Allow VECT_TAB_OFFSET to be set externally

[armandas]

Currently, in order to change the value of VECT_TAB_OFFSET, the user has to modify the system_stm32h7xx.c file. This is inconvenient in cases where the value has to change for different builds.

If the code was changed from:

#define VECT_TAB_OFFSET         0x00000000U

to

#ifndef VECT_TAB_OFFSET
#define VECT_TAB_OFFSET         0x00000000U
#endif

The user could define the value via a command line, like so -DVECT_TAB_OFFSET=0x00020000.

[utkarshsethi]

@ALABSTM I think this is duplicate/would also fix https://github.com/STMicroelectronics/cmsis_device_g4/issues/1

[okz]

not being able to define this externally, or having this inside a user block, is a real inconvenience, especially when developing seperate boot / application firmware.

It's are really small fix, is there a reason for not implementing it yet?

[ALABSTM]

Hi everyone,

@armandas, thank you for having reported. We already logged the point internally and are working on it, among many other points.

@utkarshsethi, you're absolutely right. This is the same issue as the one you mentioned. However, as the repos are different, we will keep track of them separately.

@okz, I understand your point. We will try to have this fix implemented, deployed, and released soon enough hopefully.

Thank you all for your patience and your comprehension.

With regards,

[ALABSTM]

ST Internal Reference: 116475