Defining the underlying type of an enumeration has been a difficult task until C23 added the feature. Previously different compilers used different methods and results could vary unexpectedly.
As seen in the image below, STM32CubeIDE v 1.19.0 can recognize this C23 feature and flag mistakes, such as the out-of-range value 0x101 for the 8-bit enum.
As seen in the gcc output below, the mistake is caught by gcc:
This is all as it should be. The problem is when I remove the fake out-of-range command, gcc works as expected but STM32CubeIDE flags a syntax error:
The build finished with no errors or warnings so gcc 13 understands at least this part of the C23 standard.
Is there a configuration within STM32CubeIDE to prevent displaying a Syntax error for code the compiler understands?
PS
I checked the generated assembly and it appears that the correct 8-bit code (ldrb) is being generated:
