our team (Internal ticket number: 167964) and this will be fixed as soon as possible.

Thank you!

Souhaib

[MD.8]

Having the same issue

[Christian3000]

I have also the same issue...

[Schmidt.Andreas]

I also use the -flto flag, so I got the same warnings....

BR

Andreas

[AHoll.2]

Hello,

i'd like to add, that i get the same problem (lots of "pattern recipe did not update peer target" from the build output, CubeIDE 1.14.0, STM32G474), but for a different reason (not using "-flto).

I use "-Wswitch-enum" for the whole project, but explicitly removed this setting for the "Driver" file tree.

Please also see here for a possible useful hint:

https://stackoverflow.com/questions/74449959/makefile-warning-pattern-recipe-did-not-update-peer-target

It seems this problem was introduced by version 4.4 of gnu-make.
So can i go back to pre-4.4 in CubeIDE, or is it hard-coded?

Thanks and BR,
Albert