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why after deleting some functions, the IData Space overflow!

I got a demo sources from our chip vendor.
It can be compiled successfully!
However, after I comment out some functions, the compiler says that IData Space overflow. When I check the MAP file, I find that there is no ?STACK. Why?

I donot add any new file to the project, nor drop any file from the project. I only comment out several function calls in a file.

Why? Thanks a lot!

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  • Hi, Erik
    thanks! But can you tell me why this method can work?

    Suppose I donot define USE_FOO, then the call to function and the function implementation are not included, which is the same as that I delete the call to function and the function implementations.