topic HCS08 Compiler Warnings in CodeWarrior for MCU

HCS08 Compiler Warnings

tayars — Tue, 08 May 2012 03:31:22 GMT

Hello,

I am new to the CodeWarrior 10.1 environment and I am using the HCS08 Compiler for my project.

In my code I noticed that a static variable was being created and initialized at the start of a function but was never used and no warnings were thrown up.

Is there a -Wall argument to invoke somewhere for this compiler? How can I make sure this isn't happening elsewhere without scouring every file?

Thanks in advance,

Tom

Re: HCS08 Compiler Warnings

BlackNight — Tue, 08 May 2012 03:50:01 GMT

Hello,

yes, there is an option to ignore all warnings: -W2.

But the compiler will not produce a warning for an unreferenced static local. A static local variable is handled like a global variable (with different access scope, of course), an if it is not used, the linker will dead strip/remove it.

But you can find the information that it has been removed in the linker map file here:

*********************************************************************************************
UNUSED-OBJECTS SECTION
---------------------------------------------------------------------------------------------

Otherwise you could use a tool like PC-lint to catch these kind of things.

Hope this helps,

Re: HCS08 Compiler Warnings

tayars — Tue, 08 May 2012 22:21:27 GMT

Hi BK,

Thanks for the help. I was actually hoping the compiler would offer an option to turn on all warnings without the help of a tool like PC Lint. (The opposite of using -W2). But I shall concede defeat to another tool I guess.

The information about the unused object sections is valuable, I did not know that kind of output was included in the map file. Thanks for that!

Tom

Re: HCS08 Compiler Warnings

BlackNight — Tue, 08 May 2012 22:25:10 GMT

Hello,

the S08 compiler is pretty verbose about variables/etc. But not in this case for static locals. Too bad in this case.