On 2010-06-15, Alex Polbach <[email protected]> wrote:
> Thanks a lot for so fast answers!!
>
> I have added both flags to CFLAGS and LDFLAGS and they work just fine.
> Very neat solution.
I'm not sure how much those features get used with mspgcc, but I found
them to be invaluable if you want to share code between projects or if
you want to be able to do different builds of a project that have
different features enabled: when you disable (e.g. with #if/#endif) a
function, then all of the code/data that were used only by that
function is automatically left out. IIRC it worked even when you
disable code with if(0) {}.
When I first implemented those features for mspgcc there were obscure
cases where a function would get discarded when it shouldn't have been
due to omissions in the linker script. AFAIK, that shouldn't be a
problem, but it's something to keep it in mind if you get linker
errors due to inexplicably missing symbols: the solution is to mark
the symbol with the KEEP() command in the linker script.
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