TCLAP library version 1.1.0 contains a small bug: Including tclap/CmdLine.h more then once (in different files) causes linking errors.

Linking problem is caused by these functions:

TCLAP::OptionalUnlabeledTracker::check TCLAP::MultiSwitchArg::shortID TCLAP::MultiSwitchArg::longID

Declaring these 3 functions as “inline” fixes this bug.

I reported this bug to the author and he answered that this problem has been fixed in […]