Creating dll in cygwin gives "Undefined reference" errors
Sat Jul 28 15:04:00 GMT 2007
Pradip Jadav wrote:
> But when I compiles in cygwin it gives me some "Undefined reference" errors.
> Take an example,
> undefined reference to `createlog(int, char*, ...)'
> Now this "createlog" function is defined in one of .cpp file of my
> main program.(Just for your information)
> Can you help me to solve problem of "undefined reference" ??
The undefined reference is because fundamentally ELF (Linux) and PE/COFF
(Windows) are very different in terms of how linking works under the
hood. The short explanation is that PE/COFF requires all references to
be resolved at link-time, thus you have to explicitly tell the linker
where createlog() is to be found.
But I've typed this explanation so many times, I think I'll just start
linking to past copies of it:
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