Make error 258
We all have this problem.
I read another thread today that this is fixed in a patch. I have not been able to try this yet.
Do this: Help menu -> Check for Updates, the update will install (V1.13.1).
I also found a fix on this forum,
Change (example for Eclipse and STSW4STM32) in Tool Settings - MCU GCC Compiler - Symbols,
from
weak=attribute__weak
packed=attributepacked__
to
'weak=attribute__weak'
'packed=attributepacked__'