Templates Instantiation error

drug drug2004 at bk.ru
Fri Dec 15 09:53:38 UTC 2017


15.12.2017 11:49, yes9111 пишет:
> Hey Y'all,
> 
> I'm trying to write a simple utility class to read rows from a SQLite3 
> database using compile time parameters, but I've run into a weird problem.
> 
> https://pastebin.com/eTnbRjEd
> 
> If I try to instantiate a Reader class I'm hitting a linker error saying
> 
> Error 42: Symbol Undefined _sqlite3_open
> 
> But if I change the Reader definition to include a dummy template 
> argument and instantiate it with any dummy type argument, the code 
> compiles ok. Am I missing something?
> 
It isn't template instantiation error. Undefined symbol means you need 
link your executable with some library that contains this undefined 
symbol. In your case you need to link to libsqlite.so (linux) or 
sqlite.dll (windows).


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