[LAD] G++ trouble
contact at alexandredenis.net
Mon Nov 16 14:52:53 CET 2020
On Mon, 16 Nov 2020 13:38:01 +0000
Will J Godfrey <WillGodfrey at musically.me.uk> wrote:
> Not wishing to hijack this thread but I'm still confused :(
> I just did a search of the whole of src. It's *used* about a dozen
> times across 5 otherwise unrelated .cpp files, but is only defined
> here. Just to be certain, I did a make clean before trying this
> again, and it's definitely saying multiple defs
> multiple definition of `ADD_COLOUR';
> first defined here
> This happens at the linker stage.
> Also, I thought the whole idea of putting things like this in a
> #ifndef/#def block was to ensure it was only set once.
It is only set once *per file* which includes the header. But since the
symbol is extern, the linker sees one public copy per file, which
conflict with each other.
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