[Interest] link error (and probably a dumb question)

[Rainer Wiesenfarth]

Am 16.09.2015 um 11:19 schrieb René J.V. Bertin:
> [...]  1st command fails and the 2nd succeeds:
>
> 1%> [...] g++ [...] -L/opt/local/build/qtbase/lib -lQt5Sql -lQt5Core.so [...]
> .obj/qsql_sqlite.o: In function `qMakeError':
> [...] undefined reference to `QSqlError::QSqlError [...]
>
> 2%> [...] g++ [...] /opt/local/build/qtbase/lib/libQt5Sql.so /opt/local/build/qtbase/lib/libQt5Core.so [...]
>
> [...]
>
> When I give only QtCore via a full path I'm left with errors about an undefined reference to
> QSqlError::QSqlError [...]

I _think_ that the first command resolves references strictly ordered 
(Q55Sql first, then Qt5Core) while the second resolves them in common.

In this case, using

   ... -lQt5Sql -lQt5Core -lQt5Sql ...

should solve the issue.


Another guess: Does replacing "-lQt5Core.so" with "-lQt5Core" in the 
first command change the behavior?

Best Regards / Mit freundlichen Grüßen
Rainer Wiesenfarth

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